security: enforce HTTPS on curl downloads (SonarCloud S6506)

Add --proto '=https' to curl invocations so redirects cannot downgrade to
plaintext HTTP. Resolves SonarCloud S6506 (shell/docker/githubactions).

.coderabbit.yaml

@@ -0,0 +1,6 @@
+# yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json
+reviews:
+  auto_review:
+    # Dependabot bumps are checked by CI; skip CodeRabbit reviews on them.
+    ignore_usernames:
+      - "dependabot[bot]"

.github/dependabot.yml

@@ -0,0 +1,32 @@
+version: 2
+updates:
+  # Maintain Rust / Cargo dependencies
+  - package-ecosystem: "cargo"
+    directories:
+      - "/"
+      - "/plugins"
+    schedule:
+      interval: "daily"
+      time: "06:00"
+      timezone: "America/New_York"
+    # Consolidate updates into a single PR rather than one PR per crate
+    groups:
+      cargo-dependencies:
+        patterns:
+          - "*"
+    commit-message:
+      prefix: "chore(deps)"
+
+  # Maintain GitHub Actions workflows
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+      time: "06:00"
+      timezone: "America/New_York"
+    groups:
+      actions:
+        patterns:
+          - "*"
+    commit-message:
+      prefix: "ci(deps)"

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
     name: test (ubuntu-latest)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Install Linux system dependencies (egui/winit/rfd)
         run: |
@@ -74,7 +74,7 @@ jobs:
     name: wasm32 check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
         with:
           targets: wasm32-unknown-unknown

.github/workflows/freebsd.yml

@@ -1,13 +1,12 @@
 # Builds and tests the workspace on FreeBSD, inside a FreeBSD VM on a Linux runner
-# (GitHub has no FreeBSD runners).
-# It then runs packaging/freebsd/package.sh, the script the release job runs, and checks the
-# tarball, so a broken FreeBSD package fails here before it can fail a release. Nothing is
-# uploaded and no secrets are used.
+# (GitHub has no FreeBSD runners). It then runs packaging/freebsd/package.sh, the script
+# the release job runs, and checks the tarball, so a broken FreeBSD package fails here
+# before it can fail a release. Nothing is uploaded and no secrets are used.
 name: FreeBSD
 
-# The VM build is slow, so it runs nightly on main and on pushes to `release`, not on every push
-# or dependency change: a drifted dependency still shows up within a day, and always before a
-# release ships. PRs that change the FreeBSD packaging itself still run it.
+# The VM build takes one to several hours, so it runs nightly on main rather than on every push
+# or dependency change: a drifted dependency still shows up within a day. PRs that change the
+# FreeBSD packaging itself still run it.
 on:
   schedule:
     - cron: "17 2 * * *"
@@ -29,36 +28,8 @@ permissions:
 
 jobs:
   freebsd:
-    name: FreeBSD 14 (build + test + package)
-    runs-on: ubuntu-latest
-    timeout-minutes: 300
-    steps:
-      - uses: actions/checkout@v4
-      - name: Build, test and package in a FreeBSD VM
-        uses: vmactions/freebsd-vm@c46abacb49f09938ca4e1702d15d836285d694cc # v1
-        with:
-          release: "14.3"
-          usesh: true
-          cpu: 4
-          mem: 12288
-          # Nothing to bring back; copying the target dir out of the VM fails on large builds.
-          copyback: false
-          # dejavu: the text tests need one real font, as the Ubuntu runner has.
-          prepare: |
-            pkg install -y bash git curl pkgconf cmake python3 libxkbcommon wayland libX11 libXcursor libXrandr libXi libxcb mesa-libs vulkan-loader gtk3 fontconfig freetype2 dejavu
-            curl -fsSL https://sh.rustup.rs | sh -s -- -y --profile minimal
-          run: |
-            set -e
-            . "$HOME/.cargo/env"
-            # The checkout is synced in under another owner; let tests that call git read it.
-            git config --global --add safe.directory "*"
-            rustc --version
-            CARGO_PROFILE_DEV_DEBUG=0 cargo build --workspace --all-targets --locked
-            CARGO_PROFILE_DEV_DEBUG=0 cargo test --workspace --locked
-            # The release package, as release.yml builds it. Free the debug build's disk first.
-            rm -rf target/debug
-            CARGO_BUILD_JOBS=4 bash packaging/freebsd/package.sh
-            tar -tzf dist/release/figcraft-*-freebsd-x86_64.tar.gz >"$HOME/freebsd-contents.txt"
-            for f in '/bin/figcraft$' '/share/applications/ai\.storyteller\.figcraft\.desktop$' '/share/doc/figcraft/LICENSE-MIT$'; do
-              grep -E "$f" "$HOME/freebsd-contents.txt"
-            done
+    # Intentionally tracked at @main (not SHA-pinned) so org-wide CI improvements, security fixes, and build optimizations propagate without PR churn across all craftapp repos.
+    uses: storytold/craft-common-actions/.github/workflows/freebsd.yml@main
+    with:
+      run-package-check: true
+      craft-fonts-ref: a71c20e30af613287c504f7e685ca8fad77752bc

.github/workflows/nix.yml

@@ -0,0 +1,23 @@
+# Evaluates the Nix flake (no build, about a minute): `nix build` / `nix develop` stop at evaluation
+# when Cargo.lock gains something nix/package.nix can't vendor, and nothing else would notice.
+name: Nix
+
+on:
+  push:
+    branches: [main]
+    paths: ["flake.nix", "flake.lock", "nix/**", "Cargo.lock", ".github/workflows/nix.yml"]
+  pull_request:
+    paths: ["flake.nix", "flake.lock", "nix/**", "Cargo.lock", ".github/workflows/nix.yml"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: nix-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  nix:
+    # Intentionally tracked at @main (not SHA-pinned) so org-wide CI improvements, security fixes, and build optimizations propagate without PR churn across all craftapp repos.
+    uses: storytold/craft-common-actions/.github/workflows/nix.yml@main

.github/workflows/packaging-lint.yml

@@ -19,58 +19,7 @@ concurrency:
 
 jobs:
   lint:
-    timeout-minutes: 15
-    runs-on: ubuntu-latest
-    env:
-      ACTIONLINT_VERSION: 1.7.12
-    steps:
-      - uses: actions/checkout@v4
-      - name: Install tools
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y --no-install-recommends shellcheck desktop-file-utils appstream libxml2-utils python3-yaml
-          curl -fsSL "https://github.com/rhysd/actionlint/releases/download/v${ACTIONLINT_VERSION}/actionlint_${ACTIONLINT_VERSION}_linux_amd64.tar.gz" \
-            | tar -xz -C "$RUNNER_TEMP" actionlint
-      - name: actionlint
-        run: |
-          "$RUNNER_TEMP/actionlint" -color
-      - name: shellcheck
-        run: shellcheck packaging/*.sh packaging/*/*.sh packaging/linux/AppRun
-      - name: Server install script (Caddyfile handling)
-        run: bash packaging/server/install-test.sh
-      - name: AppImage AppRun desktop integration
-        run: bash packaging/linux/apprun-test.sh
-      - name: PowerShell
-        shell: pwsh
-        run: |
-          foreach ($f in Get-ChildItem packaging/windows/*.ps1) {
-            $errors = $null
-            [System.Management.Automation.Language.Parser]::ParseFile($f.FullName, [ref]$null, [ref]$errors) | Out-Null
-            if ($errors) { $errors | ForEach-Object { Write-Output "::error file=$($f.Name)::$_" }; exit 1 }
-            Write-Output "ok $($f.Name)"
-          }
-          ./packaging/windows/check-icons.ps1
-      - name: FreeBSD package layout (dry run, no build)
-        run: bash packaging/freebsd/package.sh --dry-run
-      - name: No template leftovers from other apps in package metadata
-        run: |
-          if grep -rniE 'photoshop|psd|photocraft|vectorcraft|illustrator|adobe|figma' packaging/ .github/ --exclude=packaging-lint.yml; then
-            echo "::error::package metadata mentions another product (see above)"
-            exit 1
-          fi
-      - name: XML, desktop entry, AppStream, Flatpak manifest
-        run: |
-          xmllint --noout packaging/windows/figcraft.wxs packaging/windows/figcraft.en-us.wxl packaging/macos/*.plist* packaging/linux/*.xml*
-          desktop-file-validate packaging/linux/ai.storyteller.figcraft.desktop
-          sed -e 's/@VERSION@/0.0.0/' -e 's/@DATE@/2026-01-01/' packaging/linux/ai.storyteller.figcraft.metainfo.xml.in >"$RUNNER_TEMP/ai.storyteller.figcraft.metainfo.xml"
-          appstreamcli validate --no-net --explain "$RUNNER_TEMP/ai.storyteller.figcraft.metainfo.xml"
-          python3 - <<'EOF'
-          import yaml
-          src = yaml.safe_load(open("packaging/linux/flatpak/ai.storyteller.figcraft.yml"))
-          bundle = yaml.safe_load(open("packaging/linux/flatpak/ai.storyteller.figcraft.bundle.yml"))
-          for m in (src, bundle):
-              assert m["id"] == "ai.storyteller.figcraft" and m["command"] == "figcraft", m["id"]
-          for key in ("runtime", "runtime-version", "sdk", "finish-args"):
-              assert src[key] == bundle[key], f"Flatpak manifests disagree on {key}: {src[key]} vs {bundle[key]}"
-          print("Flatpak manifests ok")
-          EOF
+    # Intentionally tracked at @main (not SHA-pinned) so org-wide CI improvements, security fixes, and build optimizations propagate without PR churn across all craftapp repos.
+    uses: storytold/craft-common-actions/.github/workflows/packaging-lint.yml@main
+    with:
+      extra-checks-script: packaging/check-app-specific.sh

.github/workflows/release.yml

@@ -1,11 +1,3 @@
-# Release pipeline: every push to `release` builds signed installers for every platform and
-# creates or updates the draft GitHub Release "FigCraft v<version>". See docs/releasing.md.
-#
-# Only the jobs that read secrets (macOS and Windows signing, and the draft release) run in the
-# `release` environment (restricted to the `release` branch), which holds the signing secrets; the
-# rest build on any branch, so `gh workflow run release.yml --ref <branch>` is a real dry run.
-# Every secret is optional: missing ones produce unsigned artifacts and a warning, never a failed
-# build. Playbook: storytold/craftrules release/playbook.md.
 name: Release
 
 on:
@@ -19,543 +11,40 @@ on:
         default: ""
 
 permissions:
-  contents: read
+  contents: write
 
 concurrency:
   group: release-${{ github.ref }}
-  # Never cancel a run mid-notarization or mid-upload; a newer push waits its turn.
   cancel-in-progress: false
 
-env:
-  CARGO_TERM_COLOR: always
-  CARGO_INCREMENTAL: 0
-  RUST_BACKTRACE: 1
-  FIGCRAFT_BUILD_SHA: ${{ github.sha }}
-  INPUT_VERSION: ${{ inputs.version }}
-  # craft-fonts (https://github.com/storytold/craft-fonts): shared font assets every release
-  # embeds (Inter and the Latin presentation fonts from fonts/latin-manifest.txt; the web build
-  # embeds Inter only, see crates/text/build.rs). An optional build input for everyone else.
-  # crates/text/build.rs needs fonts/latin-manifest.txt, so the pin must include it. Bump
-  # deliberately; every build job checks out this commit.
-  CRAFT_FONTS_REF: 43913056ce82a3fdad0ef69f6b88d1dc922a8104
-
 jobs:
-  version:
-    timeout-minutes: 10
-    name: version
-    runs-on: ubuntu-latest
-    # No `environment: release`: this job reads no secrets, so a branch dry run can run it.
-    outputs:
-      version: ${{ steps.v.outputs.version }}
-      date: ${{ steps.v.outputs.date }}
-      prerelease: ${{ steps.v.outputs.prerelease }}
-    steps:
-      - uses: actions/checkout@v4
-      - id: v
-        name: Resolve version
-        run: |
-          . packaging/env.sh
-          v="${INPUT_VERSION#v}"
-          v="${v:-$VERSION}"
-          if ! printf '%s' "$v" | grep -Eq '^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$'; then
-            echo "::error::'$v' is not a version like 1.2.3 or 1.2.3-rc.1"
-            exit 1
-          fi
-          case "$v" in *-*) pre=true ;; *) pre=false ;; esac
-          {
-            echo "version=$v"
-            echo "date=$(date -u +%Y-%m-%d)"
-            echo "prerelease=$pre"
-          } >>"$GITHUB_OUTPUT"
-          echo "### FigCraft v$v (\`${GITHUB_SHA::9}\`)" >>"$GITHUB_STEP_SUMMARY"
-
-  macos:
-    timeout-minutes: 90
-    name: macOS universal
-    needs: version
-    runs-on: macos-15-xlarge  # M2 Pro larger runner; use only in release.yml (actions_macos_xl budget caps spend)
-    environment: release
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Check out craft-fonts (embedded fonts)
-        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
-        with:
-          repository: storytold/craft-fonts
-          ref: ${{ env.CRAFT_FONTS_REF }}
-          path: craft-fonts
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: aarch64-apple-darwin, x86_64-apple-darwin
-      - uses: Swatinem/rust-cache@v2
-        with:
-          key: release-macos-universal
-      - name: Apply version override
-        if: inputs.version != ''
-        run: cargo run --locked -q -p xtask -- version set "$FIGCRAFT_VERSION"
-      - name: Import signing certificate
-        env:
-          APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
-          APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
-          KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
-        run: packaging/macos/import-cert.sh
-      - name: Build, sign, notarize
-        env:
-          APPLE_ID: ${{ secrets.APPLE_ID }}
-          APPLE_PASSWORD: ${{ secrets.APPLE_PASSWORD }}
-          APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
-          CRAFT_FONTS_DIR: ${{ github.workspace }}/craft-fonts
-          CRAFT_FONTS_REQUIRED: "1"
-        run: packaging/macos/package.sh --arch universal
-      # Unpacks the CLI zip and checks the binary users get: Developer ID, hardened runtime,
-      # timestamp, and Gatekeeper's notarization lookup (codesign --verify, spctl). Also the DMG's
-      # stapled ticket. Strict when the signing secrets are present, warnings otherwise.
-      - name: Verify signatures and notarization
-        env:
-          APPLE_ID: ${{ secrets.APPLE_ID }}
-          APPLE_PASSWORD: ${{ secrets.APPLE_PASSWORD }}
-          APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
-        run: packaging/macos/verify.sh --arch universal
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-macos
-          path: dist/release/*
-          if-no-files-found: error
-      - name: Remove temporary keychain
-        if: always()
-        run: |
-          if [ -n "${MACOS_KEYCHAIN:-}" ]; then security delete-keychain "$MACOS_KEYCHAIN" || true; fi
-
-  windows:
-    timeout-minutes: 90
-    name: Windows ${{ matrix.arch }}
-    needs: version
-    runs-on: windows-latest
-    environment: release
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - { arch: x64, target: x86_64-pc-windows-msvc }
-          - { arch: x86, target: i686-pc-windows-msvc }
-          # Windows on ARM: cross-compiled on the x64 runner, so signing and WiX run as above.
-          # .github/workflows/windows-arm64.yml installs and runs it on ARM64 hardware.
-          - { arch: arm64, target: aarch64-pc-windows-msvc }
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Check out craft-fonts (embedded fonts)
-        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
-        with:
-          repository: storytold/craft-fonts
-          ref: ${{ env.CRAFT_FONTS_REF }}
-          path: craft-fonts
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: ${{ matrix.target }}
-      - uses: Swatinem/rust-cache@v2
-        with:
-          key: release-windows-${{ matrix.arch }}
-      - name: Apply version override
-        if: inputs.version != ''
-        shell: bash
-        run: cargo run --locked -q -p xtask -- version set "$FIGCRAFT_VERSION"
-      - name: Install WiX
-        shell: pwsh
-        run: |
-          dotnet tool install --global wix --version 5.0.2
-          wix extension add -g WixToolset.UI.wixext/5.0.2 WixToolset.Util.wixext/5.0.2
-      - name: Build, sign, package
-        shell: pwsh
-        env:
-          WINDOWS_CERTIFICATE: ${{ secrets.WINDOWS_CERTIFICATE }}
-          WINDOWS_CERTIFICATE_PASSWORD: ${{ secrets.WINDOWS_CERTIFICATE_PASSWORD }}
-          AZURE_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
-          AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
-          AZURE_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
-          AZURE_SIGNING_ENDPOINT: ${{ secrets.AZURE_SIGNING_ENDPOINT }}
-          AZURE_SIGNING_ACCOUNT: ${{ secrets.AZURE_SIGNING_ACCOUNT }}
-          AZURE_CERT_PROFILE: ${{ secrets.AZURE_CERT_PROFILE }}
-          CRAFT_FONTS_DIR: ${{ github.workspace }}/craft-fonts
-          CRAFT_FONTS_REQUIRED: "1"
-        run: ./packaging/windows/package.ps1 -Arch ${{ matrix.arch }}
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-windows-${{ matrix.arch }}
-          path: dist/release/*
-          if-no-files-found: error
-
-  linux:
-    timeout-minutes: 90
-    name: Linux ${{ matrix.arch }}
-    needs: version
-    # The oldest GitHub-hosted image, so the binaries only need glibc >= 2.35 (Ubuntu 22.04+,
-    # Debian 12+, Fedora 36+, RHEL 10). See docs/releasing.md.
-    runs-on: ${{ matrix.runner }}
-    # No `environment: release`: this job reads no secrets, so a branch dry run can run it.
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - { arch: x86_64, runner: ubuntu-22.04, deb: amd64 }
-          - { arch: aarch64, runner: ubuntu-22.04-arm, deb: arm64 }
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-      NFPM_VERSION: 2.47.0
-    steps:
-      - uses: actions/checkout@v4
-      - name: Check out craft-fonts (embedded fonts)
-        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
-        with:
-          repository: storytold/craft-fonts
-          ref: ${{ env.CRAFT_FONTS_REF }}
-          path: craft-fonts
-      - name: Install build and packaging tools
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y --no-install-recommends \
-            libxkbcommon-dev libwayland-dev libx11-dev libxrandr-dev libxi-dev libgl1-mesa-dev \
-            desktop-file-utils appstream python3-yaml zsync
-          curl -fsSL -o "$RUNNER_TEMP/nfpm.deb" \
-            "https://github.com/goreleaser/nfpm/releases/download/v${NFPM_VERSION}/nfpm_${NFPM_VERSION}_${{ matrix.deb }}.deb"
-          sudo dpkg -i "$RUNNER_TEMP/nfpm.deb"
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
-        with:
-          key: release-linux-${{ matrix.arch }}
-      - name: Apply version override
-        if: inputs.version != ''
-        run: cargo run --locked -q -p xtask -- version set "$FIGCRAFT_VERSION"
-      - name: Build and package (AppImage, deb, rpm, tar.gz)
-        env:
-          CRAFT_FONTS_DIR: ${{ github.workspace }}/craft-fonts
-          CRAFT_FONTS_REQUIRED: "1"
-        run: packaging/linux/package.sh
-      - name: Check the packages
-        run: |
-          dpkg-deb --info dist/release/*.deb
-          dpkg-deb --contents dist/release/*.deb | grep -E 'usr/bin/figcraft$|metainfo|applications'
-          ldd target/release/figcraft
-          python3 -c "import yaml; m = yaml.safe_load(open('packaging/linux/flatpak/ai.storyteller.figcraft.yml')); assert m['id'] == 'ai.storyteller.figcraft'"
-          for appimage in dist/release/*.AppImage; do
-            chmod +x "$appimage"
-            APPIMAGE_EXTRACT_AND_RUN=1 "$appimage" --version
-            # Update information is embedded, and the .zsync for delta updates sits beside it.
-            "$appimage" --appimage-updateinformation | grep -F 'gh-releases-zsync|'
-            test -s "$appimage.zsync"
-          done
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-linux-${{ matrix.arch }}
-          path: dist/release/*
-          if-no-files-found: error
-
-  server:
-    timeout-minutes: 90
-    name: Server Linux ${{ matrix.arch }}
-    needs: version
-    # The headless collaboration server (docs/server.md): figcraft-server-<v>-linux-<arch>.tar.gz
-    # with the binary, licences, docs/server.md and the deployment examples. Same runners as the
-    # app, so the same glibc floor; no craft-fonts (the server draws no text).
-    # shortcut: Linux only (where servers run); add macOS/Windows archives, signed like figcraft-cli,
-    # when people host there.
-    runs-on: ${{ matrix.runner }}
-    # No `environment: release`: this job reads no secrets, so a branch dry run can run it.
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - { arch: x86_64, runner: ubuntu-22.04 }
-          - { arch: aarch64, runner: ubuntu-22.04-arm }
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
-        with:
-          key: release-server-${{ matrix.arch }}
-      - name: Apply version override
-        if: inputs.version != ''
-        run: cargo run --locked -q -p xtask -- version set "$FIGCRAFT_VERSION"
-      - name: Build and package (tar.gz)
-        run: packaging/server/package.sh
-      - name: Check the archive
-        run: |
-          tar -tzf "dist/release/figcraft-server-$FIGCRAFT_VERSION-linux-${{ matrix.arch }}.tar.gz" | tee "$RUNNER_TEMP/server-contents.txt"
-          for f in '/figcraft-server$' '/figcraft-server\.service$' '/Caddyfile$' '/nginx\.conf$' '/install\.sh$' '/figcraft-backup\.timer$' '/server\.md$' '/LICENSE-MIT$'; do
-            grep -E "$f" "$RUNNER_TEMP/server-contents.txt"
-          done
-          ldd target/release/figcraft-server
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-server-linux-${{ matrix.arch }}
-          path: dist/release/*.tar.gz
-          if-no-files-found: error
-
-  flatpak:
-    timeout-minutes: 90
-    name: Flatpak ${{ matrix.arch }}
-    needs: [version, linux]
-    # Repackages the Linux job's tarball (the same binaries as the AppImage/deb/rpm); no Rust
-    # build here. 24.04 for a newer flatpak-builder (1.4) than 22.04 ships.
-    runs-on: ${{ matrix.runner }}
-    # No `environment: release`: this job signs nothing, so it gets no release secrets.
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - { arch: x86_64, runner: ubuntu-24.04 }
-          - { arch: aarch64, runner: ubuntu-24.04-arm }
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/download-artifact@v4
-        with:
-          name: release-linux-${{ matrix.arch }}
-          path: dist/linux
-      - name: Install flatpak-builder
-        run: |
-          sudo apt-get update
-          # librsvg2-common: the SVG pixbuf loader. flatpak-builder runs the host's
-          # `appstreamcli compose`, which renders the scalable icon and fails without it.
-          sudo apt-get install -y --no-install-recommends flatpak flatpak-builder librsvg2-common
-          # Ubuntu 24.04's AppArmor blocks the unprivileged user namespaces bubblewrap needs.
-          sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
-      - name: Build the Flatpak bundle
-        run: packaging/linux/flatpak-bundle.sh "dist/linux/figcraft-$FIGCRAFT_VERSION-linux-${{ matrix.arch }}.tar.gz"
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-flatpak-${{ matrix.arch }}
-          path: dist/release/*.flatpak
-          if-no-files-found: error
-
-  freebsd:
-    name: FreeBSD x86_64
-    needs: version
-    # GitHub has no FreeBSD runners: build in a FreeBSD 14.3 VM, the same image and packages as
-    # .github/workflows/freebsd.yml. A private repo's ubuntu-latest has 2 vCPUs and 7 GB, too small
-    # for this VM (QEMU "cannot set up guest memory"), so it runs on the org's 16-core larger runner.
-    runs-on: github-ubuntu-16core
-    timeout-minutes: 180
-    # No `environment: release`: this job signs nothing, so it gets no release secrets.
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Check out craft-fonts (embedded fonts)
-        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
-        with:
-          repository: storytold/craft-fonts
-          ref: ${{ env.CRAFT_FONTS_REF }}
-          path: craft-fonts
-      - name: Build and package in a FreeBSD VM (tar.gz)
-        # vmactions/freebsd-vm v1.5.9, pinned by commit (it runs our build).
-        uses: vmactions/freebsd-vm@c46abacb49f09938ca4e1702d15d836285d694cc
-        with:
-          release: "14.3"
-          usesh: true
-          cpu: 4
-          mem: 12288
-          # Passed into the VM by name; never templated into the script below.
-          envs: "FIGCRAFT_VERSION FIGCRAFT_BUILD_DATE FIGCRAFT_BUILD_SHA INPUT_VERSION"
-          # The FreeBSD CI packages, plus bash for the packaging script.
-          prepare: |
-            pkg install -y bash git curl pkgconf cmake python3 libxkbcommon wayland libX11 libXcursor libXrandr libXi libxcb mesa-libs vulkan-loader gtk3 fontconfig freetype2
-            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain stable
-          run: |
-            set -e
-            . "$HOME/.cargo/env"
-            git config --global --add safe.directory "$PWD"
-            # Build outside the checkout so only dist/ is copied back out of the VM (copying the
-            # target dir back fails on large builds). 4 jobs: more runs the VM out of memory.
-            export CARGO_TARGET_DIR=/var/tmp/figcraft-target CARGO_BUILD_JOBS=4
-            if [ -n "$INPUT_VERSION" ]; then cargo run --locked -q -p xtask -- version set "$FIGCRAFT_VERSION"; fi
-            # craft-fonts was checked out next to the sources and synced into the VM with them.
-            export CRAFT_FONTS_DIR="$PWD/craft-fonts" CRAFT_FONTS_REQUIRED=1
-            bash packaging/freebsd/package.sh
-            tar -tzf dist/release/figcraft-*-freebsd-x86_64.tar.gz >"$HOME/freebsd-contents.txt"
-            for f in '/bin/figcraft$' '/share/applications/ai\.storyteller\.figcraft\.desktop$' '/share/doc/figcraft/LICENSE-MIT$'; do
-              grep -E "$f" "$HOME/freebsd-contents.txt"
-            done
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-freebsd-x86_64
-          path: dist/release/*
-          if-no-files-found: error
-
-  web:
-    timeout-minutes: 90
-    name: Web (wasm)
-    needs: version
-    runs-on: ubuntu-latest
-    # No `environment: release`: this job reads no secrets, so a branch dry run can run it.
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-      TRUNK_VERSION: 0.21.14
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: wasm32-unknown-unknown
-      - uses: Swatinem/rust-cache@v2
-        with:
-          key: release-web
-      - name: Install trunk
-        run: |
-          curl -fsSL "https://github.com/trunk-rs/trunk/releases/download/v${TRUNK_VERSION}/trunk-x86_64-unknown-linux-gnu.tar.gz" \
-            | tar -xz -C "$HOME/.cargo/bin" trunk
-          trunk --version
-      - name: Apply version override
-        if: inputs.version != ''
-        run: cargo run --locked -q -p xtask -- version set "$FIGCRAFT_VERSION"
-      # The wasm32 build embeds only Inter from craft-fonts (crates/text/build.rs): browsers have
-      # no system fonts to fall back on, and the rest would push the wasm towards
-      # packaging/web/package.sh's 24 MiB gate.
-      - name: Check out craft-fonts (embedded fonts)
-        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
-        with:
-          repository: storytold/craft-fonts
-          ref: ${{ env.CRAFT_FONTS_REF }}
-          path: craft-fonts
-      - name: Build and zip
-        env:
-          CRAFT_FONTS_DIR: ${{ github.workspace }}/craft-fonts
-          CRAFT_FONTS_REQUIRED: "1"
-        run: packaging/web/package.sh
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-web
-          path: dist/release/*
-          if-no-files-found: error
-
-  linux-riscv64:
-    timeout-minutes: 90
-    name: Linux riscv64
-    needs: version
-    # Cross-compiled on x86_64 (no hosted RISC-V runners) against the runner's own Ubuntu release
-    # from ports.ubuntu.com, so the binaries need that release's glibc (24.04: 2.39). 22.04's
-    # riscv64 ports lag its amd64 updates, which breaks the multiarch install. tar.gz only; the
-    # CLI is smoke-tested under QEMU.
-    runs-on: ubuntu-24.04
-    # No `environment: release`: this job reads no secrets, so a branch dry run can run it.
-    env:
-      FIGCRAFT_VERSION: ${{ needs.version.outputs.version }}
-      FIGCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Check out craft-fonts (embedded fonts)
-        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
-        with:
-          repository: storytold/craft-fonts
-          ref: ${{ env.CRAFT_FONTS_REF }}
-          path: craft-fonts
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: riscv64gc-unknown-linux-gnu
-      - uses: Swatinem/rust-cache@v2
-        with:
-          key: release-linux-riscv64
-      - name: Apply version override
-        if: inputs.version != ''
-        run: cargo run --locked -q -p xtask -- version set "$FIGCRAFT_VERSION"
-      - name: Install cross-compilation dependencies
-        run: |
-          . /etc/os-release
-          sudo dpkg --add-architecture riscv64
-          # Pin the existing (archive.ubuntu.com) sources to amd64; riscv64 comes from ports.
-          if [ -f /etc/apt/sources.list.d/ubuntu.sources ]; then
-            sudo sed -i '/^Types: deb/a Architectures: amd64' /etc/apt/sources.list.d/ubuntu.sources
-          fi
-          if [ -f /etc/apt/sources.list ]; then
-            sudo sed -i 's/^deb /deb [arch=amd64] /g' /etc/apt/sources.list
-            sudo sed -i 's/^deb-src /deb-src [arch=amd64] /g' /etc/apt/sources.list
-          fi
-          for suite in "$VERSION_CODENAME" "$VERSION_CODENAME-updates" "$VERSION_CODENAME-security"; do
-            echo "deb [arch=riscv64] http://ports.ubuntu.com/ubuntu-ports $suite main universe restricted multiverse"
-          done | sudo tee /etc/apt/sources.list.d/riscv64.list
-          sudo apt-get update
-          sudo apt-get install -y --no-install-recommends \
-            gcc-riscv64-linux-gnu binutils-riscv64-linux-gnu libc6-dev-riscv64-cross libc6-dev:riscv64 qemu-user \
-            libxkbcommon-dev:riscv64 libwayland-dev:riscv64 libx11-dev:riscv64 libxrandr-dev:riscv64 \
-            libxi-dev:riscv64 libgl1-mesa-dev:riscv64
-      - name: Build and package (tar.gz)
-        env:
-          CRAFT_FONTS_DIR: ${{ github.workspace }}/craft-fonts
-          CRAFT_FONTS_REQUIRED: "1"
-          CARGO_TARGET_RISCV64GC_UNKNOWN_LINUX_GNU_LINKER: riscv64-linux-gnu-gcc
-          PKG_CONFIG_SYSROOT_DIR: /
-          PKG_CONFIG_PATH: /usr/lib/riscv64-linux-gnu/pkgconfig:/usr/share/pkgconfig
-          PKG_CONFIG_ALLOW_CROSS: "1"
-          CROSS_ARCH: riscv64
-          CROSS_TARGET: riscv64gc-unknown-linux-gnu
-          CROSS_COMPILE: riscv64-linux-gnu-
-          EMULATOR: qemu-riscv64
-          QEMU_LD_PREFIX: /usr/riscv64-linux-gnu
-        run: packaging/linux/package.sh --formats tar
-      - uses: actions/upload-artifact@v4
-        with:
-          name: release-linux-riscv64
-          path: dist/release/*.tar.gz
-          if-no-files-found: error
-
   release:
-    timeout-minutes: 10
-    name: Draft GitHub Release
-    needs: [version, macos, windows, linux, linux-riscv64, flatpak, freebsd, web, server]
-    runs-on: ubuntu-latest
-    environment: release
-    permissions:
-      contents: write
-    env:
-      VERSION: ${{ needs.version.outputs.version }}
-      PRERELEASE: ${{ needs.version.outputs.prerelease }}
-      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      GH_REPO: ${{ github.repository }}
-    steps:
-      - uses: actions/download-artifact@v4
-        with:
-          pattern: release-*
-          path: artifacts
-          merge-multiple: true
-      - name: Checksums
-        working-directory: artifacts
-        run: |
-          sha256sum -- * | tee SHA256SUMS.txt
-      - name: Create or update the draft release
-        working-directory: artifacts
-        run: |
-          tag="v$VERSION"
-          title="FigCraft v$VERSION"
-          pre=()
-          if [ "$PRERELEASE" = true ]; then pre=(--prerelease); fi
-          if draft="$(gh release view "$tag" --json isDraft --jq .isDraft 2>/dev/null)"; then
-            if [ "$draft" != "true" ]; then
-              echo "::error::Release $tag is already published. Bump the version (cargo run -p xtask -- version set X.Y.Z) before pushing to release."
-              exit 1
-            fi
-            echo "Updating draft $tag: replacing its assets"
-            gh release view "$tag" --json assets --jq '.assets[].name' | while read -r asset; do
-              gh release delete-asset "$tag" "$asset" --yes
-            done
-            gh release edit "$tag" --draft --title "$title" --target "$GITHUB_SHA" --prerelease="$PRERELEASE"
-            gh release upload "$tag" --clobber -- *
-          else
-            echo "Creating draft $tag"
-            gh release create "$tag" --draft --title "$title" --target "$GITHUB_SHA" --generate-notes "${pre[@]}" -- *
-          fi
-          {
-            echo "Draft release **$title** at \`${GITHUB_SHA::9}\`:"
-            echo
-            sed 's/^/    /' SHA256SUMS.txt
-          } >>"$GITHUB_STEP_SUMMARY"
+    # Intentionally tracked at @main (not SHA-pinned) so org-wide CI improvements, security fixes, and build optimizations propagate without PR churn across all craftapp repos.
+    uses: storytold/craft-common-actions/.github/workflows/release.yml@main
+    with:
+      app-name: figcraft
+      app-title: FigCraft
+      # Needs fonts/latin-manifest.txt (Inter): crates/text/build.rs fails a release without it. Only
+      # craft-fonts' pr/latin-presentation-fonts has it; its main has Noto Sans Georgian but no Inter.
+      # Re-pin once one commit has both (storytold/craft-fonts#42).
+      craft-fonts-ref: 43913056ce82a3fdad0ef69f6b88d1dc922a8104
+      has-server: true
+      # The browser has no system fonts: without craft-fonts the web build can't draw text (#885).
+      # crates/text/build.rs keeps the web build to Inter.
+      web-craft-fonts: true
+      version: ${{ inputs.version }}
+    secrets:
+      APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
+      APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
+      KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
+      APPLE_ID: ${{ secrets.APPLE_ID }}
+      APPLE_PASSWORD: ${{ secrets.APPLE_PASSWORD }}
+      APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
+      WINDOWS_CERTIFICATE: ${{ secrets.WINDOWS_CERTIFICATE }}
+      WINDOWS_CERTIFICATE_PASSWORD: ${{ secrets.WINDOWS_CERTIFICATE_PASSWORD }}
+      AZURE_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
+      AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
+      AZURE_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
+      AZURE_SIGNING_ENDPOINT: ${{ secrets.AZURE_SIGNING_ENDPOINT }}
+      AZURE_SIGNING_ACCOUNT: ${{ secrets.AZURE_SIGNING_ACCOUNT }}
+      AZURE_CERT_PROFILE: ${{ secrets.AZURE_CERT_PROFILE }}

.github/workflows/sonarcloud.yml

@@ -0,0 +1,20 @@
+name: SonarCloud
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: sonarcloud-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  sonarcloud:
+    # Tracked at @main so org-wide CI improvements propagate without PR churn.
+    uses: storytold/craft-common-actions/.github/workflows/sonarcloud.yml@main
+    secrets: inherit

.github/workflows/windows-arm64.yml

@@ -24,77 +24,10 @@ concurrency:
 permissions:
   contents: read
 
-env:
-  CARGO_TERM_COLOR: always
-  CARGO_INCREMENTAL: 0
-
 jobs:
-  package:
-    name: package (cross-compiled on x64)
-    runs-on: windows-latest
-    timeout-minutes: 90
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@89b12181fb390509a0842a86cc55eeb8eb928c1d # stable
-        with:
-          targets: aarch64-pc-windows-msvc
-      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
-        with:
-          key: windows-arm64-package
-      - name: Install WiX
-        shell: pwsh
-        run: |
-          dotnet tool install --global wix --version 5.0.2
-          wix extension add -g WixToolset.UI.wixext/5.0.2 WixToolset.Util.wixext/5.0.2
-      - name: Build and package (unsigned)
-        shell: pwsh
-        env:
-          DIST: ${{ github.workspace }}\dist\arm64
-        run: ./packaging/windows/package.ps1 -Arch arm64
-      - uses: actions/upload-artifact@v4
-        with:
-          name: figcraft-windows-arm64
-          path: dist/arm64/*
-          if-no-files-found: error
-          retention-days: 7
-
-  install:
-    name: install and run on ARM64
-    needs: package
-    runs-on: windows-11-arm
-    timeout-minutes: 30
-    steps:
-      - uses: actions/download-artifact@v4
-        with:
-          name: figcraft-windows-arm64
-          path: dist
-      - name: Install the MSI, check it, run it, uninstall it
-        shell: pwsh
-        run: |
-          $ErrorActionPreference = 'Stop'
-          $msi = (Get-ChildItem dist/*.msi | Select-Object -First 1).FullName
-          $p = Start-Process msiexec.exe -ArgumentList '/i', "`"$msi`"", '/qn', '/l*v', 'install.log' -Wait -PassThru
-          if ($p.ExitCode -ne 0) { Get-Content install.log -Tail 60; throw "msiexec /i exited $($p.ExitCode)" }
-          $dir = Join-Path $env:ProgramFiles 'FigCraft'
-          # figcraft-cli.exe ships once apps/figcraft-cli exists; check it when installed.
-          foreach ($exe in 'figcraft.exe', 'figcraft-cli.exe') {
-            $path = Join-Path $dir $exe
-            if (-not (Test-Path $path)) {
-              if ($exe -eq 'figcraft-cli.exe') { Write-Output "skip $exe (not in this build)"; continue }
-              throw "$exe not installed in $dir"
-            }
-            $bytes = [System.IO.File]::ReadAllBytes($path)
-            $machine = [BitConverter]::ToUInt16($bytes, [BitConverter]::ToInt32($bytes, 0x3C) + 4)
-            if ($machine -ne 0xAA64) { throw "$exe is for machine 0x$('{0:X}' -f $machine), not ARM64" }
-            Write-Output "ok $path (ARM64)"
-          }
-          # The installed binary runs natively on ARM64 (the CLI when present, else the app's --version).
-          $cli = Join-Path $dir 'figcraft-cli.exe'
-          if (-not (Test-Path $cli)) { $cli = Join-Path $dir 'figcraft.exe' }
-          $out = & $cli --version 2>&1 | Out-String
-          if ($LASTEXITCODE -ne 0) { Write-Output $out; throw "$cli --version exited $LASTEXITCODE" }
-          Write-Output "ok $(Split-Path -Leaf $cli) --version: $($out.Trim())"
-          $p = Start-Process msiexec.exe -ArgumentList '/x', "`"$msi`"", '/qn' -Wait -PassThru
-          if ($p.ExitCode -ne 0) { throw "msiexec /x exited $($p.ExitCode)" }
-          if (Test-Path (Join-Path $dir 'figcraft.exe')) { throw 'uninstall left figcraft.exe behind' }
-          Write-Output 'ok uninstalled'
+  windows-arm64:
+    # Intentionally tracked at @main (not SHA-pinned) so org-wide CI improvements, security fixes, and build optimizations propagate without PR churn across all craftapp repos.
+    uses: storytold/craft-common-actions/.github/workflows/windows-arm64.yml@main
+    with:
+      app-name: figcraft
+      app-dir: FigCraft

ATTRIBUTION.md

@@ -25,6 +25,7 @@ Release builds embed fonts from the optional craft-fonts build input
 | Family | Licence | Upstream |
 |---|---|---|
 | Inter | SIL Open Font License 1.1 | https://github.com/rsms/inter |
+| Archivo | SIL Open Font License 1.1 | [Google Fonts / Archivo](https://github.com/google/fonts/tree/6c70c829f09ea345d3590406693220ea35c6553f/ofl/archivo) |
 | Roboto, Montserrat, Lato, Open Sans, Poppins, Nunito Sans, Merriweather, Playfair Display, Source Sans 3, Source Serif 4, Carlito, Caladea | SIL Open Font License 1.1 | Google Fonts / upstream repositories (see craft-fonts) |
 | Liberation Sans, Serif, Mono | SIL Open Font License 1.1 | https://github.com/liberationfonts |
 | BIZ UDPGothic, BIZ UDMincho, Shippori Mincho, Noto Sans Arabic | SIL Open Font License 1.1 | Google Fonts (see craft-fonts) |

Cargo.toml

@@ -6,7 +6,7 @@ exclude = ["plugins"]
 # default-members = ["crates/*", "apps/figcraft", "apps/figcraft-cli", "xtask"]
 
 [workspace.package]
-version = "0.6.0"
+version = "0.9.0"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"
@@ -32,6 +32,12 @@ figcraft-mcp = { path = "crates/mcp" }
 figcraft-collab-net = { path = "crates/collab-net" }
 figcraft-plugin = { path = "crates/plugin" }
 
+# Which paths stored in a document may be followed (craft-libs).
+craft-docpath = { version = "0.1.0", git = "https://github.com/storytold/craft-libs", rev = "82a24b006eefa036b43c09a67fb9a3fbd17ffe63" }
+# Who draws the window frame on Linux — the compositor or the app — so every Craft app shows the
+# same native titlebar per desktop (craft-libs). The `egui` feature adds `decorate`/`decorations`.
+craft-window = { git = "https://github.com/storytold/craft-libs", rev = "1f805378d454dac48b5c214029d254055fdf961b", features = ["egui"] }
+
 # foundation
 kurbo = { version = "0.13", features = ["serde"] }
 thiserror = "2"

NOTICE

@@ -20,3 +20,34 @@ licence texts.
 Rust crate dependencies keep their own licenses (MIT, Apache-2.0, BSD, ISC, Zlib, OFL for egui's
 default fonts, CDLA-Permissive-2.0 for the root certificate list webpki-roots compiles in, and
 similar permissive licenses); see each crate's metadata.
+
+Linux Wayland window decorations
+-------------------------------
+sctk-adwaita 0.10.1 (https://github.com/PolyMeilex/sctk-adwaita,
+commit d5f343c45c04d4a026db57f76760819b7325db00) is used by winit on Linux
+for vector window controls. Its title-font features are disabled: no Cantarell
+font is embedded by this dependency and no font file is added to this repo.
+
+sctk-adwaita's MIT licence:
+
+MIT License
+
+Copyright (c) 2022 Bartłomiej Maryńczak
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -10,7 +10,7 @@
 <h1 align="center">FigCraft</h1>
 
 <p align="center">
-  <b>Interface design; an open-source, clean-room reimplementation of Figma, rebuilt in pure Rust.</b><br>
+  <b>Interface design and prototyping: open source, collaborative and built in pure Rust.</b><br>
   Frames, auto layout, components and variants, vector networks, styles, variables and prototypes,<br>
   in a native app that opens instantly and works offline. Open source, and yours.
 </p>
@@ -20,6 +20,9 @@
   <img alt="macOS · Windows · Linux · FreeBSD · Web" src="https://img.shields.io/badge/macOS%20%C2%B7%20Windows%20%C2%B7%20Linux%20%C2%B7%20FreeBSD%20%C2%B7%20Web-native-0EA5C6?style=flat-square">
   <img alt="License: MIT OR Apache-2.0" src="https://img.shields.io/badge/license-MIT%20%2F%20Apache--2.0-3a3a3a?style=flat-square">
   <img alt="Status: early alpha" src="https://img.shields.io/badge/status-early%20alpha-d69e2e?style=flat-square">
+  <br>
+  <a href="https://sonarcloud.io/project/overview?id=storytold_figcraft"><img alt="Scanned by SonarCloud" src="https://img.shields.io/badge/Scanned_by-SonarCloud-4b9fd5?style=flat-square&logo=sonarqubecloud&logoColor=white"></a>
+  <a href="https://coderabbit.ai"><img alt="Reviewed by CodeRabbit" src="https://img.shields.io/coderabbit/prs/github/storytold/figcraft?style=flat-square&label=Reviewed%20by%20CodeRabbit&logo=coderabbit"></a>
 </p>
 
 <p align="center">
@@ -62,7 +65,7 @@
   <tr>
     <td width="25%" valign="top">
       <h3>🎛️ Familiar by design</h3>
-      The toolbar, layers panel, Design panel, menus and shortcuts sit where your hands expect them. If you know Figma, you already know FigCraft.
+      The toolbar, layers panel, Design panel, menus and shortcuts sit right where your hands expect them.
     </td>
     <td width="25%" valign="top">
       <h3>⚡ Native and fast</h3>
@@ -227,8 +230,8 @@ The desktop app also offers a loopback-only control channel (`figcraft --control
 - **Its own renderer:** tiny-skia on every core for the canvas and exports, with layer blending, effects and masks; booleans from linesweeper, geometry from kurbo, text from skrifa and HarfRust.
 - **Runs in the browser:** the whole engine and UI compile to WebAssembly.
 - **Accessible:** screen readers get names, roles, values and states for the tools, layer rows, fields, dropdowns, tabs and menus (AccessKit on desktop), F6 moves the keyboard between the toolbar, layers, canvas and properties (Tab within them, Escape back to the canvas), the system's reduce-motion setting is honoured, and panel text meets WCAG AA contrast in both themes.
-- **Languages:** English, Russian and Turkish (reviewed by native speakers), and Spanish, French, German, Brazilian Portuguese, Japanese, Korean, Simplified Chinese, Czech and Indonesian drafts, picked in Preferences or taken from the system or browser and switched live; adding a language is one catalog file ([`docs/translating.md`](docs/translating.md)).
-- **Plugins:** sandboxed WebAssembly plugins (a metered, pure-Rust interpreter with a memory cap and no file or network access, in the browser too) that act through the same commands, each run one undo step, within the permissions their manifest asks for. A Rust SDK and two example plugins are in [`plugins/`](plugins); see [`docs/plugins.md`](docs/plugins.md).
+- **Languages:** English, Russian and Turkish (reviewed by native speakers), and Spanish, French, German, Brazilian Portuguese, Japanese, Korean, Simplified Chinese, Czech, Indonesian and Georgian drafts, picked in Preferences or taken from the system or browser and switched live; adding a language is one catalog file ([`docs/translating.md`](docs/translating.md)).
+- **Plugins:** sandboxed WebAssembly plugins (a metered, pure-Rust interpreter with a memory cap and no file or network access, in the browser too) that act through the same commands, each run one undo step, within the permissions their manifest asks for. A Rust SDK and three example plugins are in [`plugins/`](plugins); see [`docs/plugins.md`](docs/plugins.md).
 - **Live sessions (preview):** share the open file from the app (Share ▸ Start sharing: online through a server, or on your local network), give the others the short join code it shows (or the invite link), and edit it together: everyone's changes sync live, with cursors, selections, avatars and follow, and undo takes back only your own changes. Others join from the desktop app (invite links open it) or from the browser build. See [`docs/collab-protocol.md`](docs/collab-protocol.md).
 - **A server of your own (preview):** `figcraft-server` keeps a team's files, publishes them from the app (File ▸ Publish to server…, or Share ▸ Online with your server in Preferences) and hands out share links and join codes that let people edit or only view; files survive restarts and apps reconnect where they were. No accounts yet: links are the access. Releases ship it for Linux, and the desktop app joins over `wss://`; [hosting it on a rented Linux server](docs/server.md#deploy-on-a-linux-server) takes a systemd unit and Caddy or nginx (or Docker). See [`docs/server.md`](docs/server.md).
 - **Never crashes:** no `unwrap`, `expect` or `panic` in shipped code, enforced by clippy; commands run behind a guard so a bug fails one action, not your session.
@@ -262,7 +265,7 @@ New contributors and AI agents: start with [`AGENTS.md`](AGENTS.md), then [`docs
 Installers for macOS (universal, signed and notarized), Windows (x64, x86 and arm64), Linux (AppImage, `.deb`, `.rpm`, Flatpak and tarball), FreeBSD and the web are attached to each [GitHub release](https://github.com/storytold/figcraft/releases). Maintainers: [`docs/releasing.md`](docs/releasing.md) explains how releases are built, signed and published.
 
 > [!IMPORTANT]
-> **Status:** FigCraft is in **alpha**: about 49% of the way to replacing Figma for real work, by our own estimate. Nearly all of Figma's main menu is wired ([`docs/parity-checklist.md`](docs/parity-checklist.md)) and the core editor works end to end, but FigCraft opens `.fig` files only best effort, has only a first preview of multiplayer (live sessions hosted from the app or a self-hosted server, with per-person undo and share links to edit or to view; no accounts, teams or cloud yet), runs its own WebAssembly plugins rather than Figma's, and hasn't been checked against real Figma documents. The honest, area-by-area picture is in the [roadmap](ROADMAP.md) and [`docs/target-app-parity.md`](docs/target-app-parity.md). Expect rough edges and please file issues, or tell us what broke on [Discord](https://discord.gg/artcraft).
+> **Status:** FigCraft is in **alpha**: about 49% of the way to replacing proprietary tools for real work, by our own estimate. Nearly all tracked interface design actions in the menu checklist are wired ([`docs/parity-checklist.md`](docs/parity-checklist.md)) and the core editor works end to end, but FigCraft opens `.fig` files only best effort, has only a first preview of multiplayer (live sessions hosted from the app or a self-hosted server, with per-person undo and share links to edit or to view; no accounts, teams or cloud yet), runs its own WebAssembly plugins, and hasn't been checked against real design documents. The honest, area-by-area picture is in the [roadmap](ROADMAP.md) and [`docs/target-app-parity.md`](docs/target-app-parity.md). Expect rough edges and please file issues, or tell us what broke on [Discord](https://discord.gg/artcraft).
 
 ## Privacy and online sharing
 
@@ -348,8 +351,6 @@ ArtCraft Team and are not covered by this license. They may be used only unmodif
 part of this repository and FigCraft, under [`docs/brand/LICENSE-brand.txt`](docs/brand/LICENSE-brand.txt).
 Forks and modified versions must remove them.
 
-<sub>Figma is a trademark of Figma, Inc. FigCraft is an independent, open-source project and is not affiliated with, sponsored by or endorsed by Figma, Inc.; the name is used only to describe the workflows FigCraft is compatible with.</sub>
-
 <p align="center">
   <a href="https://getartcraft.com/"><img alt="ArtCraft" src="https://raw.githubusercontent.com/storytold/vectorcraft/main/docs/brand/artcraft-mark.png" width="28"></a><br>
   <sub>Made by the <a href="https://getartcraft.com/">ArtCraft</a> team and community.</sub>

ROADMAP.md

@@ -2,7 +2,7 @@
 
 **Stage: alpha** · next: beta, ~26 points and ~162–292 h away (one Opus 5.5 agent; ~33–67 h wall-clock with 5 agents)
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-15 · **Change:** minor (Typography spacing icons support scrubbing (#373); system theme on first run; recent files as cards with thumbnails on the home screen; community fixes: lost images reported on loading (#207), SVG import budgets (#190), Leptos code (#223), full screen (#227), server snapshots readable again (#188), owner-only preferences (#200), ruzstd 0.9.1 (#182), layer cycle repair (#205), batch rollback, Direct3D 12 on Windows, plugin metering (#192); vector edit mode regions: hover hatch, selection and drag; SVG/PDF exports refuse over-depth documents (#208); bounded MCP/control framing, connections and queues (#201); plugin log limits (#191); live-session revert guard (#198); attached MCP no longer replays after a lost reply (#194); repeat command recursion fix; the Layout panel's constrain-proportions link scales the other side, #220; core editor leftovers: component playground, auto gap handles, variables inside styles, inner shadows and background blur on groups, command-made text readable on dark pages, a one-step frame/group convert, delays on mouse triggers and manual overlay offsets, wrapped-line alignment; `.fig` export: instance sizes, variables with modes, shared styles, variable-width strokes; starter templates, a Templates tab and Getting started tips on the home screen; your online files; everyday editing partials: number fields, outline options, Hide when publishing, cursors, panel widths, dark pages; sharing with a join code; text box sizes measured against documents re-saved by other software; live sessions per document; .fig export checked by opening written files in other software; a public figcraft-server: open hosting, owner tokens, per-address limits, idle expiry, moderation, install.sh; experimental .fig export; keyboard shortcut parity suite and bindings; Simplified Chinese draft catalog; Latin American Spanish overlay; prototyping tail: gamepad triggers, widgets in prototypes, mode lookups; plugin directory on figcraft-server; Japanese and Korean draft catalogs and CJK UI fonts; plugin widgets and the plugin panel tail; French, German and Brazilian Portuguese draft catalogs; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, best effort; Windows QA pass with eight fixes; auto layout behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; localization layer with a draft Spanish catalog; hosting figcraft-server: wss in the desktop app, server releases, deployment guide; plugin panels and settings; canvas fixes: boolean hit testing on the result, group drags, frame outlines and slices; code connect; stretch and scatter brushes, pen pressure; text on a path and pattern fills; team libraries on the server and swap library; branches: create, update from main, review and merge; animated GIF fills and TIFF images; Open recent, outlines for the selection and mask outlines: menu breadth 100%; extended collections, variables import/export, gradient stop and variant bindings; feature breadth ~80%; ready ~49%) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-17 · **Change:** minor (community batch #753: Selection colors, smart-selection spacing, a Present tab; language table re-measured from the catalogs; community fixes from #524 up (55 PRs: `.fig` import fidelity, paste from other apps, the Actions palette, editor fixes, server limits) and a boolean-op crash guard; number variables in the text content picker (#629); frames and sections convert into each other (#719); bounded canvas pan overscan; community fixes from #478 up and a control-channel fix (#589); bounded canvas pan overscan; Typography spacing icons support scrubbing (#373); font scans skip named pipes; system theme on first run; recent files as cards with thumbnails on the home screen; community fixes: lost images reported on loading (#207), SVG import budgets (#190), Leptos code (#223), full screen (#227), server snapshots readable again (#188), owner-only preferences (#200), ruzstd 0.9.1 (#182), layer cycle repair (#205), batch rollback, Direct3D 12 on Windows, plugin metering (#192); vector edit mode regions: hover hatch, selection and drag; SVG/PDF exports refuse over-depth documents (#208); bounded MCP/control framing, connections and queues (#201); plugin log limits (#191); live-session revert guard (#198); attached MCP no longer replays after a lost reply (#194); repeat command recursion fix; the Layout panel's constrain-proportions link scales the other side, #220; core editor leftovers: component playground, auto gap handles, variables inside styles, inner shadows and background blur on groups, command-made text readable on dark pages, a one-step frame/group convert, delays on mouse triggers and manual overlay offsets, wrapped-line alignment; `.fig` export: instance sizes, variables with modes, shared styles, variable-width strokes; starter templates, a Templates tab and Getting started tips on the home screen; your online files; everyday editing partials: number fields, outline options, Hide when publishing, cursors, panel widths, dark pages; sharing with a join code; text box sizes measured against documents re-saved by other software; live sessions per document; .fig export checked by opening written files in other software; a public figcraft-server: open hosting, owner tokens, per-address limits, idle expiry, moderation, install.sh; experimental .fig export; keyboard shortcut parity suite and bindings; Simplified Chinese draft catalog; Latin American Spanish overlay; prototyping tail: gamepad triggers, widgets in prototypes, mode lookups; plugin directory on figcraft-server; Japanese and Korean draft catalogs and CJK UI fonts; plugin widgets and the plugin panel tail; French, German and Brazilian Portuguese draft catalogs; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, best effort; Windows QA pass with eight fixes; auto layout behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; localization layer with a draft Spanish catalog; hosting figcraft-server: wss in the desktop app, server releases, deployment guide; plugin panels and settings; canvas fixes: boolean hit testing on the result, group drags, frame outlines and slices; code connect; stretch and scatter brushes, pen pressure; text on a path and pattern fills; team libraries on the server and swap library; branches: create, update from main, review and merge; animated GIF fills and TIFF images; Open recent, outlines for the selection and mask outlines: menu breadth 100%; extended collections, variables import/export, gradient stop and variant bindings; feature breadth ~80%; ready ~49%) · **Target:** Figma Design (desktop app 126.10.7)
 
 FigCraft is a clean-room, open-source, pure-Rust reimplementation of the Figma design workflow,
 native on macOS, Windows, Linux and FreeBSD and in the browser, fully drivable by agents through
@@ -13,7 +13,7 @@ start with [`docs/gaps.md`](docs/gaps.md).
 
 | | Value | Kind |
 |---|---|---|
-| Menu/command breadth | **100%** (211 / 211) | measured, [`docs/parity-checklist.md`](docs/parity-checklist.md) (`cargo xtask parity`) |
+| Menu/command breadth | **100%** (212 / 212) | measured, [`docs/parity-checklist.md`](docs/parity-checklist.md) (`cargo xtask parity`) |
 | Feature breadth | **~85%** (core editor ~94%) | estimated, [`docs/target-app-parity.md`](docs/target-app-parity.md) |
 | Ready for real work | **~53%** | estimated, same doc (written dimension weights and scores) |
 | Essentials user | **~59%** | estimated: core features 77.8% × 0.92 launch/stability × 0.94 discoverability × 0.88 opening files people send ([method](docs/target-app-parity.md#essentials-user)) |
@@ -99,25 +99,25 @@ native speakers' reviews of the six language drafts need people.
 | Language | Code | Strings | Status |
 |---|---|---|---|
 | English | en | 100% | full |
-| Simplified Chinese | zh-Hans | 100% | draft (needs native review) |
-| Spanish | es, es-419 | 100% (es-419: an overlay of 98 entries) | draft (needs native review) |
+| Simplified Chinese | zh-Hans | 95% | draft (needs native review) |
+| Spanish | es, es-419 | 100% (es-419: an overlay of 101 entries) | draft (needs native review) |
 | Hindi | hi | 0% | none |
 | Arabic | ar | 0% | none |
-| French | fr | 100% | draft (needs native review) |
-| Portuguese (Brazil) | pt-BR | 100% | draft (needs native review) |
-| Indonesian | id | 0% | none |
-| Japanese | ja | 100% | draft (needs native review) |
-| German | de | 100% | draft (needs native review) |
-| Korean | ko | 100% | draft (needs native review) |
+| French | fr | 95% | draft (needs native review) |
+| Portuguese (Brazil) | pt-BR | 95% | draft (needs native review) |
+| Indonesian | id | 99% | draft (needs native review) |
+| Japanese | ja | 99% | draft (needs native review) |
+| German | de | 96% | draft (needs native review) |
+| Korean | ko | 95% | draft (needs native review) |
 | Vietnamese | vi | 0% | none |
 
-Also shipped: Swedish (`sv`: every UI string, 120 of 588 command labels and menu wordings; native review welcome). Figma ships English, Japanese, Korean, French, German, Spanish and Portuguese
+Percentages measured 2026-10-17 over 2,272 entries (strings added since a draft show English). Also shipped: Russian (`ru`, 99%, reviewed by VanTan), Swedish (`sv`, 99.6%, command labels since 2026-10-17; native review welcome), Turkish (`tr`, 99%) and Czech (`cs`, 99%, draft). Figma ships English, Japanese, Korean, French, German, Spanish and Portuguese
 (Brazil); FigCraft has the localization layer, English and Spanish (Spain and Latin America),
-French, German, Brazilian Portuguese, Japanese, Korean and Simplified Chinese drafts (Preferences ▸
+French, German, Brazilian Portuguese, Japanese, Korean, Simplified Chinese and Indonesian drafts (Preferences ▸
 Language; Traditional Chinese has no catalog; CJK UI
 text uses an installed CJK font, loaded only when needed; adding a language:
 [`docs/translating.md`](docs/translating.md)). Document text in any script (bidi, Arabic shaping,
-IME) already works. Detail: [`docs/localization-parity.md`](docs/localization-parity.md).
+IME) already works (macOS IME composition fixed for #747, not yet checked on a Mac). Detail: [`docs/localization-parity.md`](docs/localization-parity.md).
 
 ## Upcoming
 
@@ -131,6 +131,9 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
 
 ## Progress log
 
+- **2026-10-17** · Control channel while the window is minimised (M8, #720): a minimised or covered window answers every request that acts on the app's state (edits, `ui.inspect`, `ui.pointer`, `ui.key`, `ui.type`, `ui.set`, `app.quit`…) without drawing, and what needs a drawn frame (`ui.screenshot`, `ui.input`, `window.new`) is an error at once; before, those waited up to 60 s and held up every later request on the connection (an attached agent's `inspect_ui` or window screenshot stalled until the window came back). Measured on Windows 11, minimised: requests ~100 ms each (eframe wakes a minimised window at most ten times a second; ~2 ms on screen), a window screenshot fails in ~100 ms instead of 60 s, idle CPU 0. Numbers unchanged.
+- **2026-10-17** · Number variables on text content (M3, #629): the Typography section's variable picker also lists number variables for a text layer's content, as the engine already accepted (the text shows the number, e.g. 42.5, and follows the variable). Other text fields keep their own types. Numbers unchanged.
+- **2026-10-17** · Frames and sections convert into each other (M1, #719): `object.convertToSection` turns a frame on the page or in a section into a section in place (same box, name, fill and layers, which stay where they are; what only a frame has goes: auto layout, clipping, layout grids, guides, scrolling), and `object.convertToFrame` now also turns a section into a frame that keeps its fill and doesn't clip, so the look stays. Nested frames, instances, main components and sections holding sections are refused with the reason; one undo step each. Both are in the canvas context menu (Convert to section / Convert to frame) and in Spanish. Numbers unchanged.
 - **2026-10-14** · Corner handles win over the corner-radius handles (M1, #292): a press on the inner half of a corner handle's square picked the radius handle 10 px in, so the drag neither resized nor (dragging outward) rounded anything. Inside the drawn square the corner now resizes both sides (in ratio with Shift or the link); further in the radius handle still answers. Regression test in the transform behaviour suite. Numbers unchanged.
 - **2026-10-14** · Home screen recent files as cards (M7): each card shows the picture its file carries on its first page's colour, the file's icon, name and "Edited ... ago"; sort by name, creation or last change either way; a table view; a click selects, a double-click or Enter opens, arrow keys move; Open, Show in folder and Remove from recents on right-click. Numbers unchanged.
 - **2026-10-13** · Vector edit mode regions (M4): with the Move tool, the filled area under the pointer is hatched with "/" lines in the selection colour, clipped by the area's own fill rule so holes stay clear; the hatch goes near points (3.5 px) and segments (2 px), and its spacing follows octave folding (8 px at every power-of-two zoom), fixed to the shape. A click selects the area with its points (they move with it but keep the unselected look), Shift adds or removes one, a press on a selected area drags the whole selection as one undo step, and a click on an empty spot clears the areas and stays in edit mode. `vector.edit.select {regions}` and `vector.edit.state` (`regions`, `regionVertices`, `regionHover`); `vector_regions_tests` and `regions_tests`. Numbers unchanged.
@@ -313,6 +316,21 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-20 | minor | A document dropped on the canvas opens (#916): a `.figcraft`, `.fig` or file JSON dropped on the canvas opens as a file of its own, as on the home screen, in the browser too; it used to add its pages to the file in front. Images and SVG still import at the drop point, File ▸ Import still adds pages, and dragging only documents over the canvas says "Drop to open" (not in the browser, which names no file until the drop). Numbers unchanged |
+| 2026-10-20 | minor | Duplicating a main component makes an instance (#892): Duplicate and Alt-drag copied a main component as a second main; within its file the copy is now an instance of it, as Copy then Paste already was (a variant duplicated in its set stays a variant). Numbers unchanged. |
+| 2026-10-20 | minor | Readable disabled and selected text (#890): the dim text colour (disabled buttons, placeholders, hints) is at least 3:1 against panels, fields and selected rows in both themes (it was 2.1:1 in the light theme), a disabled button is grey with that text instead of fading to 40%, and selected text (renaming a page or layer, any text box) takes the theme's readable green on the highlight (1.4:1 in the dark theme before, now 4.2:1 or more); checked with the colour contrast helper (`theme::tests`). Numbers unchanged |
+| 2026-10-20 | minor | Layer data reads back (#879): `node.get` (the command, the control method and MCP `get_node`) and `document.inspect` report a layer's or page's `pluginData` as `{key: value}` when it has any, so a tool that keeps state in a file with `node.set {props: {pluginData}}` can read it on its next run (`plugin_data_tests`). Numbers unchanged |
+| 2026-10-20 | minor | Measuring while nudging (#894): with Alt held over another layer, the arrows nudge the selection (Shift: the big step) and the distances follow every nudge (Alt+arrows used to do nothing); while measuring, the selection's handles and size label hide and both layers keep their outlines (`measure_nudge_tests`). Numbers unchanged |
+| 2026-10-20 | minor | Release fonts (#885): the web release embeds craft-fonts again (Inter), so the browser version draws text and lists fonts; it had none since releases moved to the shared workflow. The craft-fonts pin goes back to the commit with the Latin manifest (the Georgian change had moved it to one without Inter, which would have failed the next release). Numbers unchanged. |
+| 2026-10-17 | minor | Community batch #753 (10 PRs): Selection colors for mixed selections (#403); smart-selection spacing fields and canvas handles (#402); a Present tab with device and scale controls (#537); adding auto layout to an empty frame keeps its size (#369); `node.set` applies auto layout keys to frames only and warns about font styles a family lacks (#603); canvas images on whole device pixels (#359); Adwaita window controls on Wayland without server decorations (#592, not run on GNOME or KDE by the maintainers); the keyboard shortcuts panel closes on the home screen (#548); macOS paste modifiers in tests (#750); credits column tests (#347). `cargo xtask parity` re-run: 212 / 212 menu items (100%; the catalog gained View ▸ Full screen with #227 on 2026-10-14), 561 commands. Language table re-measured from the catalogs (2,272 entries): the drafts read 95–99% (strings added since 2026-10-12 show English), Indonesian has a draft (99%; it read none), and Russian, Swedish (its command labels from #599), Turkish and Czech are listed with their counts. Per-area parity rows for the day's landings in `docs/gaps.md`, `target-app-parity.md` and the area docs. Numbers unchanged |
+| 2026-10-17 | minor | Control channel while the window is minimised (M8, #720): a minimised or covered window answers every request that acts on the app's state (edits, `ui.inspect`, `ui.pointer`, `ui.key`, `ui.type`, `ui.set`, `app.quit`…) without drawing, and what needs a drawn frame (`ui.screenshot`, `ui.input`, `window.new`) is an error at once; before, those waited up to 60 s and held up every later request on the connection (an attached agent's `inspect_ui` or window screenshot stalled until the window came back). Measured on Windows 11, minimised: requests ~100 ms each (eframe wakes a minimised window at most ten times a second; ~2 ms on screen), a window screenshot fails in ~100 ms instead of 60 s, idle CPU 0. Numbers unchanged. |
+| 2026-10-17 | minor | Community fixes from #524 up (batches #727, #728, #733, #735, #736 and #729; 55 PRs) and a crash guard. `.fig` import: explicit instance identity, overrides by key, text style precedence, grid track sizes, slot content, connector labels, skip ink, paragraph options and hanging lists, list start numbers, vertical trim, per-point stroke joins, text on a path, image adjustments and embedded images; large files open within budgets from the file's own size; an import report after opening; imported bytes stay out of the command journal. Files and paste: save a copy as `.fig`; Cmd/Ctrl+V pastes images copied in other apps and layers copied from another design app (`edit.pasteDesignLayers`); paste over and paste properties; clipboard reads on Linux and the BSDs time out after 2 s. Editor: live font preview on hover; Shift+I and Resources open Assets; Shift-drag moves the selection; thin strokes take a nearby double-click; dropped points merge; Flatten keeps open paths; the Actions palette gets tabs, ranked search, a keyboard highlight and recents; the colour picker opens on a new fill or stroke; text strokes follow their alignment; selection highlights after line breaks; a draggable pages/layers divider; variant properties reorder by drag; submenus keep their hover with a safe triangle; menu actions that need a value ask for it; File ▸ Rename edits the name in place. Engine: bad paint indexes, non-finite geometry and pages in copy/cut are refused; a param naming a layer says so when it isn't one; a CLI script is one undo step and resolves `$step`. Server and collaboration: message limits follow `max_file_mb` (client capped at 1 GiB); a damaged generation field no longer drops flushed edits; the web build joins a session from a `#join=` link. Also Swedish command labels, Nix CI through the shared workflow, paint bounds once per render, and a guard that turns a panic inside the boolean-op library into bad input (the stroke draws unclipped). Numbers unchanged. |
+| 2026-10-17 | minor | Number variables on text content (M3, #629): the Typography section's variable picker also lists number variables for a text layer's content, as the engine already accepted (the text shows the number, e.g. 42.5, and follows the variable). Other text fields keep their own types. Numbers unchanged. |
+| 2026-10-17 | minor | Frames and sections convert into each other (M1, #719): `object.convertToSection` turns a frame on the page or in a section into a section in place (same box, name, fill and layers, which stay where they are; what only a frame has goes: auto layout, clipping, layout grids, guides, scrolling), and `object.convertToFrame` now also turns a section into a frame that keeps its fill and doesn't clip, so the look stays. Nested frames, instances, main components and sections holding sections are refused with the reason; one undo step each. Both are in the canvas context menu (Convert to section / Convert to frame) and in Spanish. Numbers unchanged. |
+| 2026-10-16 | minor | Community fixes from #478 up (batches #591, #598, #602; 69 PRs) and a control-channel fix: a line that isn't JSON now ends a `--control` connection, so a web page can't drive the app through a browser request (#589). Highlights: page copies keep navigation, flows, prototype settings and guides; Find and Replace keeps line endings and case-insensitive matches; text hyperlinks survive import and export; recent colours record only what was picked; MCP screenshots respect `maxSize`; Swedish catalog (UI strings), Czech plurals; bounded canvas overscan while panning; Korean fallback at the run's weight; many vector-edit, guide, page and .fig round-trip fixes. Numbers unchanged |
+| 2026-10-15 | minor | Drop files anywhere to open them (M7): dragging files over the window shows a "Drop to open" (home) or "Drop to import" (canvas) overlay. On the home screen each supported file opens as a document of its own and other files are turned away with a toast; on the canvas the files import at the drop point. Both wait behind a small card that is on screen before a large file blocks the window. A canvas import stays with the document and page that received the drop even if the tab or page changes meanwhile, and is cancelled with a message if that document or page is gone. Numbers unchanged. |
+| 2026-10-15 | minor | M7: system font discovery skips entries observed as non-regular files before opening them, avoiding the reproduced named-pipe stall. Regular-file symlinks remain supported; directory depth, font limits and priorities are unchanged. Numbers unchanged. |
+| 2026-10-15 | minor | Canvas retains a bounded margin while panning so newly exposed strips can reuse the previous render. Numbers unchanged. |
 | 2026-10-15 | minor | Typography spacing icons scrub with the shared number-field gesture, modifier rates and one Undo step per drag (#373). Units and selected-character targeting are preserved. Numbers unchanged. |
 | 2026-10-14 | minor | System theme on first run (M7): preferences without a theme default to System; the first frame reads the OS appearance directly, including when returning from a manual theme. Saved Light/Dark choices stay explicit; unavailable OS appearance falls back to Light. Numbers unchanged. |
 | 2026-10-14 | minor | Home screen recent files as cards (M7): each card shows the picture its file carries on its first page's colour, the file's icon, name and "Edited ... ago"; sort by name, creation or last change either way; a table view; a click selects, a double-click or Enter opens, arrow keys move; Open, Show in folder and Remove from recents on right-click. Numbers unchanged. |

apps/figcraft-cli/src/args.rs

@@ -1,5 +1,6 @@
 //! Minimal std-only argument parsing: positionals, `--key value` / `--key=value` / `-o value`
-//! options, and boolean `--flag`s. Unknown options are usage errors.
+//! options (given again: the last counts, or all with [`Args::values`]), and boolean `--flag`s.
+//! Unknown options are usage errors.
 
 use std::collections::BTreeMap;
 
@@ -8,7 +9,7 @@ use crate::{CliError, CliResult};
 #[derive(Debug, Default)]
 pub struct Args {
     pub positional: Vec<String>,
-    values: BTreeMap<String, String>,
+    values: BTreeMap<String, Vec<String>>,
     flags: Vec<String>,
 }
 
@@ -34,7 +35,7 @@ impl Args {
                     Some(v) => v,
                     None => it.next().cloned().ok_or_else(|| CliError::Usage(format!("`{arg}` needs a value")))?,
                 };
-                a.values.insert(name.to_string(), v);
+                a.values.entry(name.to_string()).or_default().push(v);
             } else if flags.contains(&name) && inline.is_none() {
                 a.flags.push(name.to_string());
             } else {
@@ -45,7 +46,12 @@ impl Args {
     }
 
     pub fn value(&self, k: &str) -> Option<String> {
-        self.values.get(k).cloned()
+        self.values.get(k).and_then(|v| v.last()).cloned()
+    }
+
+    /// Every value of an option that may be given more than once, in order.
+    pub fn values(&self, k: &str) -> &[String] {
+        self.values.get(k).map_or(&[], Vec::as_slice)
     }
 
     pub fn flag(&self, k: &str) -> bool {
@@ -62,9 +68,9 @@ impl Args {
     /// PDF print options: `--bleed LENGTH` (points, or "3mm", "0.125in"), `--crop-marks`,
     /// `--bleed-marks`, `--cmyk`.
     pub fn print(&self) -> CliResult<figcraft_doc::PrintSettings> {
-        let bleed = match self.values.get("bleed") {
+        let bleed = match self.value("bleed") {
             None => 0.0,
-            Some(s) => figcraft_doc::PrintSettings::parse_length(s)
+            Some(s) => figcraft_doc::PrintSettings::parse_length(&s)
                 .filter(|b| *b <= figcraft_doc::PrintSettings::MAX_BLEED)
                 .ok_or_else(|| CliError::Usage(format!("--bleed takes points or a length like 3mm or 0.125in (up to 2in), got `{s}`")))?,
         };
@@ -72,7 +78,7 @@ impl Args {
     }
 
     pub fn scale(&self) -> CliResult<f64> {
-        match self.values.get("scale") {
+        match self.value("scale") {
             None => Ok(1.0),
             Some(s) => s
                 .trim_end_matches('x')
@@ -85,7 +91,7 @@ impl Args {
 
     /// A comma-separated list of whole numbers (`--layers 1000,10_000`).
     pub fn usizes(&self, k: &str, default: &[usize]) -> CliResult<Vec<usize>> {
-        match self.values.get(k) {
+        match self.value(k) {
             None => Ok(default.to_vec()),
             Some(s) => s
                 .split(',')
@@ -110,6 +116,10 @@ mod tests {
         assert_eq!(a.value("o").as_deref(), Some("out"));
         assert_eq!(a.scale().unwrap(), 2.0);
         assert!(a.flag("json"));
+        let a = Args::parse(&v(&["--root", "a", "--root=b"]), &["root"], &[]).unwrap();
+        assert_eq!(a.values("root"), ["a", "b"]);
+        assert_eq!(a.value("root").as_deref(), Some("b"));
+        assert!(a.values("none").is_empty());
     }
 
     #[test]

apps/figcraft-cli/src/files.rs

@@ -29,9 +29,20 @@ fn image_format(e: &str) -> Option<ExportFormat> {
     }
 }
 
+/// Writes through [`figcraft_engine::file_access`] when automation roots are in force, so a
+/// confined run can only write inside a write root (#833).
+///
+/// Unconfined it writes with `std::fs::write`, as it always did. `file_access::write` stages the
+/// bytes and renames them into place, which **replaces** a symbolic link at `path` instead of
+/// writing through it to its target -- a change of behaviour for anyone whose output path is a
+/// link, and nothing to do with confinement. Inside a root the staged write is the right one:
+/// `Roots::check` has already refused a link that leads out of the root.
 fn write(path: &str, bytes: &[u8]) -> CliResult<()> {
     if let Some(dir) = Path::new(path).parent().filter(|d| !d.as_os_str().is_empty()) {
-        std::fs::create_dir_all(dir).map_err(|e| CliError::Failed(format!("{}: {e}", dir.display())))?;
+        figcraft_engine::file_access::create_dir_all(dir).map_err(|e| CliError::Failed(e.to_string()))?;
+    }
+    if figcraft_engine::file_access::current().is_some() {
+        return figcraft_engine::file_access::write(path, bytes).map_err(|e| CliError::Failed(e.to_string()));
     }
     std::fs::write(path, bytes).map_err(|e| CliError::Failed(format!("{path}: {e}")))
 }
@@ -155,6 +166,7 @@ pub fn info(path: &str, as_json: bool) -> CliResult<ExitCode> {
             Some(json!({"id": p, "name": pn.name, "nodes": nodes, "topLevel": pn.children.len(), "frames": frames}))
         })
         .collect();
+    let missing = figcraft_engine::fonts::missing(&doc);
     let v = json!({
         "file": path,
         "name": doc.name,
@@ -164,6 +176,7 @@ pub fn info(path: &str, as_json: bool) -> CliResult<ExitCode> {
         "variables": doc.variables.variables.len(),
         "images": doc.images.len(),
         "notes": notes,
+        "missingFonts": missing.iter().map(|m| json!({"family": m.family, "layers": m.layers})).collect::<Vec<_>>(),
     });
     if as_json {
         println!("{}", serde_json::to_string_pretty(&v).unwrap_or_default());
@@ -187,6 +200,10 @@ pub fn info(path: &str, as_json: bool) -> CliResult<ExitCode> {
             println!("  {} {} \"{}\" {}×{}", f["id"], f["type"].as_str().unwrap_or(""), f["name"].as_str().unwrap_or(""), f["width"], f["height"]);
         }
     }
+    for m in &missing {
+        let layers = if m.layers == 1 { "text layer" } else { "text layers" };
+        println!("missing font \"{}\": {} {layers} (drawn in a fallback font)", m.family, m.layers);
+    }
     Ok(ExitCode::SUCCESS)
 }
 
@@ -238,7 +255,7 @@ pub fn export(file: &str, out: &str, t: &Target) -> CliResult<ExitCode> {
         println!("{out}");
         return Ok(ExitCode::SUCCESS);
     }
-    std::fs::create_dir_all(out).map_err(|e| CliError::Failed(format!("{out}: {e}")))?;
+    figcraft_engine::file_access::create_dir_all(out).map_err(|e| CliError::Failed(e.to_string()))?;
     let ids = match target {
         Some(t) => vec![t],
         None => {
@@ -323,7 +340,8 @@ pub fn parse_script(text: &str) -> Result<Vec<(String, Value)>, String> {
 }
 
 pub fn run_script(script: &str, input: Option<&str>, out: Option<&str>) -> CliResult<ExitCode> {
-    let text = std::fs::read_to_string(script).map_err(|e| CliError::Failed(format!("{script}: {e}")))?;
+    let bytes = figcraft_engine::file_access::read(script).map_err(|e| CliError::Failed(e.to_string()))?;
+    let text = String::from_utf8(bytes).map_err(|_| CliError::Failed(format!("{script}: not UTF-8")))?;
     let steps = parse_script(&text).map_err(|e| CliError::Failed(format!("{script}: {e}")))?;
     let mut s = match input {
         Some(path) => {
@@ -333,17 +351,32 @@ pub fn run_script(script: &str, input: Option<&str>, out: Option<&str>) -> CliRe
         }
         None => Session::new(),
     };
-    for (i, (cmd, params)) in steps.iter().enumerate() {
-        let r = s.execute(cmd, params);
-        s.ui_requests.clear();
-        match r {
-            Ok(v) => println!("{}", json!({"step": i, "command": cmd, "ok": true, "result": v})),
-            Err(e) => {
-                println!("{}", json!({"step": i, "command": cmd, "ok": false, "error": e.to_string()}));
-                eprintln!("error: step {i} ({cmd}) failed: {e}");
-                return Ok(ExitCode::from(1));
-            }
+    // One undo step and all-or-nothing, the way the same commands behave through `command.batch`
+    // (MCP, the control channel, plugins): `{"$step": n}` resolves against the steps before it, and
+    // a step that fails takes the whole script back instead of leaving the earlier steps applied.
+    // The result lines are held back until the script is through, so none of them reports work that
+    // was rolled back.
+    let mut results: Vec<Value> = Vec::with_capacity(steps.len());
+    let mut failed_at = 0;
+    let outcome = s.grouped(&format!("run {script}"), |s| {
+        for (i, (cmd, params)) in steps.iter().enumerate() {
+            failed_at = i;
+            let v = s.batch_step(&results, i, cmd, params)?;
+            s.ui_requests.clear();
+            results.push(v);
         }
+        Ok(())
+    });
+    if let Err(e) = outcome {
+        let cmd = steps.get(failed_at).map_or("", |(cmd, _)| cmd.as_str());
+        let i = failed_at;
+        println!("{}", json!({"step": i, "command": cmd, "ok": false, "error": e.to_string(), "rolledBack": true}));
+        eprintln!("error: step {i} ({cmd}) failed: {e}");
+        eprintln!("the script's document changes were rolled back");
+        return Ok(ExitCode::from(1));
+    }
+    for (i, ((cmd, _), v)) in steps.iter().zip(&results).enumerate() {
+        println!("{}", json!({"step": i, "command": cmd, "ok": true, "result": v}));
     }
     if let Some(out) = out {
         let ds = s.ds().map_err(|e| CliError::Failed(e.to_string()))?;
@@ -422,4 +455,62 @@ mod tests {
         assert_eq!(std::fs::read_dir(&dir).unwrap().count(), 2);
         std::fs::remove_dir_all(dir).unwrap();
     }
+
+    fn temp_dir(tag: &str) -> std::path::PathBuf {
+        let stamp = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_nanos();
+        let dir = std::env::temp_dir().join(format!("figcraft-cli-{tag}-{}-{stamp}", std::process::id()));
+        std::fs::create_dir(&dir).unwrap();
+        dir
+    }
+
+    /// A script resolves `{"$step": n}` like the same commands through `command.batch`. Each step
+    /// used to run on its own, so the reference reached `parent` unresolved, `node.create` read it
+    /// as "no parent" and the layer landed on the page — with every step reporting success.
+    #[test]
+    fn a_script_puts_a_layer_in_a_layer_an_earlier_step_made() {
+        let dir = temp_dir("run-step");
+        let script = dir.join("script.json");
+        std::fs::write(
+            &script,
+            r#"[
+                {"command": "node.create", "params": {"type": "frame", "name": "Card", "x": 0, "y": 0, "width": 200, "height": 100}},
+                {"command": "node.create", "params": {"type": "rectangle", "name": "child", "parent": {"$step": 0}, "x": 10, "y": 10, "width": 20, "height": 20}}
+            ]"#,
+        )
+        .unwrap();
+        let out = dir.join("out.figcraft");
+        run_script(script.to_str().unwrap(), None, Some(out.to_str().unwrap())).unwrap();
+
+        let mut s = Session::empty();
+        s.execute("file.open", &json!({"path": out.to_str().unwrap()})).unwrap();
+        let doc = s.doc().unwrap();
+        let page = s.page().unwrap();
+        let top = doc.node(page).unwrap().children.clone();
+        assert_eq!(top.len(), 1, "only the frame is top level, not the rectangle too");
+        assert_eq!(doc.node(top[0]).unwrap().name, "Card");
+        let inner = doc.node(top[0]).unwrap().children.clone();
+        assert_eq!(inner.len(), 1, "the rectangle went inside the frame");
+        assert_eq!(doc.node(inner[0]).unwrap().name, "child");
+        std::fs::remove_dir_all(dir).unwrap();
+    }
+
+    /// A step that fails takes the whole script back: nothing is written, and the failure says so.
+    #[test]
+    fn a_failed_step_leaves_no_output() {
+        let dir = temp_dir("run-rollback");
+        let script = dir.join("script.json");
+        std::fs::write(
+            &script,
+            r#"[
+                {"command": "node.create", "params": {"type": "frame", "name": "Card", "x": 0, "y": 0, "width": 200, "height": 100}},
+                {"command": "node.set", "params": {"ids": [99999], "props": {"name": "nope"}}}
+            ]"#,
+        )
+        .unwrap();
+        let out = dir.join("out.figcraft");
+        // The failure is the script's, not the call's: the CLI reports it and exits non-zero.
+        run_script(script.to_str().unwrap(), None, Some(out.to_str().unwrap())).unwrap();
+        assert!(!out.exists(), "a script that failed writes nothing");
+        std::fs::remove_dir_all(dir).unwrap();
+    }
 }

apps/figcraft-cli/src/main.rs

@@ -22,8 +22,9 @@ USAGE:
   figcraft-cli convert <in> <out>
   figcraft-cli render <file> -o <out.png> [--scale N] [--page NAME]
   figcraft-cli run <script.json|script.jsonl> [--in <file>] [--out <file>]
+  (info, export, convert, render and run also take --automation-read-root DIR / --automation-write-root DIR)
   figcraft-cli commands [--json] [--filter TEXT]
-  figcraft-cli mcp [--attach PORT]
+  figcraft-cli mcp [--attach PORT] [--automation-read-root DIR]... [--automation-write-root DIR]...
   figcraft-cli plugin publish <folder> --server ws://host:port/[?key=KEY]
   figcraft-cli perf [--layers N[,N...]] [--instances N[,N...]]
   figcraft-cli help | --help | --version
@@ -42,8 +43,33 @@ crop and bleed marks, CMYK colour). `run` executes a JSON array (or JSON lines)
 `plugin publish` sends a plugin folder (figcraft-plugin.json, its module, an optional assets/ folder)
 to a figcraft-server's plugin directory as a new version; the server's key comes from the address or
 the FIGCRAFT_SERVER_KEY environment variable (which keeps it out of the shell history).
+`--automation-read-root DIR` / `--automation-write-root DIR` (each may be repeated; the folders
+must exist) confine the files a subcommand touches: reads only inside a read or write root, writes
+only inside a write root, everything else refused -- so giving no write root denies writing
+altogether. They are taken by `mcp`, to confine the agent's commands, and by `info`, `export`,
+`convert`, `render` and `run`, to confine that one run; without them a subcommand reads and writes
+as the user who started it, as before. A running app confines itself: start it with
+`figcraft --control PORT` and the same flags (`--attach` refuses them).
 See docs/cli.md and docs/mcp.md.";
 
+/// The automation roots a file subcommand was given, if any. Omitting both leaves the run
+/// unconfined, as before; giving either confines every file the subcommand touches (#833).
+const ROOT_FLAGS: [&str; 2] = ["automation-read-root", "automation-write-root"];
+
+fn roots_of(a: &Args) -> CliResult<Option<figcraft_engine::file_access::Roots>> {
+    let (read, write) = (a.values("automation-read-root"), a.values("automation-write-root"));
+    if read.is_empty() && write.is_empty() {
+        return Ok(None);
+    }
+    Ok(Some(figcraft_engine::file_access::Roots::new(read, write).map_err(CliError::Failed)?))
+}
+
+/// Runs `f` confined to the roots `a` carries.
+fn confined<R>(a: &Args, f: impl FnOnce() -> CliResult<R>) -> CliResult<R> {
+    let roots = roots_of(a)?.map(std::sync::Arc::new);
+    figcraft_engine::file_access::confined(roots.as_ref(), f)
+}
+
 fn main() -> ExitCode {
     let argv: Vec<String> = std::env::args().skip(1).collect();
     match run(&argv) {
@@ -94,35 +120,38 @@ fn run(argv: &[String]) -> CliResult<ExitCode> {
             Ok(ExitCode::SUCCESS)
         }
         "info" => {
-            let a = Args::parse(rest, &[], &["json"])?;
+            let a = Args::parse(rest, &ROOT_FLAGS, &["json"])?;
             let file = a.one_positional("info <file>")?;
-            files::info(&file, a.flag("json"))
+            confined(&a, || files::info(&file, a.flag("json")))
         }
         "export" => {
-            let a = Args::parse(rest, &["format", "scale", "page", "node", "o", "out", "bleed"], &["crop-marks", "bleed-marks", "cmyk"])?;
+            let valued = [&["format", "scale", "page", "node", "o", "out", "bleed"][..], &ROOT_FLAGS[..]].concat();
+            let a = Args::parse(rest, &valued, &["crop-marks", "bleed-marks", "cmyk"])?;
             let file = a.one_positional("export <file> -o <out>")?;
             let out = a.value("o").or_else(|| a.value("out")).ok_or_else(|| CliError::Usage("export needs -o <out>".into()))?;
             let target =
                 files::Target { format: a.value("format"), scale: a.scale()?, page: a.value("page"), node: a.value("node"), print: a.print()? };
-            files::export(&file, &out, &target)
+            confined(&a, || files::export(&file, &out, &target))
         }
         "convert" => {
-            let a = Args::parse(rest, &[], &[])?;
+            let a = Args::parse(rest, &ROOT_FLAGS, &[])?;
             match a.positional.as_slice() {
-                [i, o] => files::convert(i, o),
+                [i, o] => confined(&a, || files::convert(i, o)),
                 _ => Err(CliError::Usage("convert <in> <out>".into())),
             }
         }
         "render" => {
-            let a = Args::parse(rest, &["o", "out", "scale", "page"], &[])?;
+            let valued = [&["o", "out", "scale", "page"][..], &ROOT_FLAGS[..]].concat();
+            let a = Args::parse(rest, &valued, &[])?;
             let file = a.one_positional("render <file> -o <out.png>")?;
             let out = a.value("o").or_else(|| a.value("out")).ok_or_else(|| CliError::Usage("render needs -o <out.png>".into()))?;
-            files::render(&file, &out, a.scale()?, a.value("page").as_deref())
+            confined(&a, || files::render(&file, &out, a.scale()?, a.value("page").as_deref()))
         }
         "run" => {
-            let a = Args::parse(rest, &["in", "out"], &[])?;
+            let valued = [&["in", "out"][..], &ROOT_FLAGS[..]].concat();
+            let a = Args::parse(rest, &valued, &[])?;
             let script = a.one_positional("run <script.json|.jsonl>")?;
-            files::run_script(&script, a.value("in").as_deref(), a.value("out").as_deref())
+            confined(&a, || files::run_script(&script, a.value("in").as_deref(), a.value("out").as_deref()))
         }
         "commands" => {
             let a = Args::parse(rest, &["filter"], &["json"])?;
@@ -133,11 +162,20 @@ fn run(argv: &[String]) -> CliResult<ExitCode> {
             Ok(ExitCode::SUCCESS)
         }
         "mcp" => {
-            let a = Args::parse(rest, &["attach"], &[])?;
+            let valued = [&["attach"][..], &ROOT_FLAGS[..]].concat();
+            let a = Args::parse(rest, &valued, &[])?;
             if !a.positional.is_empty() {
                 return Err(CliError::Usage("mcp takes no positional arguments".into()));
             }
-            mcp(a.value("attach").as_deref())
+            let attach = a.value("attach");
+            // The app runs the commands: only its own roots can confine them.
+            if attach.is_some() && ROOT_FLAGS.iter().any(|f| !a.values(f).is_empty()) {
+                return Err(CliError::Usage(
+                    "--attach can't take automation roots: start the app with them instead (`figcraft --control PORT --automation-read-root DIR ...`)"
+                        .into(),
+                ));
+            }
+            mcp(attach.as_deref(), roots_of(&a)?)
         }
         "plugin" => {
             let a = Args::parse(rest, &["server"], &[])?;
@@ -205,7 +243,7 @@ fn publish_plugin(folder: &str, server: &str) -> CliResult<ExitCode> {
     Ok(ExitCode::SUCCESS)
 }
 
-fn mcp(attach: Option<&str>) -> CliResult<ExitCode> {
+fn mcp(attach: Option<&str>, roots: Option<figcraft_engine::file_access::Roots>) -> CliResult<ExitCode> {
     let backend: Box<dyn figcraft_mcp::Backend> = match attach {
         Some(p) => {
             let addr = if p.contains(':') {
@@ -220,7 +258,10 @@ fn mcp(attach: Option<&str>) -> CliResult<ExitCode> {
         None => Box::new(figcraft_mcp::Headless::new()),
     };
     eprintln!("figcraft MCP server ({}) on stdio", backend.describe());
-    let mut server = figcraft_mcp::Server::new(backend);
+    if let Some(r) = &roots {
+        eprintln!("file access confined to {}", r.to_json());
+    }
+    let mut server = figcraft_mcp::Server::new(backend).with_roots(roots);
     let stdin = std::io::stdin();
     let stdout = std::io::stdout();
     server.serve(stdin.lock(), stdout.lock()).map_err(|e| format!("stdio: {e}"))?;

apps/figcraft-cli/tests/cli.rs

@@ -25,6 +25,9 @@ fn bad_arguments_exit_2_without_panicking() {
         &["render", "a", "-o"],
         &["perf", "--shapes", "lots"],
         &["mcp", "--attach", "notaport"],
+        // An attached app confines itself: roots go to `figcraft --control`.
+        &["mcp", "--attach", "7979", "--automation-read-root", "."],
+        &["mcp", "--automation-write-root"],
         &["convert", "a"],
     ] {
         let out = bin().args(args).output().unwrap();
@@ -120,9 +123,147 @@ fn mcp_over_stdio() {
     assert_eq!(lines[2]["result"]["isError"], false);
 }
 
+#[test]
+fn mcp_over_stdio_confined_to_automation_roots() {
+    let d = tmp("roots");
+    for sub in ["in", "out", "outside"] {
+        std::fs::create_dir_all(d.join(sub)).unwrap();
+    }
+    let p = |rel: &str| d.join(rel).to_string_lossy().into_owned();
+    // A root that isn't a folder stops the server before it serves.
+    let out = bin().args(["mcp", "--automation-read-root", &p("missing")]).output().unwrap();
+    assert_eq!(out.status.code(), Some(1));
+    assert!(String::from_utf8_lossy(&out.stderr).contains("--automation-read-root"));
+    let mut child = bin()
+        .args(["mcp", "--automation-read-root", &p("in"), "--automation-write-root", &p("out")])
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::null())
+        .spawn()
+        .unwrap();
+    {
+        let stdin = child.stdin.as_mut().unwrap();
+        let call = |id: u32, tool: &str, args: serde_json::Value| {
+            serde_json::json!({"jsonrpc": "2.0", "id": id, "method": "tools/call", "params": {"name": tool, "arguments": args}}).to_string()
+        };
+        writeln!(stdin, r#"{{"jsonrpc":"2.0","id":1,"method":"initialize","params":{{"protocolVersion":"2025-06-18"}}}}"#).unwrap();
+        writeln!(stdin, "{}", call(2, "create_node", serde_json::json!({"type": "ellipse"}))).unwrap();
+        writeln!(stdin, "{}", call(3, "save_file", serde_json::json!({"path": p("outside/a.figcraft")}))).unwrap();
+        writeln!(stdin, "{}", call(4, "save_file", serde_json::json!({"path": p("out/a.figcraft")}))).unwrap();
+        writeln!(stdin, "{}", call(5, "open_file", serde_json::json!({"path": p("outside/a.figcraft")}))).unwrap();
+        writeln!(stdin, "{}", call(6, "open_file", serde_json::json!({"path": p("out/a.figcraft")}))).unwrap();
+    }
+    drop(child.stdin.take());
+    let out = child.wait_with_output().unwrap();
+    assert!(out.status.success());
+    let lines: Vec<serde_json::Value> = String::from_utf8_lossy(&out.stdout).lines().map(|l| serde_json::from_str(l).unwrap()).collect();
+    assert_eq!(lines.len(), 6);
+    assert!(lines[0]["result"]["instructions"].as_str().unwrap().contains("only these folders may be read"));
+    let error = |i: usize| lines[i]["result"]["isError"] == true;
+    assert!(!error(1) && error(2) && !error(3) && error(4) && !error(5), "{lines:?}");
+    assert!(lines[2]["result"]["content"][0]["text"].as_str().unwrap().contains("automation path rejected"));
+    assert!(d.join("out/a.figcraft").is_file() && !d.join("outside/a.figcraft").exists());
+    let _ = std::fs::remove_dir_all(&d);
+}
+
 #[test]
 fn commands_json_lists_everything() {
     let out = bin().args(["commands", "--json"]).output().unwrap();
     let v: serde_json::Value = serde_json::from_slice(&out.stdout).unwrap();
     assert!(v.as_array().unwrap().len() > 200);
 }
+
+/// The automation roots confine the file subcommands too, not just `mcp` (#833): a read outside a
+/// root, and a write outside a write root, are refused and leave no file behind. Without the flags
+/// the same commands behave as they always did.
+#[test]
+fn file_subcommands_are_confined_to_automation_roots() {
+    let d = tmp("file-roots");
+    let _ = std::fs::remove_dir_all(&d);
+    for sub in ["in", "out"] {
+        std::fs::create_dir_all(d.join(sub)).unwrap();
+    }
+    let p = |rel: &str| d.join(rel).to_string_lossy().into_owned();
+    let out_of = |o: &std::process::Output| String::from_utf8_lossy(&o.stderr).into_owned();
+
+    // A document to work on, made unconfined.
+    std::fs::write(d.join("in/make.json"), br#"[{"command":"shape.rectangle","params":{"x":0,"y":0,"width":40,"height":20}}]"#).unwrap();
+    let made = bin().args(["run", &p("in/make.json"), "--out", &p("in/doc.figcraft")]).output().unwrap();
+    assert!(made.status.success(), "{}", out_of(&made));
+
+    // Inside the roots: renders as usual.
+    let ok = bin()
+        .args(["render", &p("in/doc.figcraft"), "-o", &p("out/ok.png"), "--automation-read-root", &p("in"), "--automation-write-root", &p("out")])
+        .output()
+        .unwrap();
+    assert!(ok.status.success(), "{}", out_of(&ok));
+    assert!(d.join("out/ok.png").is_file());
+
+    // A write outside the write root is refused, and nothing is written.
+    let escaped = d.join("escaped.png");
+    let refused = bin()
+        .args([
+            "render",
+            &p("in/doc.figcraft"),
+            "-o",
+            &escaped.to_string_lossy(),
+            "--automation-read-root",
+            &p("in"),
+            "--automation-write-root",
+            &p("out"),
+        ])
+        .output()
+        .unwrap();
+    assert!(!refused.status.success());
+    assert!(out_of(&refused).contains("may be written"), "{}", out_of(&refused));
+    assert!(!escaped.exists(), "the refused render wrote a file anyway");
+
+    // No write root at all: writing is refused outright, reading still works.
+    let no_write = bin().args(["render", &p("in/doc.figcraft"), "-o", &p("out/no.png"), "--automation-read-root", &p("in")]).output().unwrap();
+    assert!(!no_write.status.success());
+    assert!(out_of(&no_write).contains("no folder may be written"), "{}", out_of(&no_write));
+
+    // A read outside every root is refused: `info` on the document with only `out` readable.
+    let read_refused = bin().args(["info", &p("in/doc.figcraft"), "--automation-read-root", &p("out")]).output().unwrap();
+    assert!(!read_refused.status.success());
+    assert!(out_of(&read_refused).contains("may be read"), "{}", out_of(&read_refused));
+
+    // `convert` and `run` take them as well, and a root that is not a folder is refused.
+    let missing = bin().args(["convert", &p("in/doc.figcraft"), &p("out/c.svg"), "--automation-read-root", &p("missing")]).output().unwrap();
+    assert!(!missing.status.success());
+    assert!(out_of(&missing).contains("automation-read-root"), "{}", out_of(&missing));
+
+    // Unconfined, the same render still writes wherever it is told.
+    let plain = bin().args(["render", &p("in/doc.figcraft"), "-o", &escaped.to_string_lossy()]).output().unwrap();
+    assert!(plain.status.success(), "{}", out_of(&plain));
+    assert!(escaped.is_file());
+    let _ = std::fs::remove_dir_all(&d);
+}
+
+/// An output path that is a symbolic link is written through, to its target, as `std::fs::write`
+/// always did. Routing the CLI's writes through `file_access` for #833 would otherwise have
+/// replaced the link with a regular file, because that write stages the bytes and renames them
+/// into place.
+#[cfg(unix)]
+#[test]
+fn an_unconfined_write_follows_a_symbolic_link() {
+    let d = tmp("symlink-out");
+    let _ = std::fs::remove_dir_all(&d);
+    std::fs::create_dir_all(d.join("real")).unwrap();
+    let p = |rel: &str| d.join(rel).to_string_lossy().into_owned();
+    std::fs::write(d.join("in.json"), br#"[{"command":"shape.rectangle","params":{"x":0,"y":0,"width":40,"height":20}}]"#).unwrap();
+    let made = bin().args(["run", &p("in.json"), "--out", &p("doc.figcraft")]).output().unwrap();
+    assert!(made.status.success(), "{}", String::from_utf8_lossy(&made.stderr));
+
+    let target = d.join("real/target.png");
+    std::fs::write(&target, b"placeholder").unwrap();
+    let link = d.join("link.png");
+    std::os::unix::fs::symlink(&target, &link).unwrap();
+
+    let out = bin().args(["render", &p("doc.figcraft"), "-o", &link.to_string_lossy()]).output().unwrap();
+    assert!(out.status.success(), "{}", String::from_utf8_lossy(&out.stderr));
+    assert!(std::fs::symlink_metadata(&link).unwrap().file_type().is_symlink(), "the link is still a link");
+    let written = std::fs::read(&target).unwrap();
+    assert!(written.starts_with(b"\x89PNG"), "the target holds the render, not the placeholder");
+    let _ = std::fs::remove_dir_all(&d);
+}

apps/figcraft-cli/tests/fonts.rs

@@ -45,3 +45,25 @@ fn headless_runs_resolve_installed_families_unless_opted_out() {
     assert_eq!(run_one("face", face.clone(), &[], false)["family"], json!(installed), "text uses the installed family");
     assert_ne!(run_one("face", face, &["--no-system-fonts"], false)["family"], json!(installed), "opted out, it falls back");
 }
+
+#[test]
+fn info_lists_the_fonts_a_file_uses_that_are_missing() {
+    let d = std::env::temp_dir().join(format!("figcraft-cli-missing-{}", std::process::id()));
+    std::fs::create_dir_all(&d).unwrap();
+    let (script, file) = (d.join("make.json"), d.join("doc.figcraft"));
+    let text =
+        |family: &str| json!({"command": "text.create", "params": {"text": "Hamburgefonstiv", "x": 0, "y": 0, "props": {"fontFamily": family}}});
+    std::fs::write(&script, json!([text("FigCraft Missing CLI"), text("FigCraft Missing CLI")]).to_string()).unwrap();
+    let cli = || Command::new(env!("CARGO_BIN_EXE_figcraft-cli"));
+    let made = cli().arg("run").arg(&script).arg("--out").arg(&file).output().unwrap();
+    assert!(made.status.success(), "{}", String::from_utf8_lossy(&made.stderr));
+
+    let out = cli().arg("info").arg(&file).arg("--json").output().unwrap();
+    assert!(out.status.success(), "{}", String::from_utf8_lossy(&out.stderr));
+    let v: Value = serde_json::from_slice(&out.stdout).unwrap();
+    assert_eq!(v["missingFonts"], json!([{"family": "FigCraft Missing CLI", "layers": 2}]));
+
+    let out = cli().arg("info").arg(&file).output().unwrap();
+    let shown = String::from_utf8_lossy(&out.stdout);
+    assert!(shown.contains("missing font \"FigCraft Missing CLI\": 2 text layers"), "{shown}");
+}

apps/figcraft-server/src/config.rs

@@ -135,9 +135,23 @@ impl Config {
     /// abuse contact, or one whose clients would all count as its proxy).
     pub fn warnings(&self) -> Vec<String> {
         let mut out = Vec::new();
+        let client_max = NetLimits::default().max_server_message >> 20;
+        if usize::try_from(self.file_mb()).is_ok_and(|mb| mb >= client_max) {
+            out.push(format!(
+                "max_file_mb is {}: the app opens files of up to {} MiB, so a file that large can't be opened",
+                self.file_mb(),
+                client_max - 1
+            ));
+        }
         if !self.open_publish {
             return out;
         }
+        if self.file_mb() > 64 {
+            out.push(format!(
+                "open_publish is on with max_file_mb = {}: anyone may send messages that large, and the memory set aside for reading and queueing them grows to eight times it; keep it at 64 or less on a public server",
+                self.file_mb()
+            ));
+        }
         if self.operator_contact.trim().is_empty() {
             out.push("open_publish is on but operator_contact is empty: people can't reach you about abuse; set it (and terms_url)".into());
         }
@@ -168,7 +182,7 @@ impl Config {
             return Err("`idle_days` must be from 0 to 3650".into());
         }
         let terms = self.terms_url.trim();
-        if !terms.is_empty() && !(terms.starts_with("https://") || terms.starts_with("http://")) || terms.contains(char::is_whitespace) {
+        if !(terms.is_empty() || terms.starts_with("https://") || terms.starts_with("http://")) || terms.contains(char::is_whitespace) {
             return Err("`terms_url` must be a web address (https://…)".into());
         }
         if self.operator_contact.chars().count() > 120 || self.operator_contact.chars().any(char::is_control) || terms.len() > 500 {
@@ -253,8 +267,9 @@ impl Config {
         }
     }
 
-    /// Largest message a client may send when open to the public: a whole file (or plugin bundle)
-    /// and a margin, not the core's 64 MiB.
+    /// Largest message a client may send: a whole file (or plugin bundle) and a margin. Open to the
+    /// public this is also the cap (strangers' files stay small); a private server never goes below
+    /// the core's 64 MiB, and a `max_file_mb` above it raises the cap with it.
     fn open_message(&self) -> usize {
         usize::try_from(self.file_mb().max(self.max_plugin_mb).saturating_add(1).saturating_mul(1 << 20)).unwrap_or(usize::MAX)
     }
@@ -265,9 +280,9 @@ impl Config {
     fn core(&self) -> figcraft_collab::Limits {
         let base = figcraft_collab::Limits { max_peers: self.max_people, ..figcraft_collab::Limits::default() };
         if !self.open_publish {
-            return base;
+            return figcraft_collab::Limits { max_message_bytes: base.max_message_bytes.max(self.open_message()), ..base };
         }
-        let max = self.open_message().min(base.max_message_bytes);
+        let max = self.open_message();
         let file = usize::try_from(self.file_mb().saturating_mul(1 << 20)).unwrap_or(usize::MAX);
         figcraft_collab::Limits { max_message_bytes: max, max_log_bytes: (file / 4).max(256 << 10), ..base }
     }
@@ -279,21 +294,24 @@ impl Config {
     pub fn net(&self) -> NetLimits {
         let base = NetLimits { max_connections: self.max_connections, trusted_proxy: self.proxy().ok().flatten(), ..NetLimits::default() };
         if !self.open_publish {
-            return base;
+            let max = base.max_client_message.max(self.open_message());
+            return NetLimits { max_client_message: max, max_queued_bytes: base.max_queued_bytes.max(max.saturating_add(1 << 20)), ..base };
         }
-        let max = self.open_message().min(base.max_client_message);
+        let max = self.open_message();
         // Shared budgets: one block of addresses (an IPv4 address, an IPv6 /48) gets at most an
-        // eighth of each, and its biggest consumers are dropped first.
-        let (queued, reading) = (256usize << 20, 192usize << 20);
+        // eighth of each, and its biggest consumers are dropped first. Each still fits one whole
+        // message, or a file as large as `max_file_mb` could never arrive.
+        let one = max.saturating_add(1 << 20);
+        let (queued, reading) = ((256usize << 20).max(one.saturating_mul(8)), (192usize << 20).max(one.saturating_mul(8)));
         NetLimits {
             max_per_address: self.max_connections_per_ip,
             max_client_message: max,
-            max_queued_bytes: max.saturating_add(1 << 20),
+            max_queued_bytes: one,
             max_queued_block: queued / 8,
             max_queued_total: queued,
-            max_reading_block: max.saturating_add(1 << 20).min(reading / 8),
+            max_reading_block: one.min(reading / 8),
             max_reading_total: reading,
-            max_in_flight: 128 << 20,
+            max_in_flight: (128usize << 20).max(one),
             reserve_for_sessions: self.max_connections / 8,
             request_idle: std::time::Duration::from_secs(20),
             ..base

apps/figcraft-server/src/disk.rs

@@ -8,8 +8,10 @@
 //!   length (u32 LE), CRC-32 (u32 LE), one [`Journal`] entry in the wire encoding.
 //!
 //! Compaction writes the next generation's snapshot, then an empty log of that generation. A log
-//! whose generation isn't the snapshot's is from before a compaction that was cut short: what it
-//! holds is in the snapshot already. A log ends at its first damaged record (a write cut short).
+//! whose generation isn't the snapshot's is usually from before a compaction that was cut short
+//! (what it holds is in the snapshot already), but no checksum covers either generation, so the
+//! store replays such a log anyway and reports any change the snapshot lacked. A log ends at its
+//! first damaged record (a write cut short).
 
 use std::fs::{self, File};
 use std::io::{self, Read, Write};

apps/figcraft-server/src/public_tests.rs

@@ -413,7 +413,7 @@ fn open_mode_has_safe_defaults_and_warns_the_operator() {
     assert_eq!(open.net().request_idle, Duration::from_secs(20), "idle one-shot requests go quickly");
     assert_eq!(open.net().reserve_for_sessions, 512 / 8);
     assert_eq!(open.net().max_client_message, 17 << 20);
-    assert_eq!(private.net().max_client_message, NetLimits::default().max_client_message, "unchanged when private");
+    assert_eq!(private.net().max_client_message, 65 << 20, "private: a 64 MiB file and a margin");
     let w = open.warnings().join("\n");
     assert!(w.contains("operator_contact is empty") && w.contains("trusted_proxy"), "{w}");
     let set = Config { operator_contact: "[email protected]".into(), trusted_proxy: Some("127.0.0.1".into()), max_file_mb: Some(8), ..open };
@@ -493,3 +493,34 @@ fn open_connections_never_reach_what_needs_the_key() {
     assert!(!format!("{info:?}").contains(&k));
     server.stop();
 }
+
+#[test]
+fn files_above_64_mib_fit_every_limit() {
+    // `max_file_mb` may go up to 4096: every cap a whole file's message meets on its way in must
+    // follow it, or the upload is dropped by the transport before the server can say why.
+    for open_publish in [false, true] {
+        let cfg = Config { open_publish, max_file_mb: Some(256), public_url: Some("wss://figcraft.example.com/".into()), ..Config::default() };
+        let (net, core, file) = (cfg.net(), cfg.store().core, 256usize << 20);
+        assert!(net.max_client_message > file, "open={open_publish}: {}", net.max_client_message);
+        assert!(net.max_queued_bytes > file && net.max_reading_block > file && net.max_in_flight > file, "open={open_publish}: {net:?}");
+        assert!(net.max_reading_total >= net.max_reading_block && net.max_queued_total >= net.max_queued_block);
+        assert!(core.max_message_bytes > file, "open={open_publish}: {}", core.max_message_bytes);
+    }
+    // A client takes such a file too, but caps what any server may make it buffer at 1 GiB.
+    assert_eq!(NetLimits::default().max_server_message, 1 << 30);
+}
+
+#[test]
+fn large_files_warn_the_operator() {
+    let public_url = Some("wss://figcraft.example.com/".into());
+    let warns = |open_publish, mb| {
+        Config { open_publish, max_file_mb: Some(mb), public_url: public_url.clone(), ..Config::default() }.warnings().join(
+            "
+",
+        )
+    };
+    assert!(!warns(true, 64).contains("max_file_mb"), "{}", warns(true, 64));
+    assert!(warns(true, 65).contains("open_publish is on with max_file_mb = 65"), "{}", warns(true, 65));
+    assert!(!warns(false, 1023).contains("max_file_mb"), "{}", warns(false, 1023));
+    assert!(warns(false, 1024).contains("can't be opened"), "{}", warns(false, 1024));
+}

apps/figcraft-server/src/store.rs

@@ -440,7 +440,7 @@ impl Store {
             && let Ok(log) = disk::read_log(&bytes)
             && log.generation != generation
         {
-            log::info!("file at {}: its log predates the last compaction; it is ignored", path.display());
+            log::info!("file at {}: its log isn't of its snapshot's generation; it is replayed over it when the file opens", path.display());
         }
         let bytes = [SNAPSHOT, LOG].iter().filter_map(|n| fs::metadata(path.join(n)).ok()).map(|m| m.len()).sum();
         Ok(Entry { meta, links, log: None, bytes, forced: 0 })
@@ -1126,8 +1126,32 @@ impl Store {
                     fresh_log = true;
                 }
             }
-            // From before a compaction that was cut short: the snapshot has it all.
-            Ok(_) => {}
+            // From before a compaction that was cut short, the snapshot has it all; or a generation
+            // field damaged, which no checksum covers. Replaying tells them apart without trusting
+            // it: entries the snapshot holds are skipped, so only edits it lacks change anything.
+            Ok(log) => {
+                let before = server.seq();
+                let mut stopped = None;
+                for entry in log.entries {
+                    if let Err(e) = server.replay(entry) {
+                        stopped = Some(e);
+                        break;
+                    }
+                }
+                let (snap, found, recovered) = (generation, log.generation, server.seq().saturating_sub(before));
+                if recovered > 0 {
+                    issues.push(format!(
+                        "file {file}: its log's generation ({found}) doesn't match its snapshot's ({snap}), but it held \
+                         {recovered} changes the snapshot didn't; they were recovered"
+                    ));
+                }
+                if let Some(e) = stopped {
+                    issues.push(format!(
+                        "file {file}: its log's generation ({found}) doesn't match its snapshot's ({snap}) and it stops \
+                         making sense after {recovered} newer changes ({e}); the rest was dropped"
+                    ));
+                }
+            }
             Err(why) => issues.push(format!("file {file}: {why}; starting a new log")),
         }
         for i in issues {

apps/figcraft-server/tests/header_recovery.rs

@@ -0,0 +1,139 @@
+//! A generation field damaged after an abrupt stop must not make the server drop a log that still
+//! holds confirmed edits (#408): the log is replayed over the snapshot, which only the changes the
+//! snapshot lacks survive, and the damage is reported. A genuine leftover of a compaction cut short
+//! still restores silently.
+#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+
+use figcraft_collab::message::{Access, ClientMsg};
+use figcraft_collab::{Client, Outgoing, Replica, Server};
+use figcraft_collab_net::hub::Backend;
+use figcraft_doc::Document;
+use figcraft_server::config::Config;
+use figcraft_server::disk::{self, LOG, SNAPSHOT};
+use figcraft_server::store::{FILES, Store};
+use std::fs;
+use std::path::{Path, PathBuf};
+
+struct Fixture(PathBuf);
+
+impl Fixture {
+    fn new() -> Self {
+        let path = std::env::temp_dir().join(format!("figcraft-header-recovery-{}", figcraft_collab_net::token::file_id().unwrap()));
+        fs::create_dir(&path).unwrap();
+        Self(path)
+    }
+}
+
+impl Drop for Fixture {
+    fn drop(&mut self) {
+        let _ = fs::remove_dir_all(&self.0);
+    }
+}
+
+fn page_name(server: &Server) -> String {
+    let doc = server.document();
+    doc.node(doc.first_page().unwrap()).unwrap().name.clone()
+}
+
+/// A published file whose first page was renamed "Kept", flushed to its log (not compacted), then
+/// the store dropped without stopping (an abrupt stop). Returns the file id and the final state.
+fn renamed_and_stopped(data: &Path) -> (String, Server) {
+    let mut store = Store::open(data, Config::default().store()).unwrap();
+    let snapshot = Replica::new(Document::new("Fixture")).snapshot().unwrap();
+    let (info, _, _) = store.publish("Fixture", &snapshot).unwrap();
+    let id = info.id;
+    let mut server = store.open(&id).unwrap();
+    let ClientMsg::Hello(hello) = Client::hello("f", "", "Editor", "#FF8800") else { panic!("not a hello") };
+    let (_, messages) = server.join_as(hello, Access::Edit).unwrap();
+    let Some(Outgoing::To(_, welcome)) = messages.into_iter().next() else { panic!("no welcome") };
+    let mut client = Client::join(welcome).unwrap();
+    store.changed(&id, &mut server);
+    let mut edited = client.document().clone();
+    let page = edited.first_page().unwrap();
+    edited.node_mut(page).unwrap().name = "Kept".into();
+    let change = client.edit(&edited).unwrap().unwrap();
+    assert!(!server.receive(client.id(), change).is_empty());
+    store.changed(&id, &mut server);
+    assert!(store.flush().is_empty(), "the edit must reach disk");
+    assert_eq!(page_name(&server), "Kept");
+    let dir = data.join(FILES).join(&id);
+    assert!(!disk::read_log(&fs::read(dir.join(LOG)).unwrap()).unwrap().entries.is_empty());
+    assert_eq!(disk::decode_snapshot(&fs::read(dir.join(SNAPSHOT)).unwrap()).unwrap().1.seq, 0, "the rename is only in the log");
+    drop(store);
+    (id, server)
+}
+
+/// Reopen the data directory: the file's first page name and the problems reported.
+fn reopen(data: &Path, id: &str) -> (String, Vec<String>) {
+    let mut store = Store::open(data, Config::default().store()).unwrap();
+    let server = store.open(id).unwrap();
+    (page_name(&server), store.problems().to_vec())
+}
+
+fn flip(path: &Path, at: usize) {
+    let mut bytes = fs::read(path).unwrap();
+    bytes[at] ^= 1;
+    fs::write(path, bytes).unwrap();
+}
+
+/// The generation field's first byte in both headers (after the magic and the format byte).
+const GENERATION_AT: usize = 5;
+
+#[test]
+fn an_intact_log_restores_its_edits_without_a_report() {
+    let fixture = Fixture::new();
+    let (id, _) = renamed_and_stopped(&fixture.0);
+    let (name, problems) = reopen(&fixture.0, &id);
+    assert_eq!(name, "Kept");
+    assert!(problems.is_empty(), "{problems:?}");
+}
+
+#[test]
+fn a_damaged_log_generation_keeps_the_edits_and_is_reported() {
+    let fixture = Fixture::new();
+    let (id, _) = renamed_and_stopped(&fixture.0);
+    let log = fixture.0.join(FILES).join(&id).join(LOG);
+    flip(&log, GENERATION_AT);
+    // The records themselves still read: only the header's generation changed.
+    let read = disk::read_log(&fs::read(&log).unwrap()).unwrap();
+    assert!(read.damaged.is_none() && !read.entries.is_empty());
+    let (name, problems) = reopen(&fixture.0, &id);
+    assert_eq!(name, "Kept", "the flushed rename must survive");
+    assert!(problems.iter().any(|p| p.contains(&id) && p.contains("generation")), "{problems:?}");
+    // And it stays: the recovered edit is now in the file's snapshot.
+    assert_eq!(reopen(&fixture.0, &id).0, "Kept");
+}
+
+#[test]
+fn a_damaged_snapshot_generation_keeps_the_edits_and_is_reported() {
+    let fixture = Fixture::new();
+    let (id, _) = renamed_and_stopped(&fixture.0);
+    let snapshot = fixture.0.join(FILES).join(&id).join(SNAPSHOT);
+    flip(&snapshot, GENERATION_AT);
+    assert!(disk::check_snapshot(&fs::read(&snapshot).unwrap()).is_ok(), "the generation is outside the checksum");
+    let (name, problems) = reopen(&fixture.0, &id);
+    assert_eq!(name, "Kept", "the flushed rename must survive");
+    assert!(problems.iter().any(|p| p.contains(&id) && p.contains("generation")), "{problems:?}");
+    assert_eq!(reopen(&fixture.0, &id).0, "Kept");
+}
+
+#[test]
+fn a_damaged_log_format_is_still_reported() {
+    let fixture = Fixture::new();
+    let (id, _) = renamed_and_stopped(&fixture.0);
+    flip(&fixture.0.join(FILES).join(&id).join(LOG), 4);
+    let (_, problems) = reopen(&fixture.0, &id);
+    assert!(problems.iter().any(|p| p.contains(&id) && p.contains("format")), "{problems:?}");
+}
+
+#[test]
+fn a_log_left_by_a_compaction_cut_short_restores_without_a_report() {
+    let fixture = Fixture::new();
+    let (id, server) = renamed_and_stopped(&fixture.0);
+    // The next snapshot was written (it holds the rename); the old log wasn't replaced yet.
+    let bytes = disk::encode_snapshot(2, &server.state().unwrap()).unwrap();
+    fs::write(fixture.0.join(FILES).join(&id).join(SNAPSHOT), bytes).unwrap();
+    let (name, problems) = reopen(&fixture.0, &id);
+    assert_eq!(name, "Kept");
+    assert!(problems.is_empty(), "a leftover log is expected, not damage: {problems:?}");
+}

apps/figcraft-web/Cargo.toml

@@ -26,4 +26,4 @@ eframe = { workspace = true, features = ["default_fonts", "wgpu", "accesskit"] }
 wasm-bindgen = "0.2"
 js-sys = "0.3"
 wasm-bindgen-futures = "0.4"
-web-sys = { version = "0.3", features = ["Window", "Document", "Element", "HtmlCanvasElement", "HtmlElement", "HtmlAnchorElement", "Node", "Blob", "BlobPropertyBag", "Url", "Location", "MediaQueryList", "Navigator", "Gamepad", "GamepadButton", "GamepadMappingType"] }
+web-sys = { version = "0.3", features = ["Window", "Document", "Element", "HtmlCanvasElement", "HtmlElement", "HtmlAnchorElement", "Node", "Blob", "BlobPropertyBag", "File", "FileList", "HtmlInputElement", "EventTarget", "Url", "Location", "MediaQueryList", "Navigator", "Gamepad", "GamepadButton", "GamepadMappingType"] }

apps/figcraft-web/src/main.rs

@@ -14,7 +14,16 @@
 //!   join from other machines.
 //!
 //! URL query flag: `?webgl` forces the WebGL2 backend instead of WebGPU.
+//!
+//! URL fragment: `#join=<invite link or join code>` joins that live session once the page has
+//! loaded, so a bookmark opens a shared file. `join` takes the rest of the fragment: put it last.
+//! The link carries the session's secret; a fragment is never sent to the web host, but the address
+//! bar and the browser history keep it, so the URL is as private as the link itself.
 
+#[cfg(any(target_arch = "wasm32", test))]
+mod query;
+#[cfg(test)]
+mod query_tests;
 #[cfg(target_arch = "wasm32")]
 mod web;
 

apps/figcraft-web/src/query.rs

@@ -0,0 +1,15 @@
+//! The page's URL: the invite link its fragment names.
+
+/// The invite link in `#join=<link>` (`fragment` is `location.hash`, with or without its `#`), still
+/// escaped. The fragment, unlike the query, never leaves the browser, so the link's secret stays out
+/// of the web host's logs and `Referer` headers. `join` takes the rest of the fragment, so a pasted
+/// `figcraft://join?host=…&file=…&token=…` keeps its own `&`s. Anything longer than an escaped invite
+/// link can be is ignored; what is left is checked by `collab.join` like a link the desktop app is
+/// opened with.
+pub fn join_link(fragment: &str) -> Option<&str> {
+    // An invite link is at most 2 KiB; every byte of it escaped is three.
+    const MAX: usize = 3 * 2048;
+    let fragment = fragment.strip_prefix('#').unwrap_or(fragment);
+    let start = if fragment.starts_with("join=") { 0 } else { fragment.find("&join=")? + 1 };
+    fragment.get(start + "join=".len()..).filter(|link| !link.is_empty() && link.len() <= MAX)
+}

apps/figcraft-web/src/query_tests.rs

@@ -0,0 +1,29 @@
+//! `#join=` in the page's URL.
+
+use crate::query::join_link;
+
+#[test]
+fn join_takes_the_rest_of_the_fragment() {
+    let link = "figcraft://join?host=192.168.1.20:47900&file=abc&token=AbCdEfGhIjKlMnOpQrStUv";
+    assert_eq!(join_link(&format!("#join={link}")), Some(link), "a pasted link keeps its own &s");
+    assert_eq!(join_link(&format!("#x=1&join={link}")), Some(link), "after other entries");
+    assert_eq!(join_link("#join=figcraft%3A%2F%2Fjoin%3Fhost%3Dh"), Some("figcraft%3A%2F%2Fjoin%3Fhost%3Dh"), "escaped, decoded later");
+    assert_eq!(join_link("join=K7M-2QX-9TD"), Some("K7M-2QX-9TD"), "a join code, no leading #");
+}
+
+#[test]
+fn no_join_without_the_entry() {
+    assert_eq!(join_link(""), None);
+    assert_eq!(join_link("#"), None);
+    assert_eq!(join_link("#join="), None);
+    assert_eq!(join_link("#rejoin=x"), None, "only the whole entry name");
+    assert_eq!(join_link("#xjoin=x&a=1"), None);
+    assert_eq!(join_link("?join=x"), None, "the query isn't read: it goes to the web host");
+}
+
+#[test]
+fn an_overlong_link_is_ignored() {
+    let long = format!("#join=figcraft://join?host=h&file=f&token={}", "a".repeat(7000));
+    assert_eq!(join_link(&long), None);
+    assert_eq!(join_link(&format!("#join={}", "é".repeat(4000))), None, "length counts bytes");
+}

apps/figcraft-web/src/web.rs

@@ -1,7 +1,7 @@
 //! The browser shell: web `Services` and the eframe web runner.
 
 use figcraft_engine::Session;
-use figcraft_ui_egui::{FigApp, Services};
+use figcraft_ui_egui::{ContentsFuture, FigApp, Services};
 use wasm_bindgen::JsCast as _;
 
 const CANVAS_ID: &str = "figcraft_canvas";
@@ -40,7 +40,13 @@ pub fn start() {
                     // on the socket wakes the page for a frame.
                     let ctx = cc.egui_ctx.clone();
                     session.live.install(Box::new(figcraft_collab_net::NetLink::new(std::sync::Arc::new(move || ctx.request_repaint()))));
-                    let fig = FigApp::new(session, Box::new(WebServices { reduce_motion, ctx: cc.egui_ctx.clone() }));
+                    let mut fig = FigApp::new(session, Box::new(WebServices { reduce_motion, ctx: cc.egui_ctx.clone() }));
+                    // `#join=<link>`: join that session, as opening an invite link does on the desktop.
+                    let hash = web_sys::window().and_then(|w| w.location().hash().ok()).unwrap_or_default();
+                    if let Some(link) = crate::query::join_link(&hash) {
+                        let link = js_sys::decode_uri_component(link).ok().and_then(|s| s.as_string()).unwrap_or_else(|| link.to_string());
+                        figcraft_ui_egui::live::open_invite(&mut fig, &link);
+                    }
                     Ok(Box::new(WebShell { fig }))
                 }),
             )
@@ -69,9 +75,10 @@ impl eframe::App for WebShell {
     }
 }
 
-/// Browser services. Open dialogs return nothing for now (the trait's defaults); files are saved
-/// as downloads. Copies go to the system clipboard through egui's output; pastes arrive as paste
-/// events with their text (a page can't read the clipboard when it likes).
+/// Browser services. Files are opened and imported through the browser's file picker, which hands
+/// over their contents (pickers that need a path return nothing, the trait's defaults); files are
+/// saved as downloads. Copies go to the system clipboard through egui's output; pastes arrive as
+/// paste events with their text (a page can't read the clipboard when it likes).
 struct WebServices {
     /// `prefers-reduced-motion: reduce` (it follows the setting while the page is open).
     reduce_motion: Option<web_sys::MediaQueryList>,
@@ -79,6 +86,16 @@ struct WebServices {
 }
 
 impl Services for WebServices {
+    /// An `<input type="file">` taking `exts`, clicked; its file is read once picked.
+    fn pick_open_contents(&mut self, _title: &str, exts: &[&str]) -> Option<ContentsFuture> {
+        let accept = exts.iter().map(|e| format!(".{e}")).collect::<Vec<_>>().join(",");
+        Some(Box::pin(async move {
+            pick_file(&accept).await.unwrap_or_else(|e| {
+                log::error!("couldn't open a file: {e:?}");
+                None
+            })
+        }))
+    }
     fn downloads(&self) -> bool {
         true
     }
@@ -130,6 +147,90 @@ impl Services for WebServices {
     }
 }
 
+/// The file picked in the browser's file picker (`accept`: the extensions it offers), with its
+/// name; `None` when the picker is cancelled, `Some(Err)` with what to tell the user when the file
+/// can't be read.
+async fn pick_file(accept: &str) -> Result<Option<Result<(String, Vec<u8>), String>>, wasm_bindgen::JsValue> {
+    let window = web_sys::window().ok_or("no window")?;
+    let document = window.document().ok_or("no document")?;
+    let body = document.body().ok_or("no body")?;
+    let input: web_sys::HtmlInputElement = document.create_element("input")?.dyn_into()?;
+    input.set_type("file");
+    input.set_accept(accept);
+    input.set_hidden(true);
+    // Some browsers (older Safari) open the picker only for an input in the page.
+    body.append_child(&input)?;
+    let (closed, picker) = PickerClosed::new(&window, input.clone());
+    input.click();
+    let result = wasm_bindgen_futures::JsFuture::from(closed).await;
+    let file = input.files().and_then(|files| files.get(0));
+    drop(picker);
+    result?;
+    let Some(file) = file else { return Ok(None) };
+    let name = file.name();
+    if let Err(why) = figcraft_ui_egui::browser_can_read(&name, file.size()) {
+        return Ok(Some(Err(why)));
+    }
+    Ok(Some(match wasm_bindgen_futures::JsFuture::from(file.array_buffer()).await {
+        Ok(buffer) => Ok((name, js_sys::Uint8Array::new(&buffer).to_vec())),
+        Err(e) => {
+            log::error!("couldn't read {name}: {e:?}");
+            Err(figcraft_ui_egui::unreadable(&name))
+        }
+    }))
+}
+
+/// How long after the page gets focus back the file picker counts as closed (milliseconds): a
+/// picked file's `change` can come just after the focus, and must win. A `change` later than this
+/// (a slow cloud-backed file in a browser that never sends `cancel`) counts as a cancel.
+const PICKER_FOCUS_SETTLE_MS: i32 = 1_000;
+
+/// Settles a file picker's promise once: on `change` (a file was picked), on `cancel` (closed
+/// without one) or shortly after the page gets focus back, for browsers that never send `cancel`
+/// (Safari before 16.4), where the pick would otherwise stay pending and block every later one.
+/// Dropping it (also when the pick is abandoned) removes the input, the focus listener and its timer.
+struct PickerClosed {
+    window: web_sys::Window,
+    input: web_sys::HtmlInputElement,
+    _settle: wasm_bindgen::closure::Closure<dyn FnMut()>,
+    on_focus: wasm_bindgen::closure::Closure<dyn FnMut()>,
+    timer: std::rc::Rc<std::cell::Cell<Option<i32>>>,
+}
+
+impl PickerClosed {
+    fn new(window: &web_sys::Window, input: web_sys::HtmlInputElement) -> (js_sys::Promise, Self) {
+        let resolve = std::rc::Rc::new(std::cell::RefCell::new(None::<js_sys::Function>));
+        let slot = resolve.clone();
+        let closed = js_sys::Promise::new(&mut |res, _rej| *slot.borrow_mut() = Some(res));
+        let settle = wasm_bindgen::closure::Closure::<dyn FnMut()>::new(move || {
+            if let Some(res) = resolve.borrow_mut().take() {
+                let _ = res.call0(&wasm_bindgen::JsValue::NULL);
+            }
+        });
+        let _ = input.add_event_listener_with_callback("change", settle.as_ref().unchecked_ref());
+        let _ = input.add_event_listener_with_callback("cancel", settle.as_ref().unchecked_ref());
+        let timer = std::rc::Rc::new(std::cell::Cell::new(None));
+        let (w, t, f) = (window.clone(), timer.clone(), settle.as_ref().unchecked_ref::<js_sys::Function>().clone());
+        let on_focus = wasm_bindgen::closure::Closure::<dyn FnMut()>::new(move || {
+            if t.get().is_none() {
+                t.set(w.set_timeout_with_callback_and_timeout_and_arguments_0(&f, PICKER_FOCUS_SETTLE_MS).ok());
+            }
+        });
+        let _ = window.add_event_listener_with_callback("focus", on_focus.as_ref().unchecked_ref());
+        (closed, Self { window: window.clone(), input, _settle: settle, on_focus, timer })
+    }
+}
+
+impl Drop for PickerClosed {
+    fn drop(&mut self) {
+        if let Some(t) = self.timer.take() {
+            self.window.clear_timeout_with_handle(t);
+        }
+        let _ = self.window.remove_event_listener_with_callback("focus", self.on_focus.as_ref().unchecked_ref());
+        self.input.remove();
+    }
+}
+
 fn download(name: &str, bytes: &[u8]) -> Result<(), wasm_bindgen::JsValue> {
     let window = web_sys::window().ok_or("no window")?;
     let document = window.document().ok_or("no document")?;

apps/figcraft/Cargo.toml

@@ -16,12 +16,16 @@ figcraft-ui-egui = { workspace = true }
 figcraft-collab-net = { workspace = true }
 figcraft-format = { workspace = true }
 figcraft-text = { workspace = true }
+# Shared decision of who draws the window frame on Linux (compositor vs. app), replacing the
+# bespoke Wayland xdg-decoration probe. See `[workspace.dependencies]`: pinned to the unmerged
+# craft-libs#217 branch and must be repointed to a merged `rev` before this PR is mergeable.
+craft-window = { workspace = true }
 egui = { workspace = true }
 eframe = { workspace = true, features = ["default_fonts", "wgpu", "accesskit", "wayland", "x11"] }
 serde_json = { workspace = true }
 log = { workspace = true }
 rfd = { workspace = true }
-arboard = { workspace = true, features = ["image-data"] }
+arboard = { workspace = true, features = ["image-data", "wayland-data-control"] }
 webbrowser = { workspace = true }
 image = { workspace = true }
 env_logger = { version = "0.11", default-features = false, features = ["auto-color", "humantime"] }
@@ -43,3 +47,8 @@ wat = { workspace = true }
 
 [build-dependencies]
 winresource = "0.1"
+
+[target.'cfg(target_os = "linux")'.dependencies]
+# Use vector window controls without a title-font renderer or embedded Cantarell. The compositor
+# probe that used to need raw-window-handle and wayland-client here now lives in craft-window.
+winit = { version = "0.30", default-features = false, features = ["wayland-csd-adwaita-notitle"] }

apps/figcraft/src/apple_events.rs

@@ -50,7 +50,7 @@ pub fn poll(inbox: &Inbox, fig: &mut FigApp, ctx: &egui::Context) {
 /// Open `paths` as File › Open does; a file that fails shows its error and the others still open.
 pub fn open_documents(fig: &mut FigApp, paths: Vec<PathBuf>) {
     for p in paths {
-        if fig.run("file.open", json!({"path": p.to_string_lossy()})).is_some() {
+        if fig.run_user("file.open", json!({"path": p.to_string_lossy()})).is_some() {
             fig.ui.home = false;
         }
     }

apps/figcraft/src/args.rs

@@ -1,16 +1,26 @@
-//! The command line: `figcraft [--control <port>] [files…] [figcraft://join?…]`. An invite link
+//! The command line: `figcraft [--control <port>] [--automation-read-root <dir>]…
+//! [--automation-write-root <dir>]… [files…] [figcraft://join?…]`. An invite link
 //! (what the system passes when a `figcraft://` link is opened) joins that session once the window
 //! is up; everything else that isn't a flag is a file to open, as a path or a `file://` URL (the
-//! Linux desktop entry passes URLs, `%U`, so that it can also hand over invite links).
+//! Linux desktop entry passes URLs, `%U`, so that it can also hand over invite links). Any other
+//! `--flag` is unknown and stops the app at startup (#836): a mistyped root flag must never leave
+//! the app running unconfined. After a bare `--`, every argument is a file.
 
 /// What the app was started with.
 #[derive(Debug, Default, PartialEq, Eq)]
 pub struct Args {
-    /// `--control <port>`: the JSON-lines control server.
+    /// `--control <port>` (or `--control=<port>`): the JSON-lines control server.
     pub control: Option<u16>,
     pub files: Vec<String>,
     /// The last invite link given.
     pub join: Option<String>,
+    /// `--automation-read-root <dir>` / `--automation-write-root <dir>` (each repeatable; `=` works
+    /// too): the folders the app's file access is confined to. A flag without a value gives `""`,
+    /// which is refused at startup.
+    pub read_roots: Vec<String>,
+    pub write_roots: Vec<String>,
+    /// `--flags` the app doesn't know, as given.
+    pub unknown: Vec<String>,
 }
 
 /// An invite link rather than a file (`figcraft:` links, in any case).
@@ -49,13 +59,27 @@ pub fn parse(args: &[String]) -> Args {
     let mut out = Args::default();
     let mut it = args.iter();
     while let Some(a) = it.next() {
-        if a == "--control" {
-            out.control = it.next().and_then(|p| p.parse().ok());
+        if a == "--" {
+            out.files.extend(it.by_ref().cloned());
+            break;
+        }
+        let (flag, inline) = a.split_once('=').map_or((a.as_str(), None), |(f, v)| (f, Some(v.to_string())));
+        let roots = match flag {
+            "--automation-read-root" => Some(&mut out.read_roots),
+            "--automation-write-root" => Some(&mut out.write_roots),
+            _ => None,
+        };
+        if let Some(roots) = roots {
+            roots.push(inline.or_else(|| it.next().cloned()).unwrap_or_default());
+        } else if flag == "--control" {
+            out.control = inline.or_else(|| it.next().cloned()).and_then(|p| p.parse().ok());
         } else if is_invite(a) {
             out.join = Some(a.clone());
         } else if let Some(path) = file_url_path(a) {
             out.files.push(path);
-        } else if !a.starts_with("--") {
+        } else if a.starts_with("--") {
+            out.unknown.push(a.clone());
+        } else {
             out.files.push(a.clone());
         }
     }

apps/figcraft/src/args_tests.rs

@@ -9,13 +9,44 @@ fn args(a: &[&str]) -> Vec<String> {
 #[test]
 fn files_and_the_control_port() {
     assert_eq!(parse(&args(&[])), Args::default());
-    let a = parse(&args(&["--control", "4242", "a.figcraft", "--verbose", "b.svg"]));
-    assert_eq!(a, Args { control: Some(4242), files: args(&["a.figcraft", "b.svg"]), join: None });
+    let a = parse(&args(&["--control", "4242", "a.figcraft", "b.svg"]));
+    assert_eq!(a, Args { control: Some(4242), files: args(&["a.figcraft", "b.svg"]), ..Args::default() });
     // A missing or bad port is ignored, not taken as a file.
     assert_eq!(parse(&args(&["--control"])), Args::default());
     assert_eq!(parse(&args(&["--control", "nope"])).control, None);
 }
 
+#[test]
+fn the_control_port_accepts_the_equals_form() {
+    let a = parse(&args(&["--control=7980", "a.figcraft"]));
+    assert_eq!(a, Args { control: Some(7980), files: args(&["a.figcraft"]), ..Args::default() });
+    // A bad port is ignored, not taken as a file.
+    assert_eq!(parse(&args(&["--control=nope"])), Args::default());
+}
+
+#[test]
+fn automation_roots_repeat_and_are_never_files() {
+    let a = parse(&args(&["--automation-read-root", "in", "--automation-write-root=out", "--automation-read-root=more", "a.figcraft"]));
+    assert_eq!(a.read_roots, args(&["in", "more"]));
+    assert_eq!(a.write_roots, args(&["out"]));
+    assert_eq!(a.files, args(&["a.figcraft"]));
+    // A flag without its folder is kept as an empty one, which startup refuses.
+    assert_eq!(parse(&args(&["--automation-write-root"])).write_roots, args(&[""]));
+}
+
+#[test]
+fn unknown_flags_are_refused_never_ignored() {
+    // #836: a mistyped root flag (or one an older release lacks) must stop the app, not start it
+    // unconfined. Both forms, with and without `=`.
+    let a = parse(&args(&["--automation-write-roots", "out", "--automation-write-dir=out", "--verbose", "a.figcraft"]));
+    assert_eq!(a.unknown, args(&["--automation-write-roots", "--automation-write-dir=out", "--verbose"]));
+    assert!(a.write_roots.is_empty());
+    // Single-dash arguments are left as they were (files); after `--` everything is a file.
+    let a = parse(&args(&["--control", "1", "--", "--odd.figcraft", "--automation-write-root=x"]));
+    assert_eq!(a.files, args(&["--odd.figcraft", "--automation-write-root=x"]));
+    assert!(a.unknown.is_empty() && a.write_roots.is_empty());
+}
+
 #[test]
 fn invite_links_join_instead_of_opening() {
     let link = "figcraft://join?host=192.168.1.20:47900&file=abc&token=AbCdEfGhIjKlMnOpQrStUv";

apps/figcraft/src/control_server_tests.rs

@@ -160,7 +160,11 @@ fn connection_limit_rejects_excess_clients_and_reuses_finished_slots() {
     assert_eq!(workers.len(), 1);
     client.write_all(b"invalid\n").unwrap();
     assert_eq!(reply(&mut BufReader::new(client.try_clone().unwrap()))["ok"], false);
-    client.shutdown(Shutdown::Both).unwrap();
+    // The server closes this connection after answering an invalid request, and shutting down
+    // a socket whose peer has already closed is ENOTCONN on macOS and the BSDs where Linux
+    // returns Ok. Closing the client is what the worker is waiting for, so the result is moot:
+    // the other shutdowns in this file run while the peer is still open and stay checked.
+    let _ = client.shutdown(Shutdown::Both);
     workers.pop().unwrap().join().unwrap();
 }
 

apps/figcraft/src/main.rs

@@ -6,6 +6,12 @@
 //! `--control <port>` (or `FIGCRAFT_CONTROL_PORT`) starts a localhost JSON-lines control server:
 //! `{"id":1,"method":"engine.execute","params":{"command":"shape.rectangle","params":{"x":0,"y":0,"width":100,"height":100}}}`
 //! → `{"id":1,"ok":true,"result":{…}}`. Methods: `figcraft_ui_egui::control`.
+//!
+//! `--automation-read-root <dir>` / `--automation-write-root <dir>` (each repeatable) confine the
+//! files the window and the control channel read and write (`figcraft_engine::file_access`); the
+//! app's own folders (settings, recovery copies, installed plugins) and opening the files given on
+//! the command line are not. A root that isn't an existing folder stops the app at startup, and so
+//! does any flag the app doesn't know (a mistyped root flag must not start the app unconfined).
 #![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]
 #![cfg_attr(all(target_os = "windows", not(debug_assertions)), windows_subsystem = "windows")]
 
@@ -100,10 +106,13 @@ impl eframe::App for App {
     }
 
     fn on_exit(&mut self) {
-        with_app(|fig| services::save_state(fig));
-        if let Some(r) = recovery::lock(&self.recovery).take() {
-            r.finish();
-        }
+        // With the app out of reach (busy), its recovery copies stay for the next start.
+        let copies = recovery::lock(&self.recovery).take();
+        with_app(|fig| services::shutdown(fig, services::config_dir().as_deref(), copies));
+        // Everything is kept: end before the windows' teardown, where AppKit's Touch Bar support
+        // throws on the content view AccessKit restores (craft-libs#3, #781).
+        #[cfg(target_os = "macos")]
+        std::process::exit(0);
     }
 }
 
@@ -119,6 +128,23 @@ fn main() -> eframe::Result {
         return Ok(());
     }
     let args = args::parse(&args);
+    if let Some(flag) = args.unknown.first() {
+        eprintln!(
+            "FigCraft: unknown option {flag}\nUsage: figcraft [--control PORT] [--automation-read-root DIR]... [--automation-write-root DIR]... [FILE | figcraft://join?...]..."
+        );
+        std::process::exit(2);
+    }
+    let roots = match (
+        args.read_roots.is_empty() && args.write_roots.is_empty(),
+        figcraft_engine::file_access::Roots::new(&args.read_roots, &args.write_roots),
+    ) {
+        (true, _) => None,
+        (false, Ok(r)) => Some(Arc::new(r)),
+        (false, Err(e)) => {
+            eprintln!("FigCraft: {e}");
+            std::process::exit(2);
+        }
+    };
     let port = args.control.or_else(|| std::env::var("FIGCRAFT_CONTROL_PORT").ok().and_then(|p| p.parse().ok()));
     // System fonts: index them in the background, then wake the UI (an idle window draws no frames)
     // to lay text out again with them.
@@ -143,6 +169,7 @@ fn main() -> eframe::Result {
             log::error!("{f}: {e}");
         }
     }
+    let opened: Vec<u64> = session.docs.iter().map(|d| d.uid).collect();
     // Documents a crashed or killed run left unsaved come back; this run keeps its own copies.
     let recovery_root = services::config_dir().map(|d| d.join("Recovery"));
     // The preferences first: they hold the online files a recovered document may be one of.
@@ -164,17 +191,18 @@ fn main() -> eframe::Result {
     // default, never a build from source unless asked).
     session.live.links = figcraft_collab_net::links::system();
     session.invite_links_startup();
-    // A first run (no settings kept yet, nothing to open) starts on the home screen, with its
-    // tips and templates; later runs start in a new file.
     let first_run = svc.prefs.is_none() && args.join.is_none();
-    if session.docs.is_empty() && !first_run {
+    if session.docs.is_empty() && opens_new_file(first_run, session.prefs.start_on_home, port.is_some()) {
         let _ = session.execute("file.new", &json!({}));
     }
     // The interface language from the first frame on, and for the message when the window can't
     // open (no frame then).
     figcraft_ui_egui::i18n::set(&session.prefs.language, figcraft_ui_egui::Services::system_language(&svc).as_deref());
     let mut fig = FigApp::new(session, Box::new(svc));
+    fig.automation_roots = roots;
     fig.ui.home = false;
+    // Files named on the command line are the user's too: their missing fonts are listed.
+    fig.ui.font_checks = opened;
     fig.note_recovered(recovered.copies);
     if let Some(link) = &args.join {
         figcraft_ui_egui::live::open_invite(&mut fig, link);
@@ -192,15 +220,15 @@ fn main() -> eframe::Result {
         .with_inner_size([1440.0, 900.0])
         .with_min_inner_size([800.0, 500.0])
         .with_drag_and_drop(true);
-    // The tab strip is the title bar: macOS keeps its window buttons inset into it; elsewhere the
-    // window is frameless and FigCraft draws the buttons and resize edges.
-    if cfg!(target_os = "macos") {
-        viewport = viewport.with_fullsize_content_view(true).with_titlebar_shown(false).with_title_shown(false);
-        fig.ui.title_bar = figcraft_ui_egui::TitleBar::Inset;
-    } else {
-        viewport = viewport.with_decorations(false);
-        fig.ui.title_bar = figcraft_ui_egui::TitleBar::Custom;
-    }
+    // Who draws the window frame is decided once, before the viewport is built, by the shared
+    // craft-window crate (the rest of the Craft suite uses it too). On macOS the system frame is
+    // kept with FigCraft's inset traffic lights; on Windows it is the system frame; on Linux the
+    // decision follows the desktop: a Wayland compositor with server-side decorations (KDE, Sway,
+    // Hyprland, COSMIC) or an X11 window manager keeps the native frame, while GNOME's Mutter —
+    // which draws no server-side frame — leaves it to the app's own custom title bar. This replaces
+    // the old bespoke xdg-decoration probe that always drew FigCraft's custom title bar on KDE.
+    fig.ui.title_bar = desktop_title_bar();
+    viewport = window_chrome(viewport, fig.ui.title_bar);
     if let Some(icon) = icon {
         viewport = viewport.with_icon(icon);
     }
@@ -233,3 +261,115 @@ fn main() -> eframe::Result {
     }
     result
 }
+
+/// With nothing to open, whether the window starts in a new file rather than on the home screen.
+/// A first run (no settings kept yet) shows the home screen's tips and templates, and later runs
+/// start in a new file unless the preference asks for Home, which `--control` overrides: its
+/// callers expect a document to act on.
+fn opens_new_file(first_run: bool, start_on_home: bool, control: bool) -> bool {
+    !first_run && (!start_on_home || control)
+}
+
+/// The title bar FigCraft starts with, decided by the shared craft-window crate so every Craft app
+/// agrees on who draws the frame per desktop. The override variable is `FIGCRAFT_TITLEBAR`
+/// (`app` / `system`). macOS keeps its inset traffic lights unchanged (craft-window returns the
+/// desktop frame there); Windows keeps the system frame; on Linux the compositor/window manager
+/// decides (KDE/Sway/Hyprland/COSMIC and X11 keep the native frame, GNOME gets the custom one).
+fn desktop_title_bar() -> figcraft_ui_egui::TitleBar {
+    let choice = craft_window::Choice::probe(craft_window::Prefix::new("FIGCRAFT"));
+    title_bar_for(choice.into_frame())
+}
+
+/// Map craft-window's [`craft_window::Frame`] onto FigCraft's own [`figcraft_ui_egui::TitleBar`].
+///
+/// `Frame::App` means the app draws its own frame — FigCraft's custom title bar. `Frame::Desktop`
+/// means the desktop draws it, but FigCraft keeps each platform's existing look there:
+/// - macOS: the inset title bar with its traffic lights (`TitleBar::Inset`), unchanged.
+/// - Windows: FigCraft's own custom title bar (`TitleBar::Custom`), unchanged — Windows never used
+///   the plain native frame, and craft-window returning `Desktop` on Windows must not change that.
+/// - Linux and the BSDs: the compositor's native frame (`TitleBar::Native`). This is the only
+///   behaviour change: KDE and the other server-side-decoration compositors now keep their frame.
+fn title_bar_for(frame: craft_window::Frame) -> figcraft_ui_egui::TitleBar {
+    use figcraft_ui_egui::TitleBar;
+    match frame {
+        craft_window::Frame::Desktop if cfg!(target_os = "macos") => TitleBar::Inset,
+        // Windows kept FigCraft's own title bar before this change; keep it.
+        craft_window::Frame::Desktop if cfg!(target_os = "windows") => TitleBar::Custom,
+        craft_window::Frame::Desktop => TitleBar::Native,
+        // The app draws the frame (GNOME's Wayland session, or a `FIGCRAFT_TITLEBAR=app` override).
+        craft_window::Frame::App(_) => TitleBar::Custom,
+    }
+}
+
+fn window_chrome(viewport: egui::ViewportBuilder, title_bar: figcraft_ui_egui::TitleBar) -> egui::ViewportBuilder {
+    use figcraft_ui_egui::TitleBar;
+    match title_bar {
+        TitleBar::Inset => viewport.with_fullsize_content_view(true).with_titlebar_shown(false).with_title_shown(false),
+        TitleBar::Native => viewport.with_decorations(true),
+        TitleBar::Custom => viewport.with_decorations(false),
+    }
+}
+
+#[cfg(test)]
+mod title_bar_tests {
+    use figcraft_ui_egui::TitleBar;
+
+    /// craft-window's app frame (GNOME's Wayland session, or a `FIGCRAFT_TITLEBAR=app` override)
+    /// becomes FigCraft's custom title bar on every platform, and `window_chrome` then drops the
+    /// decorations so FigCraft draws its own.
+    #[test]
+    fn the_app_frame_maps_to_the_custom_title_bar() {
+        let layout = craft_window::Layout::default();
+        let bar = super::title_bar_for(craft_window::Frame::App(layout));
+        assert_eq!(bar, TitleBar::Custom);
+        let viewport = super::window_chrome(egui::ViewportBuilder::default(), bar);
+        assert_eq!(viewport.decorations, Some(false));
+    }
+
+    /// craft-window's desktop frame keeps each platform's existing look: macOS its inset traffic
+    /// lights, Windows FigCraft's own custom title bar (unchanged), and Linux/BSD the compositor's
+    /// native frame. The Linux case is the only behaviour change: KDE and the other
+    /// server-side-decoration compositors now keep their native frame.
+    #[test]
+    fn the_desktop_frame_is_mapped_per_platform() {
+        let bar = super::title_bar_for(craft_window::Frame::Desktop);
+        if cfg!(target_os = "macos") {
+            assert_eq!(bar, TitleBar::Inset);
+        } else if cfg!(target_os = "windows") {
+            // Windows kept its own title bar before and must keep it now.
+            assert_eq!(bar, TitleBar::Custom);
+            let viewport = super::window_chrome(egui::ViewportBuilder::default(), bar);
+            assert_eq!(viewport.decorations, Some(false));
+        } else {
+            assert_eq!(bar, TitleBar::Native);
+            let viewport = super::window_chrome(egui::ViewportBuilder::default(), bar);
+            assert_eq!(viewport.decorations, Some(true));
+        }
+    }
+
+    /// macOS is untouched by this change: its inset title bar with the system traffic lights stays,
+    /// and `window_chrome` still asks for the full-size content view rather than toggling the
+    /// window decorations.
+    #[test]
+    #[cfg(target_os = "macos")]
+    fn macos_keeps_its_inset_title_bar() {
+        let bar = super::desktop_title_bar();
+        assert_eq!(bar, TitleBar::Inset);
+        let viewport = super::window_chrome(egui::ViewportBuilder::default(), bar);
+        assert_eq!(viewport.fullsize_content_view, Some(true));
+        assert_eq!(viewport.title_shown, Some(false));
+    }
+}
+
+#[cfg(test)]
+mod start_tests {
+    use super::opens_new_file;
+
+    #[test]
+    fn the_home_preference_starts_on_home_except_for_control_callers() {
+        assert!(opens_new_file(false, false, false), "a new file by default");
+        assert!(!opens_new_file(false, true, false), "Home when the preference asks");
+        assert!(opens_new_file(false, true, true), "--control still starts with a document");
+        assert!(!opens_new_file(true, false, false), "a first run shows the home screen");
+    }
+}

apps/figcraft/src/recovery.rs

@@ -120,8 +120,7 @@ impl Recovery {
         (0..10).find_map(|n| {
             let dir = root.join(if n == 0 { pid.to_string() } else { format!("{pid}-{n}") });
             std::fs::create_dir_all(&dir).ok()?;
-            let lock = File::options().write(true).create(true).truncate(false).open(dir.join(LOCK)).ok()?;
-            lock.try_lock().ok()?;
+            let lock = lock_folder(&dir).ok()?;
             Some(Self { dir, _lock: lock, written: HashMap::new(), next: 0.0, waiting: Vec::new() })
         })
     }
@@ -250,6 +249,17 @@ impl Recovery {
         self.written.insert(uid, Copy { done: None, flight: Some((vec![revision], writer)) });
     }
 
+    /// Quitting: a normal quit ([`finish`](Self::finish)) when the unsaved-changes question was
+    /// `asked` or nothing is unsaved. Otherwise (macOS's Quit menu ends the app without asking) the
+    /// unsaved documents are copied and the copies stay for the next start, as after a crash.
+    pub fn quit(mut self, s: &Session, asked: bool) {
+        if asked || !s.docs.iter().any(|d| needs_copy(s, d)) {
+            return self.finish();
+        }
+        self.write(s, true);
+        self.settle(s);
+    }
+
     /// A normal quit: the documents were saved or their changes discarded on purpose. (Earlier
     /// runs' copies still waiting for their outcome stay for the next start.)
     pub fn finish(self) {
@@ -282,6 +292,17 @@ fn remove_kept(w: Waiting) {
 /// The extension of the note beside the copy of a document that is one of your online files.
 const ONLINE: &str = "online";
 
+/// How long the startup waits, once, for folder locks that may free themselves (#334).
+#[cfg(unix)]
+const LOCK_WAIT: std::time::Duration = std::time::Duration::from_millis(100);
+
+/// Lock the folder `dir` (`WouldBlock` while another process holds it).
+fn lock_folder(dir: &Path) -> Result<File, std::fs::TryLockError> {
+    let lock = File::options().write(true).create(true).truncate(false).open(dir.join(LOCK)).map_err(std::fs::TryLockError::Error)?;
+    lock.try_lock()?;
+    Ok(lock)
+}
+
 /// The copy at `file` is of one of your online files: join that file again as its owner, keeping
 /// the copy to compare with what arrives. The session, or `None` when the copy isn't one (or its
 /// file isn't recorded any more, or is open already): then it opens as any other copy.
@@ -351,6 +372,7 @@ pub fn recover_all(root: &Path, s: &mut Session) -> Recovered {
             }
         }
     };
+    let (mut free, mut held) = (Vec::new(), Vec::new());
     for e in entries.flatten() {
         let path = e.path();
         if !path.is_dir() {
@@ -358,10 +380,22 @@ pub fn recover_all(root: &Path, s: &mut Session) -> Recovered {
             continue;
         }
         // Still running (another window of the app), or not ours to take.
-        let Ok(lock) = File::options().write(true).create(true).truncate(false).open(path.join(LOCK)) else { continue };
-        if lock.try_lock().is_err() {
-            continue;
+        match lock_folder(&path) {
+            Ok(lock) => free.push((path, lock)),
+            Err(std::fs::TryLockError::WouldBlock) => held.push(path),
+            Err(_) => {}
         }
+    }
+    // A child between its `fork` and its `exec` shares the run's open descriptors, and a `flock`
+    // lasts while any of them is open, so an ended run's folder can look held for a moment. Wait
+    // once, however many folders are held, and try those again (#334). Windows doesn't pass the
+    // lock to child processes.
+    #[cfg(unix)]
+    if !held.is_empty() {
+        std::thread::sleep(LOCK_WAIT);
+        free.extend(held.into_iter().filter_map(|path| lock_folder(&path).ok().map(|lock| (path, lock))));
+    }
+    for (path, lock) in free {
         let lock = Arc::new(lock);
         let files: Vec<PathBuf> = std::fs::read_dir(&path).into_iter().flatten().flatten().map(|f| f.path()).collect();
         for f in &files {

apps/figcraft/src/recovery_tests.rs

@@ -167,6 +167,23 @@ fn a_normal_quit_removes_the_recovered_copies_it_took_over() {
     let _ = std::fs::remove_dir_all(&root);
 }
 
+#[test]
+fn quitting_without_the_unsaved_question_keeps_copies_for_the_next_start() {
+    let root = root("quitunasked");
+    // macOS's Quit menu: nothing asked, so the unsaved document comes back next time.
+    let s = edited();
+    Recovery::start(&root).unwrap().quit(&s, false);
+    let mut next = Session::empty();
+    assert_eq!(recover(&root, &mut next), 1);
+    let _ = std::fs::remove_dir_all(&root);
+    // Asked (saved or discarded on purpose), or nothing unsaved: nothing is left.
+    for (s, asked) in [(edited(), true), (Session::new(), false)] {
+        Recovery::start(&root).unwrap().quit(&s, asked);
+        assert!(std::fs::read_dir(&root).unwrap().next().is_none(), "asked: {asked}");
+    }
+    let _ = std::fs::remove_dir_all(&root);
+}
+
 #[test]
 fn a_run_whose_folder_name_is_still_held_takes_another() {
     let root = root("pidreuse");
@@ -186,6 +203,29 @@ fn a_run_whose_folder_name_is_still_held_takes_another() {
     let _ = std::fs::remove_dir_all(&root);
 }
 
+/// #334: a lock that frees itself is not a run that is still going. A child between its `fork` and
+/// its `exec` inherits the run's open descriptors and a `flock` lasts while any descriptor for the
+/// file is open, so a crashed run's copies must still come back once that child has exec'd.
+#[cfg(unix)]
+#[test]
+fn a_lock_freed_a_moment_later_is_not_a_run_that_is_still_going() {
+    let root = root("fork-window");
+    crashed(&edited(), &root);
+    // Hold the crashed run's folder lock on a second descriptor, the way a child forked before its
+    // exec holds it, and free it shortly after.
+    let lock = std::fs::File::options().write(true).create(true).truncate(false).open(root.join("crashed").join("lock")).unwrap();
+    lock.try_lock().unwrap();
+    let freed = std::thread::spawn(move || {
+        std::thread::sleep(std::time::Duration::from_millis(10));
+        drop(lock);
+    });
+    // The next start waits for that lock rather than reading the run as still going.
+    let mut next = Session::empty();
+    assert_eq!(recover(&root, &mut next), 1, "the copies come back once the lock frees itself");
+    freed.join().unwrap();
+    let _ = std::fs::remove_dir_all(&root);
+}
+
 /// The rectangles in `doc`.
 fn rectangles(doc: &figcraft_engine::doc::Document) -> usize {
     doc.nodes().filter(|n| matches!(n.kind, figcraft_engine::doc::NodeKind::Rectangle)).count()

apps/figcraft/src/services.rs

@@ -167,10 +167,18 @@ fn reveal(path: &Path) -> std::io::Result<()> {
 /// The preferences' file in the config folder.
 const STATE: &str = "state.json";
 
-pub fn save_state(app: &FigApp) {
-    if let Some(dir) = config_dir() {
-        write_prefs(&dir, &app.session.prefs);
+/// Everything quitting keeps, all done when it returns (macOS then ends the process): the
+/// preferences in `dir`, this run's recovery copies ([`Recovery::quit`](crate::recovery::Recovery::quit))
+/// and the live sessions' ends (one this app hosts tells everyone and stops; a joined one leaves).
+pub fn shutdown(app: &mut FigApp, dir: Option<&Path>, recovery: Option<crate::recovery::Recovery>) {
+    if let Some(dir) = dir {
+        write_prefs(dir, &app.session.prefs);
     }
+    // Before the sessions end: a recovered online file's copy waits for its session's outcome.
+    if let Some(r) = recovery {
+        r.quit(&app.session, app.ui.quit);
+    }
+    drop(std::mem::take(&mut app.session.live));
 }
 
 /// Write `prefs` to `dir` atomically (a temporary file renamed over the old one: a crash leaves
@@ -223,12 +231,47 @@ fn picked(pick: impl Future<Output = Option<rfd::FileHandle>> + 'static) -> Dial
     Box::pin(async move { pick.await.map(|f| f.path().to_path_buf()) })
 }
 
+/// How long a clipboard read may wait on the app that copied (Linux and the BSDs).
+#[cfg(all(unix, not(target_os = "macos")))]
+const CLIPBOARD_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(2);
+
+/// Read the clipboard. On Linux and the BSDs the read runs on a helper thread with its own handle
+/// and gives up after [`CLIPBOARD_TIMEOUT`]: a Wayland read waits on the app that copied with no
+/// timeout of its own, so an app that hangs must not hang the window too.
+#[cfg(all(unix, not(target_os = "macos")))]
+fn read_clipboard<T: Send + 'static>(_: &mut arboard::Clipboard, read: fn(&mut arboard::Clipboard) -> Option<T>) -> Option<T> {
+    let (tx, rx) = std::sync::mpsc::channel();
+    std::thread::spawn(move || {
+        let _ = tx.send(arboard::Clipboard::new().ok().and_then(|mut c| read(&mut c)));
+    });
+    rx.recv_timeout(CLIPBOARD_TIMEOUT).ok().flatten()
+}
+
+/// Read the clipboard (the system's own reads don't wait on the app that copied).
+#[cfg(not(all(unix, not(target_os = "macos"))))]
+fn read_clipboard<T>(c: &mut arboard::Clipboard, read: fn(&mut arboard::Clipboard) -> Option<T>) -> Option<T> {
+    read(c)
+}
+
+/// Native Save as filters; other callers keep their existing combined filter.
+fn save_filters<'a>(exts: &'a [&'a str]) -> Vec<(&'static str, &'a [&'a str])> {
+    if exts == ["figcraft", "fig"] {
+        vec![("FigCraft (.figcraft)", &exts[..1]), (figcraft_ui_egui::i18n::tr(".fig (experimental)"), &exts[1..])]
+    } else {
+        vec![("File", exts)]
+    }
+}
+
 impl Services for Desktop {
     fn pick_open(&mut self, title: &str, exts: &[&str]) -> DialogFuture {
         picked(dialog(title).add_filter("Supported files", exts).pick_file())
     }
     fn pick_save(&mut self, title: &str, name: &str, exts: &[&str]) -> DialogFuture {
-        picked(dialog(title).set_file_name(name).add_filter("File", exts).save_file())
+        let mut dialog = dialog(title).set_file_name(name);
+        for (label, extensions) in save_filters(exts) {
+            dialog = dialog.add_filter(label, extensions);
+        }
+        picked(dialog.save_file())
     }
     fn pick_folder(&mut self, title: &str) -> DialogFuture {
         picked(dialog(title).pick_folder())
@@ -239,7 +282,10 @@ impl Services for Desktop {
         }
     }
     fn clipboard_get_text(&mut self) -> Option<String> {
-        self.clipboard.as_mut()?.get_text().ok()
+        read_clipboard(self.clipboard.as_mut()?, |c| c.get_text().ok())
+    }
+    fn clipboard_get_html(&mut self) -> Option<String> {
+        read_clipboard(self.clipboard.as_mut()?, |c| c.get().html().ok())
     }
     fn clipboard_set_png(&mut self, w: u32, h: u32, rgba: &[u8]) {
         if let Some(c) = self.clipboard.as_mut() {
@@ -247,7 +293,7 @@ impl Services for Desktop {
         }
     }
     fn clipboard_get_image(&mut self) -> Option<(u32, u32, Vec<u8>)> {
-        let img = self.clipboard.as_mut()?.get_image().ok()?;
+        let img = read_clipboard(self.clipboard.as_mut()?, |c| c.get_image().ok())?;
         let (w, h) = (u32::try_from(img.width).ok()?, u32::try_from(img.height).ok()?);
         // Refuse absurd sizes (and mismatched buffers) rather than allocate.
         if w == 0 || h == 0 || u64::from(w) * u64::from(h) > 100_000_000 || img.bytes.len() != (w as usize) * (h as usize) * 4 {
@@ -297,3 +343,24 @@ pub fn window_icon() -> Option<egui::IconData> {
     let (w, h) = img.dimensions();
     Some(egui::IconData { rgba: img.into_raw(), width: w, height: h })
 }
+
+#[cfg(test)]
+mod save_filter_tests {
+    use super::save_filters;
+
+    #[test]
+    fn native_and_fig_save_filters_are_separate_with_native_first() {
+        let extensions = ["figcraft", "fig"];
+        assert_eq!(
+            save_filters(&extensions),
+            vec![("FigCraft (.figcraft)", &extensions[..1]), (figcraft_ui_egui::i18n::tr(".fig (experimental)"), &extensions[1..])]
+        );
+    }
+
+    #[test]
+    fn other_save_filters_keep_one_combined_group() {
+        for extensions in [&["figcraft"][..], &["fig"][..], &["png"][..], &["png", "jpg", "webp"][..], &[][..]] {
+            assert_eq!(save_filters(extensions), vec![("File", extensions)]);
+        }
+    }
+}

apps/figcraft/src/services_tests.rs

@@ -82,3 +82,38 @@ fn preferences_are_readable_by_their_owner_only() {
     assert_eq!(mode(&dir.join("state.json")), 0o600);
     let _ = std::fs::remove_dir_all(&dir);
 }
+
+/// A live link that only records the sessions it was told to leave.
+struct Leaves(Arc<Mutex<Vec<u64>>>);
+
+impl figcraft_engine::live::LiveLink for Leaves {
+    fn host(&mut self, _: u64, _: figcraft_engine::live::HostOptions) -> Result<figcraft_engine::live::SessionInfo, String> {
+        Err("not in this test".into())
+    }
+    fn join(&mut self, _: u64, _: &str, _: &str) -> Result<(), String> {
+        Ok(())
+    }
+    fn leave(&mut self, session: u64) {
+        self.0.lock().unwrap().push(session);
+    }
+    fn presence(&mut self, _: u64, _: &figcraft_engine::live::Presence) {}
+    fn send(&mut self, _: u64, _: figcraft_engine::figcraft_collab::message::ClientMsg) {}
+    fn poll(&mut self) -> Vec<(u64, figcraft_engine::live::Event)> {
+        Vec::new()
+    }
+}
+
+#[test]
+fn quitting_keeps_the_preferences_and_ends_the_live_sessions() {
+    let dir = root("shutdown");
+    let mut fig = start(&dir);
+    let left = Arc::new(Mutex::new(Vec::new()));
+    fig.session.live.install(Box::new(Leaves(left.clone())));
+    let joined = fig.run("collab.join", json!({"link": "ws://127.0.0.1:9/?file=f1&token=EditSecretEditSecret00"})).unwrap();
+    fig.session.prefs.user_name = "Ada".into();
+    crate::services::shutdown(&mut fig, Some(&dir), None);
+    assert_eq!(*left.lock().unwrap(), [joined["session"].as_u64().unwrap()], "the session was left");
+    assert!(!fig.session.live.available(), "nothing is left to send on");
+    assert_eq!(start(&dir).session.prefs.user_name, "Ada", "the preferences were kept");
+    let _ = std::fs::remove_dir_all(&dir);
+}

contributors/people.toml

@@ -24,6 +24,10 @@ display_name = "VanTan"
 real_name = "Tyler Jennings"
 display_name = "tylerjenningsw"
 
+[people.SiadeLucas]
+real_name = "Siade Lucas"
+sync_github_name = true
+
 [people.Silvertree2010]
 display_name = "Netter"
 sync_github_name = false
@@ -37,6 +41,11 @@ real_name = "Justin John"
 
 [people.Losminek]
 
+[people.alrifatsabbir]
+real_name = "Al Rifat Sabbir"
+display_name = "Al Rifat Sabbir"
+sync_github_name = true
+
 [people.RevDonz]
 
 [people.Nael-Nathanael]
@@ -44,3 +53,21 @@ sync_github_name = true
 
 [people.volkovskey]
 real_name = "Andrii Volkov"
+
+[people.marcoarnulfo]
+real_name = "Marco Arnulfo"
+display_name = "Marco Arnulfo"
+sync_github_name = false
+
+[people.krinry]
+display_name = "krinry"
+sync_github_name = true
+
+[people.pechnikov2026-star]
+sync_github_name = true
+
+[people.MortenHusted]
+sync_github_name = true
+
+[people.AganzeFelicite]
+sync_github_name = true

crates/collab-net/src/driver.rs

@@ -16,7 +16,7 @@ use figcraft_engine::live::{Event, Status};
 use web_time::Instant;
 
 use crate::inbox::Inbox;
-use crate::join::{GuestConfig, Next, Outcome, Resuming, Seen, Taken, after, closed, hello, resolved, take, unresolved};
+use crate::join::{GuestConfig, Next, Outcome, Resuming, Seen, Taken, after, closed, hello, resolved, take, too_large, unresolved};
 use crate::throttle::{PRESENCE_INTERVAL, Throttle, earliest};
 
 /// A WebSocket the driver opens, writes and closes; what it receives comes back through the
@@ -114,6 +114,9 @@ impl<S: Socket> Driver<S> {
     /// A binary message from the host.
     pub(crate) fn message(&mut self, bytes: &[u8], now: Instant) {
         let Some(c) = self.conn.as_mut() else { return };
+        if bytes.len() > self.cfg.limits.max_server_message {
+            return self.end(too_large(&self.cfg.limits), now);
+        }
         c.last_heard = now;
         let taken = match message::decode::<ServerMsg>(bytes, self.cfg.limits.max_server_message) {
             // The join code's answer: join the file it opens, on a new connection.

crates/collab-net/src/driver_tests.rs

@@ -10,7 +10,7 @@ use std::time::{Duration, Instant};
 use figcraft_collab::message::{self, ClientMsg, Presence, ServerMsg};
 use figcraft_collab::{Client, Limits, Outgoing, Server};
 use figcraft_doc::{Document, NodeId};
-use figcraft_engine::live::{Event, Status};
+use figcraft_engine::live::{Event, Status, TOO_LARGE_TO_JOIN};
 use tungstenite::protocol::WebSocket;
 use tungstenite::{Bytes, Message};
 
@@ -262,6 +262,15 @@ fn refusals_and_the_end_of_the_session_are_final() {
         assert!(d.done());
         assert!(matches!(statuses(&inbox.drain()).last(), Some(Status::Failed { reason }) if reason.starts_with("The host refused")));
     }
+    // A message over the size limit: the file is too large for this app, not refused by the host.
+    let inbox = Inbox::new(Arc::new(|| {}));
+    let mut cfg = GuestConfig::new(invite(), "Ada".into());
+    cfg.limits.max_server_message = 2 << 20;
+    let mut d = Driver::start(Script::default(), cfg, inbox.clone(), t0);
+    d.opened(t0);
+    d.message(&vec![0; (2 << 20) + 1], t0);
+    assert!(d.done());
+    assert!(matches!(statuses(&inbox.drain()).last(), Some(Status::Failed { reason }) if *reason == TOO_LARGE_TO_JOIN.replace("{mb}", "2")));
 }
 
 #[test]

crates/collab-net/src/guest.rs

@@ -26,7 +26,7 @@ use tungstenite::{Bytes, Message};
 use crate::inbox::Inbox;
 use crate::invite::{Endpoint, Invite};
 pub use crate::join::GuestConfig;
-use crate::join::{Next, Outcome, Resuming, Seen, Taken, after, closed, hello, resolved, take, unresolved};
+use crate::join::{Next, Outcome, Resuming, Seen, Taken, after, closed, hello, resolved, take, too_large, unresolved};
 use crate::manage;
 use crate::net::{Duplex, NetLimits, config, open, shutdown};
 use crate::throttle::{PRESENCE_INTERVAL, Throttle, earliest};
@@ -367,7 +367,7 @@ fn read_loop(mut ws: WebSocket<Duplex>, ctx: &ReaderCtx) {
             Ok(Message::Close(f)) => break f.map_or_else(|| closed(0, ""), |f| closed(f.code.into(), &f.reason)),
             Ok(Message::Text(_)) => break Outcome::Refused("the host sent a text message".into()),
             Ok(_) => {}
-            Err(tungstenite::Error::Capacity(_)) => break Outcome::Refused("the host sent a message over the size limit".into()),
+            Err(tungstenite::Error::Capacity(_)) => break too_large(&ctx.cfg.limits),
             Err(e) => break Outcome::Retry(e.to_string()),
         }
     };

crates/collab-net/src/invite.rs

@@ -203,7 +203,7 @@ fn pairs(query: &str) -> Result<Vec<(String, String)>, String> {
 fn with_port(authority: &str, default: u16) -> String {
     let has_port = match authority.rsplit_once(':') {
         // `[v6]` alone has colons inside the brackets only.
-        Some((h, p)) => !(h.starts_with('[') && !h.ends_with(']')) && !p.contains(']'),
+        Some((h, p)) => (!h.starts_with('[') || h.ends_with(']')) && !p.contains(']'),
         None => false,
     };
     if has_port { authority.to_string() } else { format!("{authority}:{default}") }
@@ -220,7 +220,8 @@ fn valid_host(s: &str) -> bool {
         return true;
     }
     let Some((name, port)) = s.rsplit_once(':') else { return false };
-    port.parse::<u16>().is_ok_and(|p| p != 0)
+    port.bytes().all(|b| b.is_ascii_digit())
+        && port.parse::<u16>().is_ok_and(|p| p != 0)
         && (1..=253).contains(&name.len())
         && name.bytes().all(|b| b.is_ascii_alphanumeric() || b == b'-' || b == b'.')
         && !name.starts_with(['-', '.'])
@@ -239,6 +240,9 @@ fn percent_decode(s: &str) -> Option<String> {
     while let Some(&b) = bytes.get(i) {
         if b == b'%' {
             let hex = bytes.get(i + 1..i + 3)?;
+            if !hex.iter().all(u8::is_ascii_hexdigit) {
+                return None;
+            }
             out.push(u8::from_str_radix(std::str::from_utf8(hex).ok()?, 16).ok()?);
             i += 3;
         } else {

crates/collab-net/src/invite_tests.rs

@@ -123,3 +123,19 @@ proptest! {
         prop_assert_eq!(Invite::parse(&i.url()), Ok(i));
     }
 }
+
+#[test]
+fn plus_or_sign_inside_a_percent_escape_is_broken() {
+    assert!(Endpoint::parse("ws://example.org/a/?key=%41").is_ok());
+    for bad in ["%+1", "%-1", "%1", "%+a"] {
+        assert!(Endpoint::parse(&format!("ws://example.org/a/?key={bad}")).is_err(), "{bad}");
+    }
+}
+
+#[test]
+fn port_must_be_all_digits() {
+    assert!(Endpoint::parse("ws://localhost:80/").is_ok());
+    for bad in ["ws://localhost:+80/", "ws://localhost:-80/", "ws://localhost:/"] {
+        assert!(Endpoint::parse(bad).is_err(), "accepted {bad}");
+    }
+}

crates/collab-net/src/join.rs

@@ -7,7 +7,7 @@ use std::time::Duration;
 
 use figcraft_collab::Client;
 use figcraft_collab::message::{ClientMsg, Peer, Resume, ServerMsg};
-use figcraft_engine::live::{Event, Role, SessionInfo, Status};
+use figcraft_engine::live::{Event, Role, SessionInfo, Status, TOO_LARGE_TO_JOIN};
 
 use crate::inbox::Inbox;
 use crate::invite::Invite;
@@ -95,6 +95,12 @@ pub(crate) fn unresolved(cfg: &GuestConfig, outcome: Outcome) -> Outcome {
     })
 }
 
+/// The host sent a message over this app's size limit (the file's welcome, usually): final, and
+/// not the host's doing.
+pub(crate) fn too_large(limits: &NetLimits) -> Outcome {
+    Outcome::Failed(TOO_LARGE_TO_JOIN.replace("{mb}", &(limits.max_server_message >> 20).to_string()))
+}
+
 /// The server's answer to the join code: the invite is whole now.
 pub(crate) fn resolved(cfg: &mut GuestConfig, file: String, token: String) -> Result<(), Outcome> {
     if !crate::invite::valid_id(&file, 1, 64) || !crate::invite::valid_id(&token, 16, 128) {

crates/collab-net/src/limits.rs

@@ -12,7 +12,9 @@ pub struct NetLimits {
     /// before: its hello.
     pub max_client_message: usize,
     pub max_hello: usize,
-    /// Largest message a client accepts from the host (a welcome carries the whole document).
+    /// Largest message a client accepts from the host (a welcome carries the whole document): 1 GiB,
+    /// room for any file up to 1023 MiB and well past the servers' defaults, while a hostile server
+    /// (any link can name one) can't make the app or a browser tab buffer more than that.
     pub max_server_message: usize,
     /// Messages a client may send per second on average, and in a burst; beyond that it is
     /// disconnected.
@@ -61,7 +63,7 @@ impl Default for NetLimits {
             max_connections: 64,
             max_client_message: figcraft_collab::Limits::default().max_message_bytes,
             max_hello: 64 << 10,
-            max_server_message: figcraft_collab::Limits::default().max_message_bytes,
+            max_server_message: 1 << 30,
             rate: 100.0,
             burst: 400.0,
             hello_timeout: Duration::from_secs(10),

crates/collab-net/src/loopback_tests.rs

@@ -10,7 +10,7 @@ use std::time::{Duration, Instant};
 use figcraft_collab::message::{self, ClientMsg, Hello, Presence, ServerMsg, Signal};
 use figcraft_collab::{Client, Limits};
 use figcraft_doc::{Document, NodeId};
-use figcraft_engine::live::{Event, PEOPLE, Status};
+use figcraft_engine::live::{Event, PEOPLE, Status, TOO_LARGE_TO_JOIN};
 use tungstenite::protocol::WebSocket;
 use tungstenite::{Bytes, Message};
 
@@ -642,3 +642,31 @@ fn the_host_removes_someone_and_they_cant_come_back() {
     host.stop();
     assert_eq!(host.connections(), 0);
 }
+
+#[test]
+fn a_welcome_over_the_size_limit_says_the_file_is_too_large() {
+    let mut doc = Document::new("B".repeat(1 << 20));
+    doc.repair();
+    let probe = Probe::new();
+    let cfg = HostConfig {
+        addr: SocketAddr::from(([127, 0, 0, 1], 0)),
+        any_port_if_taken: false,
+        file: FILE.into(),
+        token: TOKEN.into(),
+        doc,
+        name: "Hana".into(),
+        limits: fast_limits(),
+        core: Limits::default(),
+    };
+    let mut host = Host::start(cfg, probe.inbox.clone()).unwrap();
+    let invite = Invite::new(host.addr().to_string(), FILE, TOKEN);
+
+    let mut guest_cfg = quick(GuestConfig::new(invite, "Ada".into()));
+    guest_cfg.limits = NetLimits { max_server_message: 1 << 20, ..fast_limits() };
+    let mut gp = Probe::new();
+    let _g = Guest::start(guest_cfg, gp.inbox.clone()).unwrap();
+    let too_large = TOO_LARGE_TO_JOIN.replace("{mb}", "1");
+    gp.wait("the file too large to join", |e| e.iter().any(|ev| matches!(ev, Event::Status(Status::Failed { reason }) if *reason == too_large)));
+    assert!(!welcomed(&gp.events));
+    host.stop();
+}

crates/collab/src/change.rs

@@ -87,8 +87,9 @@ macro_rules! node_props {
     ($($variant:ident => $field:ident),* $(,)?) => {
         /// A node property: the tree position (`parent`, `position`) or one saved field of
         /// [`Node`]. List-valued fields (fills, text runs, vector networks…) are one property each,
-        /// replaced whole (three-way merges line fills, strokes and effects up item by item, see
-        /// [`merge`](crate::merge)). New properties go at the end (the binary form numbers them).
+        /// replaced whole (three-way merges line the lists whose items stand on their own, such as
+        /// fills, up item by item, see [`merge`](crate::merge)). New properties go at the end (the
+        /// binary form numbers them).
         #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
         #[serde(rename_all = "camelCase")]
         pub enum Prop {

crates/collab/src/code.rs

@@ -135,7 +135,7 @@ impl Local {
         let query = link.strip_prefix("figcraft://join?")?;
         let get = |key: &str| query.split('&').find_map(|kv| kv.split_once('=').filter(|(k, _)| *k == key).map(|(_, v)| v));
         let addr: std::net::SocketAddrV4 = get("host")?.parse().ok()?;
-        let hex = get("token")?.strip_prefix(TOKEN_PREFIX).filter(|h| h.len() == 11)?;
+        let hex = get("token")?.strip_prefix(TOKEN_PREFIX).filter(|h| h.len() == 11 && h.bytes().all(|b| b.is_ascii_hexdigit()))?;
         let local = Local { ip: *addr.ip(), port: addr.port(), secret: u64::from_str_radix(hex, 16).ok()? };
         (get("file") == Some(LOCAL_FILE) && local.port != 0).then_some(local)
     }

crates/collab/src/code_tests.rs

@@ -104,6 +104,7 @@ fn only_local_session_links_have_a_code() {
         "figcraft://join?host=[::1]:47900&file=local&token=local-0123456789a",
         "figcraft://join?host=192.168.1.20:0&file=local&token=local-0123456789a",
         "figcraft://join?host=192.168.1.20:47900&file=local&token=local-0123456789az",
+        "figcraft://join?host=10.0.0.1:47900&file=local&token=local-+0000000001",
         "figcraft://join?server=wss://example.org/&file=local&token=local-0123456789a",
         "ws://192.168.1.20:47900/?file=local&token=local-0123456789a",
         "",

crates/collab/src/merge.rs

@@ -4,12 +4,13 @@
 //!
 //! A conflict is the same property (or document-level entry) changed on both sides to different
 //! values, or a layer deleted on one side while the other side edited it or something inside it
-//! (including adding layers to it or moving layers into or out of it). Fills, strokes and effects
-//! merge item by item: both sides changing different items of the list (or one adding items at its
-//! end) is no conflict, only the same item changed both ways or the list shortened on a side
-//! while the other changed it. Nothing that conflicts is
-//! merged until it is resolved: each conflict is resolved for one side, and the other side's
-//! changes to it are left out. Everything else from both sides is kept.
+//! (including adding layers to it or moving layers into or out of it). The layer lists whose items
+//! stand on their own (fills, strokes, effects, layout grids, export settings, guides, prototype
+//! interactions, accessibility annotations and Dev Mode resources) merge item by item: both sides
+//! changing different items of the list (or one adding items at its end) is no conflict, only the
+//! same item changed both ways or the list shortened on a side while the other changed it. Nothing
+//! that conflicts is merged until it is resolved: each conflict is resolved for one side, and the
+//! other side's changes to it are left out. Everything else from both sides is kept.
 
 use std::collections::{BTreeMap, BTreeSet};
 use std::fmt;
@@ -159,8 +160,23 @@ fn by_key(changes: &[Change]) -> BTreeMap<Key, Vec<usize>> {
     out
 }
 
-/// List properties whose items merge one by one.
-const PER_ITEM: &[Prop] = &[Prop::Fills, Prop::Strokes, Prop::Effects];
+/// List properties whose items merge one by one: the items stand on their own, so both sides
+/// changing different ones (or one side adding at its end) is no conflict. Sets and keyed maps
+/// (`bound`, `varModes`, `overrides`, `propRefs`, `pluginData`) are not here: their items line up
+/// by key, not by position.
+const PER_ITEM: &[Prop] = &[
+    Prop::Fills,
+    Prop::Strokes,
+    Prop::Effects,
+    Prop::Grids,
+    Prop::Exports,
+    Prop::Guides,
+    Prop::Interactions,
+    Prop::Annotations,
+    // Not `CodeLinks`: there is one per language, and lining them up by position could leave two
+    // for one language (the second hidden), so they merge whole.
+    Prop::DevResources,
+];
 
 /// Both sides' writes `b` and `m` of list property `key` merged item by item against the base
 /// (see [`merge_items`]); `None` when `key` isn't such a list or the writes conflict.

crates/collab/src/merge_list_tests.rs

@@ -1,8 +1,10 @@
-//! Fills, strokes and effects merge item by item: different items changed on each side merge,
-//! the same item changed both ways conflicts.
+//! The layer lists whose items stand on their own (fills, strokes, effects, layout grids, export
+//! settings, guides, prototype interactions, accessibility annotations and Dev Mode resources)
+//! merge item by item: different items changed on each side merge, the same item changed both ways
+//! conflicts.
 
 use figcraft_color::{Color, Paint};
-use figcraft_doc::{Document, Effect, NodeId, NodeKind};
+use figcraft_doc::{Document, Effect, LayoutGrid, NodeId, NodeKind, proto};
 use serde_json::{Value, json};
 
 use crate::merge::{Key, Side, merge_items, plan};
@@ -100,19 +102,113 @@ fn the_same_item_changed_both_ways_conflicts() {
 }
 
 #[test]
-fn other_lists_still_conflict_as_a_whole() {
-    // Docs silent: lists other than fills, strokes and effects (export settings here) still
-    // conflict whole when both sides change them.
+fn the_other_item_lists_merge_one_by_one_too() {
+    // Layout grids, export settings, guides, accessibility annotations and Dev Mode resources are
+    // item lists like fills: both sides changing different items merges.
     let (mut base, _, _, r) = files();
     let export = |suffix: &str| figcraft_doc::ExportSetting { suffix: suffix.into(), ..Default::default() };
-    base.get_mut(r).unwrap().exports = vec![export("@1"), export("@2")];
+    let guide = |vertical: bool, offset: f64| figcraft_doc::Guide { vertical, offset };
+    let annot = |label: &str| figcraft_doc::Annotation { label: label.into(), properties: Vec::new(), category: None };
+    let grid = |size: f64| LayoutGrid { size, ..Default::default() };
+    let res = |url: &str| figcraft_doc::DevResource { url: url.into(), name: String::new() };
+    let n = base.get_mut(r).unwrap();
+    n.exports = vec![export("@1"), export("@2")];
+    n.guides = vec![guide(true, 10.0), guide(false, 20.0)];
+    n.annotations = vec![annot("a1"), annot("a2")];
+    n.grids = vec![grid(10.0), grid(20.0)];
+    n.dev_resources = vec![res("https://a.test"), res("https://b.test")];
     let (mut branch, mut main) = (base.clone(), base.clone());
     branch.set_client_id(base.highest_id_space() + 1);
-    branch.get_mut(r).unwrap().exports[0] = export("@b");
-    main.get_mut(r).unwrap().exports[1] = export("@m");
+    // The branch changes the first item of each list; main the second.
+    let b = branch.get_mut(r).unwrap();
+    (b.exports[0].suffix, b.guides[0].offset, b.annotations[0].label, b.grids[0].size, b.dev_resources[0].url) =
+        ("@b".into(), 11.0, "b1".into(), 12.0, "https://branch.test".into());
+    let m = main.get_mut(r).unwrap();
+    (m.exports[1].suffix, m.guides[1].offset, m.annotations[1].label, m.grids[1].size, m.dev_resources[1].url) =
+        ("@m".into(), 22.0, "m2".into(), 24.0, "https://main.test".into());
+    both_ways(&base, &branch, &main, |doc| {
+        let n = doc.node(r).unwrap();
+        let suffixes: Vec<&str> = n.exports.iter().map(|e| e.suffix.as_str()).collect();
+        assert_eq!(suffixes, ["@b", "@m"], "export settings");
+        let offsets: Vec<f64> = n.guides.iter().map(|g| g.offset).collect();
+        assert_eq!(offsets, [11.0, 22.0], "guides");
+        let labels: Vec<&str> = n.annotations.iter().map(|a| a.label.as_str()).collect();
+        assert_eq!(labels, ["b1", "m2"], "annotations");
+        let sizes: Vec<f64> = n.grids.iter().map(|g| g.size).collect();
+        assert_eq!(sizes, [12.0, 24.0], "layout grids");
+        let urls: Vec<&str> = n.dev_resources.iter().map(|d| d.url.as_str()).collect();
+        assert_eq!(urls, ["https://branch.test", "https://main.test"], "dev resources");
+    });
+}
+
+#[test]
+fn the_same_item_of_another_list_changed_both_ways_conflicts() {
+    let (mut base, _, _, r) = files();
+    let link = |language: &str| figcraft_doc::CodeLink { language: language.into(), ..Default::default() };
+    let n = base.get_mut(r).unwrap();
+    n.exports = vec![
+        figcraft_doc::ExportSetting { suffix: "@1".into(), ..Default::default() },
+        figcraft_doc::ExportSetting { suffix: "@2".into(), ..Default::default() },
+    ];
+    n.code_links = vec![link("react"), link("vue")];
+    let (mut branch, mut main) = (base.clone(), base.clone());
+    branch.set_client_id(base.highest_id_space() + 1);
+    branch.get_mut(r).unwrap().exports[0].suffix = "@b".into();
+    main.get_mut(r).unwrap().exports[0].suffix = "@m".into();
+    // Code links are one per language, not an item list: different links changed still conflict.
+    branch.get_mut(r).unwrap().code_links[0].name = "B".into();
+    main.get_mut(r).unwrap().code_links[1].name = "M".into();
     let p = plan(&base, &branch, &main).unwrap();
-    let keys: Vec<String> = p.conflicts.iter().map(|c| c.key.to_string()).collect();
-    assert_eq!(keys, [format!("{r}/exports")]);
+    let mut keys: Vec<String> = p.conflicts.iter().map(|c| c.key.to_string()).collect();
+    keys.sort();
+    let mut want = [format!("{r}/codeLinks"), format!("{r}/exports")];
+    want.sort();
+    assert_eq!(keys, want);
+}
+
+#[test]
+fn interactions_merge_item_by_item() {
+    let ia = |duration_ms: u32| proto::Interaction {
+        trigger: Default::default(),
+        actions: vec![proto::Action::Back],
+        transition: Default::default(),
+        duration_ms,
+        easing: Default::default(),
+        delay_ms: 0,
+    };
+    let durations = |doc: &Document, r: NodeId| doc.node(r).unwrap().interactions.iter().map(|i| i.duration_ms).collect::<Vec<_>>();
+    let (mut base, _, _, r) = files();
+    base.get_mut(r).unwrap().interactions = vec![ia(100), ia(200)];
+    let fork = || {
+        let (mut branch, main) = (base.clone(), base.clone());
+        branch.set_client_id(base.highest_id_space() + 1);
+        (branch, main)
+    };
+    // The branch changes the first interaction and adds one; main changes the second.
+    let (mut branch, mut main) = fork();
+    branch.get_mut(r).unwrap().interactions[0].duration_ms = 150;
+    branch.get_mut(r).unwrap().interactions.push(ia(300));
+    main.get_mut(r).unwrap().interactions[1].duration_ms = 250;
+    both_ways(&base, &branch, &main, |doc| assert_eq!(durations(doc, r), [150, 250, 300]));
+    // The branch deletes one while main leaves them alone.
+    let (mut branch, mut main) = fork();
+    branch.get_mut(r).unwrap().interactions.remove(0);
+    main.get_mut(r).unwrap().fills[0] = red();
+    both_ways(&base, &branch, &main, |doc| assert_eq!(durations(doc, r), [200]));
+    // The same interaction changed both ways, or one deleted while the other side changed the
+    // list, conflicts.
+    for delete in [false, true] {
+        let (mut branch, mut main) = fork();
+        if delete {
+            branch.get_mut(r).unwrap().interactions.remove(0);
+        } else {
+            branch.get_mut(r).unwrap().interactions[1].duration_ms = 220;
+        }
+        main.get_mut(r).unwrap().interactions[1].duration_ms = 250;
+        let p = plan(&base, &branch, &main).unwrap();
+        let keys: Vec<String> = p.conflicts.iter().map(|c| c.key.to_string()).collect();
+        assert_eq!(keys, [format!("{r}/interactions")], "delete: {delete}");
+    }
 }
 
 #[test]

crates/color/src/lib.rs

@@ -61,7 +61,7 @@ impl<'de> Deserialize<'de> for Color {
 }
 
 fn clamp01(v: f32) -> f32 {
-    if v.is_finite() { v.clamp(0.0, 1.0) } else { 0.0 }
+    if v.is_nan() { 0.0 } else { v.clamp(0.0, 1.0) }
 }
 
 impl Default for Color {
@@ -162,7 +162,13 @@ impl Color {
                     p.parse::<f32>().ok().map(|v| v / 255.0)
                 }
             };
-            let alpha = parts.get(3).and_then(|a| parse_alpha(a)).unwrap_or(1.0);
+            let alpha = match parts.get(3) {
+                Some(a) => parse_alpha(a)?,
+                None => 1.0,
+            };
+            if parts.len() > 4 {
+                return None;
+            }
             return Some(Self::new(num(0)?, num(1)?, num(2)?, alpha));
         }
         if let Some(inner) = t.strip_prefix("hsla(").or_else(|| t.strip_prefix("hsl(")).and_then(|r| r.strip_suffix(')')) {
@@ -170,7 +176,13 @@ impl Color {
             let h = parts.first()?.trim_end_matches("deg").parse::<f32>().ok()?;
             let s = parts.get(1)?.trim_end_matches('%').parse::<f32>().ok()? / 100.0;
             let l = parts.get(2)?.trim_end_matches('%').parse::<f32>().ok()? / 100.0;
-            let alpha = parts.get(3).and_then(|a| parse_alpha(a)).unwrap_or(1.0);
+            let alpha = match parts.get(3) {
+                Some(a) => parse_alpha(a)?,
+                None => 1.0,
+            };
+            if parts.len() > 4 {
+                return None;
+            }
             return Some(Hsl { h, s, l }.to_color().with_alpha(alpha));
         }
         if t == "transparent" {

crates/color/src/tests.rs

@@ -80,7 +80,7 @@ fn blend_names() {
 #[test]
 fn nan_inputs_are_sanitized() {
     let c = Color::new(f32::NAN, 2.0, -1.0, f32::INFINITY);
-    assert_eq!(c.to_rgba8(), [0, 255, 0, 0]);
+    assert_eq!(c.to_rgba8(), [0, 255, 0, 255]);
 }
 
 #[test]
@@ -106,3 +106,21 @@ fn crop_defaults_to_fill_and_roundtrips() {
         assert!((a - b).abs() < 1e-9);
     }
 }
+
+#[test]
+fn infinite_channels_clamp() {
+    let c = Color::parse_css("rgb(1e40, 0, 0)").unwrap();
+    assert_eq!(c.r, 1.0);
+    let c = Color::new(f32::INFINITY, f32::NEG_INFINITY, f32::NAN, f32::INFINITY);
+    assert_eq!((c.r, c.g, c.b, c.a), (1.0, 0.0, 0.0, 1.0));
+}
+
+#[test]
+fn malformed_alpha_or_extra_args_rejected() {
+    assert_eq!(Color::parse_css("rgba(0,0,0,abc)"), None);
+    assert_eq!(Color::parse_css("hsla(0,0%,0%,abc)"), None);
+    assert_eq!(Color::parse_css("rgb(1,2,3,4,5)"), None);
+    assert_eq!(Color::parse_css("hsl(0,0%,0%,0.5,1)"), None);
+    assert_eq!(Color::parse_css("rgb(1,2,3)").unwrap().a, 1.0);
+    assert_eq!(Color::parse_css("rgba(1,2,3,0.5)").unwrap().a, 0.5);
+}

crates/doc/src/geometry.rs

@@ -51,6 +51,10 @@ pub fn is_closed(n: &Node) -> bool {
     }
 }
 
+/// How much further than `tol` a stroke with nothing filled reaches: a thin line or stroke-only path
+/// is hard to land on with the plain tolerance, so it gets a wider band (5 screen px for the usual 2 px tolerance).
+const STROKE_REACH: f64 = 2.5;
+
 /// Whether `pt` hits `n` itself; in `outline` mode (nothing filled on the canvas) a shape only where
 /// its outline is.
 fn hits_node_itself(doc: &Document, id: NodeId, n: &Node, pt: Point, tol: f64, outline: bool) -> bool {
@@ -62,7 +66,7 @@ fn hits_node_itself(doc: &Document, id: NodeId, n: &Node, pt: Point, tol: f64, o
         NodeKind::Group | NodeKind::BooleanOp { .. } | NodeKind::Page { .. } => false,
         NodeKind::Text(_) | NodeKind::Slice => n.local_rect().inflate(tol_l, tol_l).contains(lp),
         NodeKind::Line => {
-            let half = (n.stroke.weight / 2.0).max(tol_l);
+            let half = (n.stroke.weight / 2.0).max(tol_l * STROKE_REACH);
             lp.x >= -half && lp.x <= n.width + half && lp.y.abs() <= half
         }
         NodeKind::Frame | NodeKind::Component { .. } | NodeKind::ComponentSet { .. } | NodeKind::Instance { .. } | NodeKind::Section { .. } => {
@@ -78,7 +82,9 @@ fn hits_path(n: &Node, path: &BezPath, lp: Point, tol: f64, inside: bool) -> boo
     if inside && (n.fills.iter().any(|f| f.visible) || !n.has_visible_stroke()) {
         return true;
     }
-    let reach = (n.stroke.max_weight() / 2.0).max(tol);
+    // Only a stroke with nothing filled gets the wider band: a filled shape's edge keeps the plain one.
+    let stroke_only = n.has_visible_stroke() && !n.fills.iter().any(|f| f.visible);
+    let reach = (n.stroke.max_weight() / 2.0).max(if stroke_only { tol * STROKE_REACH } else { tol });
     if !path.bounding_box().inflate(reach, reach).contains(lp) {
         return false;
     }

crates/doc/src/lib.rs

@@ -77,17 +77,19 @@ pub enum DocError {
 
 pub type DocResult<T> = Result<T, DocError>;
 
-/// The set of touched node ids, and whether any layer is a mask (worked out when first asked
-/// after a change: hit testing skips its mask checks without one). Never part of equality or
+/// The set of touched node ids, whether any layer is a mask (hit testing skips its mask checks
+/// without one) and the largest background blur radius (renders keep that much overlap between
+/// their bands), both worked out when first asked after a change. Never part of equality or
 /// serialisation.
 #[derive(Clone, Debug, Default)]
-pub struct Dirty(pub std::collections::BTreeSet<NodeId>, std::sync::OnceLock<bool>);
+pub struct Dirty(pub std::collections::BTreeSet<NodeId>, std::sync::OnceLock<bool>, std::sync::OnceLock<f64>);
 
 impl Dirty {
     /// Record node `id` as touched (edited, added or removed).
     fn touch(&mut self, id: NodeId) {
         self.0.insert(id);
         self.1 = std::sync::OnceLock::new();
+        self.2 = std::sync::OnceLock::new();
     }
 }
 
@@ -254,6 +256,11 @@ impl Document {
         *self.dirty.1.get_or_init(|| self.nodes.values().any(|n| n.is_mask))
     }
 
+    /// The largest background blur or glass radius of any layer's effects (0 without any).
+    pub fn max_backdrop_radius(&self) -> f64 {
+        *self.dirty.2.get_or_init(|| self.nodes.values().flat_map(|n| n.effects.iter()).map(Effect::backdrop_radius).fold(0.0, f64::max))
+    }
+
     /// Node ids touched so far (without clearing).
     pub fn dirty(&self) -> &std::collections::BTreeSet<NodeId> {
         &self.dirty.0
@@ -781,6 +788,23 @@ impl Document {
         self.paste_nodes(&src_nodes, &map, id, parent, index)
     }
 
+    /// Deep-copy each of `ids`' subtrees to the end of `parent`, in order, returning the new root
+    /// ids. One id map covers every copy, so references between the copied subtrees (a navigation
+    /// from one copied frame to another) point at the copies.
+    pub fn duplicate_all_into(&mut self, ids: &[NodeId], parent: NodeId) -> DocResult<Vec<NodeId>> {
+        let mut map = BTreeMap::new();
+        let mut trees = Vec::with_capacity(ids.len());
+        for &id in ids {
+            let src_nodes: Vec<Node> = self.subtree(id).into_iter().filter_map(|i| self.node(i).cloned()).collect();
+            for n in &src_nodes {
+                let nid = self.alloc_id();
+                map.insert(n.id, nid);
+            }
+            trees.push((id, src_nodes));
+        }
+        trees.into_iter().map(|(id, src_nodes)| self.paste_nodes(&src_nodes, &map, id, parent, None)).collect()
+    }
+
     /// Insert copies of `nodes` (a subtree rooted at `root`, from this or another document) with ids
     /// remapped by `map`. Interactions, instance references and pattern sources pointing inside the
     /// subtree are remapped too.
@@ -925,21 +949,39 @@ impl Document {
         self.styles.iter().find(|s| s.id == id || s.name == id)
     }
 
-    /// The effective variable modes for a node (walking up its ancestors).
+    /// The effective variable modes for a node: the ones it sets over [`Self::inherited_modes`].
     pub fn modes_for(&self, id: NodeId) -> BTreeMap<CollectionId, ModeId> {
-        let mut out = BTreeMap::new();
-        let mut chain = vec![id];
-        chain.extend(self.ancestors(id));
-        for c in chain.into_iter().rev() {
-            if let Some(n) = self.node(c) {
-                for (k, v) in &n.var_modes {
-                    out.insert(k.clone(), v.clone());
-                }
-            }
+        let mut out = self.inherited_modes(id);
+        if let Some(n) = self.node(id) {
+            out.extend(n.var_modes.iter().map(|(k, v)| (k.clone(), v.clone())));
         }
         out
     }
 
+    /// The modes a node is on where it sets none (Auto): its ancestors', and for an instance the
+    /// ones its main component sets, which are closer than any container's.
+    pub fn inherited_modes(&self, id: NodeId) -> BTreeMap<CollectionId, ModeId> {
+        let mut out = BTreeMap::new();
+        for c in self.ancestors(id).into_iter().rev() {
+            if let Some(n) = self.node(c) {
+                out.extend(self.main_modes(n).chain(&n.var_modes).map(|(k, v)| (k.clone(), v.clone())));
+            }
+        }
+        if let Some(n) = self.node(id) {
+            out.extend(self.main_modes(n).map(|(k, v)| (k.clone(), v.clone())));
+        }
+        out
+    }
+
+    /// The modes an instance's main component sets (none for other layers).
+    fn main_modes<'a>(&'a self, n: &Node) -> impl Iterator<Item = (&'a CollectionId, &'a ModeId)> {
+        let main = match n.kind {
+            NodeKind::Instance { component, .. } => self.node(component),
+            _ => None,
+        };
+        main.into_iter().flat_map(|m| &m.var_modes)
+    }
+
     /// Check structural invariants (used by tests and after loading untrusted files).
     pub fn validate(&self) -> Vec<String> {
         let mut issues = Vec::new();
@@ -1100,8 +1142,14 @@ impl Document {
     /// mask with the layers above it up to the next mask, or a single layer. An auto layout frame
     /// whose first child paints on top paints the runs in reverse (see [`Node::paint_order`]).
     pub fn paint_runs(&self, n: &Node) -> Vec<std::ops::Range<usize>> {
-        let kids = &n.children;
-        let node = |i: usize| kids.get(i).and_then(|k| self.node(*k));
+        let kids: Vec<Option<&Node>> = n.children.iter().map(|k| self.node(*k)).collect();
+        Self::paint_runs_of(&kids, n.layout.as_ref().is_some_and(|l| l.reverse_z))
+    }
+
+    /// [`Self::paint_runs`] of children already looked up (`None`: not in the document), last run
+    /// first when `reverse_z`.
+    pub fn paint_runs_of(kids: &[Option<&Node>], reverse_z: bool) -> Vec<std::ops::Range<usize>> {
+        let node = |i: usize| kids.get(i).copied().flatten();
         let mut runs = Vec::new();
         let mut i = 0;
         while i < kids.len() {
@@ -1114,7 +1162,7 @@ impl Document {
             runs.push(i..j);
             i = j;
         }
-        if n.layout.as_ref().is_some_and(|l| l.reverse_z) {
+        if reverse_z {
             runs.reverse();
         }
         runs

crates/doc/src/proto.rs

@@ -860,7 +860,35 @@ pub struct Device {
 
 impl PrototypeSettings {
     /// The devices to pick from ("None" presents the frame at its own size).
-    pub const DEVICES: [Device; 6] = [
+    pub const DEVICES: [Device; 19] = [
+        Device {
+            name: "iPhone 17",
+            width: 402.0,
+            height: 874.0,
+            rotates: true,
+            colors: &[c("Black", 0x38, 0x39, 0x3D), c("White", 0xE9, 0xE9, 0xE5)],
+        },
+        Device {
+            name: "iPhone 17 Pro",
+            width: 402.0,
+            height: 874.0,
+            rotates: true,
+            colors: &[c("Black", 0x38, 0x39, 0x3D), c("Silver", 0xD7, 0xD7, 0xD5)],
+        },
+        Device {
+            name: "iPhone 17 Pro Max",
+            width: 440.0,
+            height: 956.0,
+            rotates: true,
+            colors: &[c("Black", 0x38, 0x39, 0x3D), c("Silver", 0xD7, 0xD7, 0xD5)],
+        },
+        Device {
+            name: "iPhone Air",
+            width: 420.0,
+            height: 912.0,
+            rotates: true,
+            colors: &[c("Black", 0x38, 0x39, 0x3D), c("Silver", 0xD7, 0xD7, 0xD5)],
+        },
         Device {
             name: "iPhone 16",
             width: 393.0,
@@ -874,6 +902,13 @@ impl PrototypeSettings {
                 c("Blue", 0x72, 0x84, 0xD4),
             ],
         },
+        Device {
+            name: "iPhone 16 Pro",
+            width: 402.0,
+            height: 874.0,
+            rotates: true,
+            colors: &[c("Black", 0x3B, 0x3A, 0x38), c("White", 0xEC, 0xEB, 0xE6)],
+        },
         Device {
             name: "iPhone 16 Pro Max",
             width: 440.0,
@@ -881,6 +916,55 @@ impl PrototypeSettings {
             rotates: true,
             colors: &[c("Black", 0x3B, 0x3A, 0x38), c("White", 0xEC, 0xEB, 0xE6), c("Natural", 0xBF, 0xB9, 0xAF), c("Sand", 0xC6, 0xAC, 0x8F)],
         },
+        Device {
+            name: "iPhone 16 Plus",
+            width: 430.0,
+            height: 932.0,
+            rotates: true,
+            colors: &[c("Black", 0x3A, 0x3B, 0x3F), c("White", 0xEE, 0xED, 0xE8)],
+        },
+        Device {
+            name: "iPhone 15 Pro",
+            width: 393.0,
+            height: 852.0,
+            rotates: true,
+            colors: &[c("Black", 0x3B, 0x3A, 0x38), c("Silver", 0xD7, 0xD7, 0xD5)],
+        },
+        Device {
+            name: "iPhone 15 Pro Max",
+            width: 430.0,
+            height: 932.0,
+            rotates: true,
+            colors: &[c("Black", 0x3B, 0x3A, 0x38), c("Silver", 0xD7, 0xD7, 0xD5)],
+        },
+        Device {
+            name: "iPhone 15 Plus",
+            width: 430.0,
+            height: 932.0,
+            rotates: true,
+            colors: &[c("Black", 0x3A, 0x3B, 0x3F), c("White", 0xEE, 0xED, 0xE8)],
+        },
+        Device {
+            name: "iPhone 14 Pro",
+            width: 393.0,
+            height: 852.0,
+            rotates: true,
+            colors: &[c("Black", 0x3B, 0x3A, 0x38), c("Silver", 0xD7, 0xD7, 0xD5)],
+        },
+        Device {
+            name: "iPhone 14 Pro Max",
+            width: 430.0,
+            height: 932.0,
+            rotates: true,
+            colors: &[c("Black", 0x3B, 0x3A, 0x38), c("Silver", 0xD7, 0xD7, 0xD5)],
+        },
+        Device {
+            name: "iPhone 14",
+            width: 390.0,
+            height: 844.0,
+            rotates: true,
+            colors: &[c("Black", 0x3A, 0x3B, 0x3F), c("White", 0xEE, 0xED, 0xE8)],
+        },
         Device {
             name: "Android Compact",
             width: 412.0,
@@ -888,6 +972,13 @@ impl PrototypeSettings {
             rotates: true,
             colors: &[c("Black", 0x2E, 0x2F, 0x33), c("Silver", 0xD6, 0xD8, 0xDB), c("Green", 0xA6, 0xC0, 0xA3)],
         },
+        Device {
+            name: "Android Medium",
+            width: 700.0,
+            height: 840.0,
+            rotates: true,
+            colors: &[c("Black", 0x2E, 0x2F, 0x33), c("Silver", 0xD6, 0xD8, 0xDB)],
+        },
         Device {
             name: "iPad mini",
             width: 744.0,

crates/doc/src/tests.rs

@@ -168,6 +168,27 @@ fn text_runs_restyle_and_replace() {
     assert_eq!(t.characters, "");
 }
 
+/// A run that reaches past the text (a file can carry one: nothing clamps `runs` on load)
+/// must not overflow the arithmetic that shifts the runs along, and must not leave the
+/// text unwritable.
+#[test]
+fn text_runs_past_the_text_never_overflow() {
+    let style = || TextStyle { font_style: "Bold".into(), ..Default::default() };
+    for end in [usize::MAX, usize::MAX - 1, 1_000_000] {
+        let mut t = TextData::new("hi");
+        t.runs = vec![StyleRun { start: 0, end, style: style() }];
+        // Typing at the caret, and replacing a selection: both shift `end`.
+        t.replace_range(0, 0, "x");
+        assert_eq!(t.characters, "xhi", "end {end}");
+        t.replace_range(0, 3, "yo");
+        assert_eq!(t.characters, "yo", "end {end}");
+        // The text is still writable and the runs are back inside it.
+        t.replace_range(0, 0, "!");
+        assert_eq!(t.characters, "!yo", "end {end}");
+        assert!(t.runs.iter().all(|r| r.start < r.end && r.end <= t.char_count()), "end {end}: {:?}", t.runs);
+    }
+}
+
 #[test]
 fn text_case() {
     assert_eq!(TextCase::Title.apply("hello big world"), "Hello Big World");
@@ -382,6 +403,46 @@ fn custom_easings() {
     assert_eq!(serde_json::from_value::<Easing>(serde_json::json!("easeInOut")).unwrap(), Easing::EaseInOut);
 }
 
+#[test]
+fn text_style_updates_merge_equal_runs() {
+    let def = TextStyle { font_size: 14.0, ..Default::default() };
+    let mut t = TextData::new("abcd");
+    t.link_text_style(0, 2, &def, "S");
+    t.link_text_style(2, 4, &def, "S");
+    t.restyle(2, 4, |s| s.font_size = 24.0);
+    assert_eq!(t.runs.len(), 2);
+    t.update_text_style("S", &TextStyle { font_size: 24.0, ..def.clone() });
+    let spans = t.spans();
+    assert_eq!(spans.len(), 1);
+    assert_eq!((spans[0].0, spans[0].1), (0, 4));
+    assert_eq!(spans[0].2.font_size, 24.0);
+    assert_eq!(spans[0].2.style_id.as_deref(), Some("S"));
+
+    // Remapping two links to one id merges the runs.
+    let mut t = TextData::new("ab");
+    t.link_text_style(0, 1, &def, "A");
+    t.link_text_style(1, 2, &def, "B");
+    t.map_text_styles(|_| Some("C".into()));
+    assert_eq!(t.spans().len(), 1);
+    assert_eq!(t.style_at(1).style_id.as_deref(), Some("C"));
+
+    // Different values stay separate.
+    let mut t = TextData::new("ab");
+    t.link_text_style(0, 1, &def, "A");
+    t.link_text_style(1, 2, &TextStyle { font_size: 30.0, ..Default::default() }, "B");
+    t.map_text_styles(|_| Some("C".into()));
+    let spans = t.spans();
+    assert_eq!(spans.len(), 2);
+    assert_eq!((spans[0].2.font_size, spans[1].2.font_size), (14.0, 30.0));
+
+    // Unlinking a run equal to the base drops it.
+    let mut t = TextData::new("ab");
+    let base = t.style.clone();
+    t.link_text_style(0, 1, &base, "S");
+    t.map_text_styles(|_| None);
+    assert!(t.runs.is_empty());
+}
+
 #[test]
 fn text_style_empty_range_links_and_unlinks_all() {
     let def = TextStyle { font_style: "Bold".into(), ..Default::default() };

crates/doc/src/text.rs

@@ -60,6 +60,9 @@ impl LetterSpacing {
 }
 
 pub fn trim_num(v: f64) -> String {
+    if v.abs() >= 9.0e18 {
+        return format!("{v}");
+    }
     let r = (v * 100.0).round() / 100.0;
     if r.fract().abs() < 1e-9 { format!("{}", r as i64) } else { format!("{r}") }
 }
@@ -215,6 +218,10 @@ pub struct ParaList {
     pub list: ListStyle,
     /// Nesting level (0 = outermost; plain paragraphs are always 0).
     pub indent: u8,
+    /// A numbered list that starts counting at this paragraph counts from `start_offset + 1`
+    /// (items that go on counting ignore it; other paragraphs are always 0).
+    #[serde(skip_serializing_if = "crate::node::is_default")]
+    pub start_offset: u32,
 }
 
 /// Character style. In runs, every field is an override; `None` means "inherit the base".
@@ -562,7 +569,7 @@ impl TextData {
         }
     }
 
-    /// Drop empty/out-of-range runs and runs equal to the base style.
+    /// Drop empty/out-of-range runs and runs equal to the base style, and merge touching equal runs.
     pub fn normalize(&mut self) {
         let n = self.char_count();
         let base = self.style.clone();
@@ -571,6 +578,14 @@ impl TextData {
             r.end = r.end.min(n);
         }
         self.runs.sort_by_key(|r| r.start);
+        let mut merged: Vec<StyleRun> = Vec::with_capacity(self.runs.len());
+        for r in std::mem::take(&mut self.runs) {
+            match merged.last_mut() {
+                Some(prev) if prev.end == r.start && prev.style == r.style => prev.end = r.end,
+                _ => merged.push(r),
+            }
+        }
+        self.runs = merged;
     }
 
     /// Replace chars `start..end` with `text`, shifting runs (inserted text takes the style at `start`).
@@ -602,7 +617,9 @@ impl TextData {
                 if p <= start {
                     p
                 } else if p >= end {
-                    p - removed + inserted
+                    // Runs of a file that reach past the text (nothing clamps them on load)
+                    // would otherwise overflow here; `normalize` below drops what is left.
+                    p.saturating_sub(removed).saturating_add(inserted)
                 } else {
                     start + inserted
                 }
@@ -627,13 +644,13 @@ impl TextData {
 
     /// Paragraph `p`'s list settings.
     pub fn para_list(&self, p: usize) -> ParaList {
-        self.paragraphs.get(p).copied().unwrap_or(ParaList { list: self.list, indent: 0 })
+        self.paragraphs.get(p).copied().unwrap_or(ParaList { list: self.list, ..ParaList::default() })
     }
 
     /// Spell out every paragraph's list settings in `paragraphs` (and drop extra entries).
     fn fill_paragraphs(&mut self) {
         let n = self.paragraph_count();
-        let fill = ParaList { list: self.list, indent: 0 };
+        let fill = ParaList { list: self.list, ..ParaList::default() };
         self.paragraphs.resize(n, fill);
     }
 
@@ -647,17 +664,23 @@ impl TextData {
     }
 
     /// Apply `f` to the list settings of the paragraphs chars `start..end` touch (plain
-    /// paragraphs stay at level 0, levels stop at [`MAX_LIST_INDENT`]); one style for all with
-    /// no nesting folds back into `list`.
+    /// paragraphs stay at level 0, only numbered ones keep a start, levels stop at
+    /// [`MAX_LIST_INDENT`]); one style for all with no nesting or start folds back into `list`.
     pub fn set_para_lists(&mut self, start: usize, end: usize, f: impl Fn(&mut ParaList)) {
         let (a, b) = self.para_span(start, end);
         self.fill_paragraphs();
         for pl in self.paragraphs.get_mut(a..=b).unwrap_or(&mut []) {
             f(pl);
-            pl.indent = if pl.list == ListStyle::None { 0 } else { pl.indent.min(MAX_LIST_INDENT) };
+            if pl.list == ListStyle::None {
+                pl.indent = 0;
+            }
+            if pl.list != ListStyle::Numbered {
+                pl.start_offset = 0;
+            }
+            pl.indent = pl.indent.min(MAX_LIST_INDENT);
         }
         if let Some(first) = self.paragraphs.first().copied()
-            && first.indent == 0
+            && first == (ParaList { list: first.list, ..ParaList::default() })
             && self.paragraphs.iter().all(|p| *p == first)
         {
             self.list = first.list;
@@ -665,11 +688,12 @@ impl TextData {
         }
     }
 
-    /// The list settings shared by the paragraphs chars `start..end` touch, or None when they differ.
+    /// The list style and level shared by the paragraphs chars `start..end` touch (the first
+    /// one's settings), or None when they differ. Start numbers don't count.
     pub fn common_para_list(&self, start: usize, end: usize) -> Option<ParaList> {
         let (a, b) = self.para_span(start, end);
         let first = self.para_list(a);
-        (a..=b).all(|p| self.para_list(p) == first).then_some(first)
+        (a..=b).all(|p| self.para_list(p).list == first.list && self.para_list(p).indent == first.indent).then_some(first)
     }
 
     /// Link chars `start..end` (all of them when the range is empty or the whole text) to text
@@ -739,6 +763,15 @@ impl TextData {
 mod case_tests {
     use super::*;
 
+    #[test]
+    fn trim_num_prints_huge_whole_numbers() {
+        assert_eq!(trim_num(1e19), "10000000000000000000");
+        assert_eq!(trim_num(-1e19), "-10000000000000000000");
+        assert_eq!(trim_num(12.0), "12");
+        let v = 12345678901234567890.0_f64;
+        assert_eq!(trim_num(v).parse::<f64>().unwrap(), v);
+    }
+
     #[test]
     fn title_case_respects_context() {
         assert_eq!(TextCase::Title.apply("hello wORLD don't 3d x-ray"), "Hello WORLD Don't 3d X-Ray");
@@ -772,4 +805,29 @@ mod case_tests {
         assert_eq!(st.variations.keys().collect::<Vec<_>>(), ["wdth"]);
         assert!(valid_axis_tag("wght") && !valid_axis_tag("weight"));
     }
+
+    #[test]
+    fn list_starts_load_from_old_files_and_follow_edits() {
+        use ListStyle::{Bulleted as B, None as P, Numbered as N};
+        // Files written before start numbers load with none, and write the same bytes.
+        let old = r#"{"list":"numbered","indent":1}"#;
+        let pl: ParaList = serde_json::from_str(old).unwrap();
+        assert_eq!(pl, ParaList { list: N, indent: 1, start_offset: 0 });
+        assert_eq!(serde_json::to_string(&pl).unwrap(), old);
+        // One numbered paragraph with a start keeps it (it doesn't fold into `list`).
+        let mut t = TextData { characters: "Next".into(), ..Default::default() };
+        t.set_para_lists(0, 0, |p| *p = ParaList { list: N, indent: 0, start_offset: 1 });
+        assert_eq!(t.para_list(0), ParaList { list: N, indent: 0, start_offset: 1 });
+        // Enter copies it to the new item; different starts don't make the list mixed.
+        t.replace_range(4, 4, "\nMore");
+        assert_eq!(t.para_list(1).start_offset, 1);
+        t.set_para_lists(5, 5, |p| p.start_offset = 0);
+        assert!(t.common_para_list(0, t.char_count()).is_some_and(|p| p.list == N));
+        // Bullets have no number, so no start.
+        t.set_para_lists(0, 0, |p| *p = ParaList { list: B, indent: 1, start_offset: 4 });
+        assert_eq!(t.para_list(0), ParaList { list: B, indent: 1, start_offset: 0 });
+        // A plain paragraph has none.
+        t.set_para_lists(0, 0, |p| p.list = P);
+        assert_eq!(t.para_list(0), ParaList::default());
+    }
 }

crates/doc/src/vector.rs

@@ -468,9 +468,9 @@ impl VectorNetwork {
         start_dir(&self.outward(seg, at_a)?)
     }
 
-    /// Whether any point has a stroke cap or join of its own.
-    pub fn has_point_styles(&self) -> bool {
-        self.vertices.iter().any(|v| v.cap.is_some() || v.join.is_some())
+    /// Whether any point has a stroke cap of its own or a join other than the layer's `layer_join`.
+    pub fn has_point_styles(&self, layer_join: StrokeJoin) -> bool {
+        self.vertices.iter().any(|v| v.cap.is_some() || v.join.is_some_and(|j| j != layer_join))
     }
 
     /// The fill path: every region's loops.

crates/engine/Cargo.toml

@@ -20,6 +20,7 @@ figcraft-render = { workspace = true }
 figcraft-format = { workspace = true }
 figcraft-svg = { workspace = true }
 figcraft-pdf = { workspace = true }
+craft-docpath = { workspace = true }
 figcraft-plugin = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }

crates/engine/clippy.toml

@@ -0,0 +1,39 @@
+# The workspace settings (../../clippy.toml; clippy reads only the nearest file), plus the engine's
+# own rule: shipped engine code reaches the file system only through `file_access`, which enforces
+# the automation roots (#715), so every command is confined without a check of its own.
+allow-unwrap-in-tests = true
+allow-expect-in-tests = true
+allow-panic-in-tests = true
+too-many-arguments-threshold = 10
+disallowed-methods = [
+    { path = "std::fs::read", reason = "use file_access::read (automation roots)" },
+    { path = "std::fs::read_to_string", reason = "use file_access::read (automation roots)" },
+    { path = "std::fs::write", reason = "use file_access::write (automation roots)" },
+    { path = "std::fs::metadata", reason = "use file_access::metadata (automation roots)" },
+    { path = "std::fs::symlink_metadata", reason = "use file_access (automation roots)" },
+    { path = "std::fs::read_dir", reason = "use file_access::read_dir (automation roots)" },
+    { path = "std::fs::canonicalize", reason = "use file_access (automation roots)" },
+    { path = "std::fs::copy", reason = "use file_access (automation roots)" },
+    { path = "std::fs::rename", reason = "use file_access (automation roots)" },
+    { path = "std::fs::create_dir", reason = "use file_access::create_dir_all (automation roots)" },
+    { path = "std::fs::create_dir_all", reason = "use file_access::create_dir_all (automation roots)" },
+    { path = "std::fs::remove_file", reason = "use file_access (automation roots)" },
+    { path = "std::fs::remove_dir", reason = "use file_access (automation roots)" },
+    { path = "std::fs::remove_dir_all", reason = "use file_access (automation roots)" },
+    { path = "std::fs::hard_link", reason = "use file_access (automation roots)" },
+    { path = "std::fs::File::open", reason = "use file_access::open (automation roots)" },
+    { path = "std::fs::File::create", reason = "use file_access::write (automation roots)" },
+    { path = "std::fs::File::create_new", reason = "use file_access::write (automation roots)" },
+    { path = "std::fs::OpenOptions::open", reason = "use file_access (automation roots)" },
+    { path = "std::path::Path::exists", reason = "use file_access::exists (automation roots)" },
+    { path = "std::path::Path::try_exists", reason = "use file_access::exists (automation roots)" },
+    { path = "std::path::Path::is_file", reason = "use file_access::metadata (automation roots)" },
+    { path = "std::path::Path::is_dir", reason = "use file_access::is_dir (automation roots)" },
+    { path = "std::path::Path::metadata", reason = "use file_access::metadata (automation roots)" },
+    { path = "std::path::Path::symlink_metadata", reason = "use file_access (automation roots)" },
+    { path = "std::path::Path::read_dir", reason = "use file_access::read_dir (automation roots)" },
+    { path = "std::path::Path::canonicalize", reason = "use file_access (automation roots)" },
+    { path = "figcraft_format::write_file_atomic", reason = "use file_access::write (automation roots)" },
+    { path = "figcraft_format::save_file", reason = "use file_access::write (automation roots)" },
+    { path = "figcraft_format::load_file", reason = "use file_access::read (automation roots)" },
+]

crates/engine/src/a11y_keys_tests.rs

@@ -55,3 +55,51 @@ fn reduce_motion_is_a_preference_that_persists() {
     let old: crate::Prefs = serde_json::from_value(json!({"theme": "dark"})).unwrap();
     assert!(!old.reduce_motion);
 }
+
+#[test]
+fn interface_size_is_relative_to_the_system_and_persists() {
+    let mut s = Session::new();
+    assert_eq!(s.prefs.ui_scale, 1.0, "the system's own size by default");
+    assert_eq!(s.execute("pref.uiScale", &json!({})).unwrap()["scale"], 1.0);
+    assert_eq!(s.execute("pref.uiScale", &json!({"scale": 1.25})).unwrap()["scale"], 1.25);
+    assert_eq!(s.prefs.ui_scale, 1.25);
+    // Reading changes nothing; "auto" (older scripts) is the system's own size.
+    assert_eq!(s.execute("pref.uiScale", &json!({})).unwrap()["scale"], 1.25);
+    assert_eq!(s.execute("pref.uiScale", &json!({"scale": "Auto"})).unwrap()["scale"], 1.0);
+    // Nothing to undo: the document didn't change.
+    assert!(!s.ds().map(|d| d.is_dirty()).unwrap_or(false));
+    // Saved with the other preferences and read back.
+    s.prefs.ui_scale = 0.9;
+    let v = serde_json::to_value(&s.prefs).unwrap();
+    assert_eq!(v["ui_scale"], 0.9);
+    let back: crate::Prefs = serde_json::from_value(v).unwrap();
+    assert_eq!(back.ui_scale, 0.9);
+}
+
+#[test]
+fn interface_size_stops_at_the_ends_and_junk_never_changes_it() {
+    let mut s = Session::new();
+    assert_eq!(s.execute("pref.uiScale", &json!({"scale": 0.01})).unwrap()["scale"], crate::UI_SCALE_MIN);
+    assert_eq!(s.execute("pref.uiScale", &json!({"scale": -4})).unwrap()["scale"], crate::UI_SCALE_MIN);
+    assert_eq!(s.execute("pref.uiScale", &json!({"scale": 1e308})).unwrap()["scale"], crate::UI_SCALE_MAX);
+    // The size is a factor (1.25), not a percentage: 125 is far past the end and stops there.
+    assert_eq!(s.execute("pref.uiScale", &json!({"scale": 125})).unwrap()["scale"], crate::UI_SCALE_MAX);
+    s.prefs.ui_scale = 1.5;
+    for junk in [json!({"scale": "NaN"}), json!({"scale": "big"}), json!({"scale": [1]}), json!({"scale": {"x": 1}})] {
+        assert!(s.execute("pref.uiScale", &junk).is_err(), "{junk}");
+        assert_eq!(s.prefs.ui_scale, 1.5, "{junk}");
+    }
+}
+
+#[test]
+fn a_settings_file_without_or_with_a_wrong_interface_size_reads_as_the_systems_size_and_keeps_the_rest() {
+    let old: crate::Prefs = serde_json::from_value(json!({"theme": "dark"})).unwrap();
+    assert_eq!(old.ui_scale, 1.0);
+    for bad in [json!("big"), json!(null), json!([2]), json!(true)] {
+        let p: crate::Prefs = serde_json::from_value(json!({"theme": "dark", "ui_scale": bad})).unwrap();
+        assert_eq!((p.ui_scale, p.theme.as_str()), (1.0, "dark"), "{bad}");
+    }
+    // A number out of range is clamped rather than refused.
+    let p: crate::Prefs = serde_json::from_value(json!({"ui_scale": 99, "theme": "dark"})).unwrap();
+    assert_eq!((p.ui_scale, p.theme.as_str()), (crate::UI_SCALE_MAX, "dark"));
+}

crates/engine/src/al_behaviour_tests.rs

@@ -180,6 +180,23 @@ fn vertical_wrap_columns_take_arrows_and_drops() {
     assert_eq!(line, Some([30.0, 48.0, 50.0, 48.0]));
 }
 
+#[test]
+fn adding_auto_layout_to_a_frame_keeps_its_size() {
+    // An existing frame with content hugs it (padding inferred, so the size is preserved);
+    // an empty one keeps its size instead of collapsing to its padding.
+    let mut s = Session::new();
+    let f = id(s.execute("frame.create", &json!({"x": 0, "y": 0, "width": 300, "height": 200})).unwrap());
+    rect(&mut s, f, 40.0, 20.0, "#FF0000");
+    s.execute("layout.add", &json!({"ids": [f]})).unwrap();
+    assert_eq!(sizing(&s, f), (Sizing::Hug, Sizing::Hug));
+    assert_eq!(size(&s, f), (300.0, 200.0));
+    // An empty frame keeps its size too.
+    let e = id(s.execute("frame.create", &json!({"x": 0, "y": 0, "width": 300, "height": 200})).unwrap());
+    s.execute("layout.add", &json!({"ids": [e]})).unwrap();
+    assert_eq!(sizing(&s, e), (Sizing::Fixed, Sizing::Fixed));
+    assert_eq!(size(&s, e), (300.0, 200.0));
+}
+
 #[test]
 fn canvas_stacking_paints_and_exports_the_first_child_on_top() {
     // Documented: the last child is on top by default; "first on top" flips which one is drawn

crates/engine/src/binding_lists_tests.rs

@@ -46,7 +46,7 @@ fn a_bound_fill_colour_keeps_the_other_fills() {
     let fills = s.doc().unwrap().node(r).unwrap().fills.clone();
     assert_eq!(fills.len(), 2, "the second fill stays");
     assert_eq!(fills[0].kind, PaintKind::Solid { color: Color::from_rgb8_const(0xFF, 0, 0) });
-    assert_eq!(fills[0].opacity, 0.5, "the bound paint keeps its opacity");
+    assert_eq!(fills[0].opacity, 1.0, "the variable brings the whole colour, alpha included");
     assert_eq!(fills[1].kind, PaintKind::Solid { color: Color::from_rgb8_const(0, 0xFF, 0) });
     // Removing the bound (first) fill takes the binding with it.
     ex(&mut s, "fill.remove", json!({"ids": [r], "index": 0}));
@@ -97,3 +97,77 @@ fn effect_moves_and_removals_reject_junk() {
     ex(&mut s, "effect.remove", json!({"ids": [r], "index": 7}));
     assert_eq!(s.doc().unwrap().node(r).unwrap().effects.len(), 1);
 }
+
+fn fill_hex(s: &Session, r: NodeId) -> Vec<String> {
+    s.doc().unwrap().node(r).unwrap().fills.iter().filter_map(|p| p.solid_color()).map(|c| c.to_hex()).collect()
+}
+
+fn brand_id(s: &Session) -> String {
+    s.doc().unwrap().variables.get("brand").unwrap().id.clone()
+}
+
+#[test]
+fn explicit_paint_edits_detach_the_colour_binding() {
+    // An edit that reported success keeps its colour: the binding it overwrote lets go (as
+    // selection colours already do), instead of putting the variable's colour back.
+    let edits = [
+        ("fill.set", json!({"color": "#00FF00"})),
+        ("node.set", json!({"props": {"fill": "#00FF00"}})),
+        ("node.set", json!({"props": {"fills": ["#00FF00"]}})),
+    ];
+    for (cmd, mut p) in edits {
+        let (mut s, r) = setup();
+        ex(&mut s, "variable.bind", json!({"ids": [r], "field": "fill", "variable": "brand"}));
+        p["ids"] = json!([r]);
+        ex(&mut s, cmd, p.clone());
+        assert_eq!(fill_hex(&s, r), ["00FF00"], "{cmd} {p}");
+        assert!(bound(&s, r).is_empty(), "{cmd} {p}");
+        ex(&mut s, "variable.set", json!({"variable": "brand", "value": "#123456"}));
+        assert_eq!(fill_hex(&s, r), ["00FF00"], "{cmd} {p}: no longer follows the variable");
+    }
+    for (cmd, mut p) in [("stroke.set", json!({"color": "#00FF00"})), ("node.set", json!({"props": {"stroke": "#00FF00"}}))] {
+        let (mut s, r) = setup();
+        ex(&mut s, "node.set", json!({"ids": [r], "props": {"strokes": ["#000000"]}}));
+        ex(&mut s, "variable.bind", json!({"ids": [r], "field": "stroke", "variable": "brand"}));
+        p["ids"] = json!([r]);
+        ex(&mut s, cmd, p);
+        let n = s.doc().unwrap().node(r).unwrap();
+        assert_eq!(n.strokes[0].solid_color().map(|c| c.to_hex()).as_deref(), Some("00FF00"), "{cmd}");
+        assert!(n.bound.is_empty(), "{cmd}");
+    }
+}
+
+#[test]
+fn clearing_bound_fills_adds_no_paint_back() {
+    let (mut s, r) = setup();
+    ex(&mut s, "variable.bind", json!({"ids": [r], "field": "fill", "variable": "brand"}));
+    ex(&mut s, "node.set", json!({"ids": [r], "props": {"fills": []}}));
+    assert!(s.doc().unwrap().node(r).unwrap().fills.is_empty());
+    assert!(bound(&s, r).is_empty());
+    ex(&mut s, "variable.set", json!({"variable": "brand", "value": "#123456"}));
+    assert!(s.doc().unwrap().node(r).unwrap().fills.is_empty(), "the variable doesn't bring the fill back");
+}
+
+#[test]
+fn paint_opacity_edits_keep_the_colour_binding() {
+    let (mut s, r) = setup();
+    ex(&mut s, "variable.bind", json!({"ids": [r], "field": "fill", "variable": "brand"}));
+    ex(&mut s, "fill.set", json!({"ids": [r], "opacity": 0.5}));
+    ex(&mut s, "variable.set", json!({"variable": "brand", "value": "#0000FF"}));
+    assert_eq!(fill_hex(&s, r), ["0000FF"], "the colour still follows the variable");
+    assert_eq!(s.doc().unwrap().node(r).unwrap().fills[0].opacity, 0.5);
+    // The same colour with another opacity, through node.set, keeps it too.
+    ex(&mut s, "node.set", json!({"ids": [r], "props": {"fills": [{"type": "solid", "color": "#0000FF", "opacity": 0.25}]}}));
+    assert_eq!(bound(&s, r).len(), 1);
+    assert_eq!(s.doc().unwrap().node(r).unwrap().fills[0].opacity, 0.25);
+}
+
+#[test]
+fn paints_set_with_their_binding_in_the_same_call_keep_it() {
+    let (mut s, r) = setup();
+    ex(&mut s, "variable.bind", json!({"ids": [r], "field": "fill", "variable": "brand"}));
+    let brand = brand_id(&s);
+    ex(&mut s, "node.set", json!({"ids": [r], "props": {"fills": ["#00FF00"], "boundVariables": {"fill": brand}}}));
+    assert_eq!(bound(&s, r), [("fill".to_string(), brand)]);
+    assert_eq!(fill_hex(&s, r), ["FF0000"], "the binding given with the paints applies");
+}

crates/engine/src/booleans.rs

@@ -124,7 +124,7 @@ pub(crate) fn apply(s: &mut Session, cmd: &str, p: &Value, op: BoolOp) -> Result
         }
         return Ok(json!({"ids": ids, "operation": op}));
     }
-    let out = crate::cmd::structure::wrap_boolean(s, p, op)?;
+    let out = crate::cmd::structure::wrap_boolean(s, p, cmd, op)?;
     // Operands of a new group follow its operation.
     if let Some(g) = crate::params::id_of(&out["id"]) {
         let doc = s.doc_mut()?;

crates/engine/src/bound_alpha_tests.rs

@@ -0,0 +1,131 @@
+//! A colour variable's alpha applies once to the paint it is bound to (#802): a `#RRGGBBAA` fill keeps
+//! its alpha in the paint opacity, and binding a variable with alpha hands the variable the whole
+//! colour, so the two alphas don't multiply (canvas, SVG, `.fig` round trips, mode switches).
+
+use figcraft_doc::NodeId;
+use serde_json::json;
+
+use crate::Session;
+
+/// 0x80 / 255 and 0x40 / 255.
+const HALF: f32 = 128.0 / 255.0;
+const QUARTER: f32 = 64.0 / 255.0;
+
+fn ex(s: &mut Session, cmd: &str, p: serde_json::Value) {
+    s.execute(cmd, &p).unwrap_or_else(|e| panic!("{cmd}: {e}"));
+}
+
+/// A rectangle filled `#0D6EFD80` and a colour variable `tint` (Light `light`, Dark `dark`).
+fn setup(light: &str, dark: &str) -> (Session, NodeId) {
+    let mut s = Session::new();
+    let r = s.execute("shape.rectangle", &json!({"x": 0, "y": 0, "width": 10, "height": 10, "props": {"fill": "#0D6EFD80"}})).unwrap();
+    let r = NodeId(r["id"].as_u64().unwrap());
+    ex(&mut s, "variable.createCollection", json!({"name": "Tokens", "modes": ["Light", "Dark"]}));
+    ex(&mut s, "variable.create", json!({"collection": "Tokens", "name": "tint", "type": "color", "value": light}));
+    ex(&mut s, "variable.set", json!({"variable": "tint", "mode": "Dark", "value": dark}));
+    (s, r)
+}
+
+/// The fill's effective alpha (colour alpha times paint opacity).
+fn alpha(s: &Session, r: NodeId) -> f32 {
+    s.doc().unwrap().node(r).unwrap().fills[0].solid_color().unwrap().a
+}
+
+/// The alpha byte of the rectangle rendered on its own (transparent backdrop).
+fn pixel_alpha(s: &Session, r: NodeId) -> u8 {
+    let pix = figcraft_render::render_node(s.doc().unwrap(), r, 1.0).unwrap();
+    let i = ((5 * pix.width() + 5) * 4 + 3) as usize;
+    pix.data()[i]
+}
+
+fn near(a: f32, b: f32) -> bool {
+    (a - b).abs() < 2e-3
+}
+
+#[test]
+fn a_hex_with_alpha_keeps_its_alpha_in_the_opacity() {
+    let (s, r) = setup("#0D6EFD80", "#0D6EFD40");
+    let p = &s.doc().unwrap().node(r).unwrap().fills[0];
+    assert_eq!(p.kind, figcraft_color::PaintKind::Solid { color: figcraft_color::Color::from_rgb8_const(0x0D, 0x6E, 0xFD) });
+    assert!(near(p.opacity, HALF));
+    assert_eq!(pixel_alpha(&s, r), 128);
+}
+
+#[test]
+fn a_bound_variable_alpha_applies_once() {
+    // The fill and the variable are both #0D6EFD80: the result is 50%, not 25%.
+    let (mut s, r) = setup("#0D6EFD80", "#0D6EFD40");
+    ex(&mut s, "variable.bind", json!({"ids": [r.0], "field": "fill", "variable": "tint"}));
+    assert!(near(alpha(&s, r), HALF), "{}", alpha(&s, r));
+    assert_eq!(pixel_alpha(&s, r), 128);
+    let svg = figcraft_svg::export_svg(s.doc().unwrap(), &[r], &figcraft_svg::SvgOptions::default()).unwrap();
+    assert!(svg.contains("fill=\"#0D6EFD\" fill-opacity=\"0.502\""), "{svg}");
+    // Binding the same variable again changes nothing.
+    ex(&mut s, "variable.bind", json!({"ids": [r.0], "field": "fill", "variable": "tint"}));
+    assert!(near(alpha(&s, r), HALF));
+}
+
+#[test]
+fn unbinding_keeps_the_colour_with_its_alpha_in_the_opacity() {
+    let (mut s, r) = setup("#0D6EFD40", "#0D6EFD");
+    ex(&mut s, "variable.bind", json!({"ids": [r.0], "field": "fill", "variable": "tint"}));
+    assert_eq!(pixel_alpha(&s, r), 64);
+    ex(&mut s, "variable.bind", json!({"ids": [r.0], "field": "fill", "variable": null}));
+    let p = &s.doc().unwrap().node(r).unwrap().fills[0];
+    assert_eq!(p.kind, figcraft_color::PaintKind::Solid { color: figcraft_color::Color::from_rgb8_const(0x0D, 0x6E, 0xFD) });
+    assert!(near(p.opacity, QUARTER), "{}", p.opacity);
+    assert_eq!(pixel_alpha(&s, r), 64);
+    // Undo restores the binding and its paint.
+    ex(&mut s, "edit.undo", json!({}));
+    assert!(!s.doc().unwrap().node(r).unwrap().bound.is_empty());
+    assert_eq!(pixel_alpha(&s, r), 64);
+}
+
+#[test]
+fn modes_switch_the_alpha_without_accumulating() {
+    let (mut s, r) = setup("#0D6EFD40", "#0D6EFD80");
+    ex(&mut s, "variable.bind", json!({"ids": [r.0], "field": "fill", "variable": "tint"}));
+    for (mode, want) in [("Dark", HALF), ("Light", QUARTER), ("Dark", HALF), ("Light", QUARTER)] {
+        ex(&mut s, "variable.setMode", json!({"collection": "Tokens", "mode": mode}));
+        assert!(near(alpha(&s, r), want), "{mode}: {}", alpha(&s, r));
+    }
+    // An opacity set while bound multiplies on top and survives mode switches.
+    ex(&mut s, "fill.set", json!({"ids": [r.0], "index": 0, "opacity": 0.5}));
+    ex(&mut s, "variable.setMode", json!({"collection": "Tokens", "mode": "Dark"}));
+    assert!(near(alpha(&s, r), HALF * 0.5));
+}
+
+#[test]
+fn node_set_and_style_bindings_apply_the_alpha_once() {
+    let (mut s, r) = setup("#0D6EFD80", "#0D6EFD40");
+    let var = s.doc().unwrap().variables.get("tint").unwrap().id.clone();
+    ex(&mut s, "node.set", json!({"id": r.0, "props": {"boundVariables": {"fill": var}}}));
+    assert!(near(alpha(&s, r), HALF));
+    ex(&mut s, "node.set", json!({"id": r.0, "props": {"boundVariables": {"fill": null}}}));
+    assert!(near(s.doc().unwrap().node(r).unwrap().fills[0].opacity, HALF));
+    // A paint style made from a `#RRGGBBAA` colour, bound to the variable.
+    let st = s.execute("style.create", &json!({"type": "paint", "name": "Tint", "value": "#0D6EFD80"})).unwrap()["id"].clone();
+    ex(&mut s, "style.bind", json!({"style": st, "field": "fills/0/color", "variable": "tint"}));
+    ex(&mut s, "style.apply", json!({"ids": [r.0], "style": st}));
+    assert!(near(alpha(&s, r), HALF), "{}", alpha(&s, r));
+}
+
+#[test]
+fn a_fig_round_trip_keeps_the_alpha_once() {
+    let (mut s, r) = setup("#0D6EFD80", "#0D6EFD40");
+    ex(&mut s, "variable.bind", json!({"ids": [r.0], "field": "fill", "variable": "tint"}));
+    ex(&mut s, "fill.set", json!({"ids": [r.0], "index": 0, "opacity": 0.5}));
+    let (bytes, _) = figcraft_format::fig::export(s.doc().unwrap(), None).unwrap();
+    let back = crate::cmd::file::load_fig(&bytes, "x").unwrap().unwrap().doc;
+    let n = back.nodes().find(|n| !n.bound.is_empty()).unwrap();
+    let a = n.fills[0].solid_color().unwrap().a;
+    assert!(near(a, HALF * 0.5), "{a}");
+}
+
+#[test]
+fn code_gives_a_translucent_stroke_its_alpha_once() {
+    let (mut s, r) = setup("#0D6EFD80", "#0D6EFD40");
+    ex(&mut s, "stroke.add", json!({"ids": [r.0], "color": "#FF000080"}));
+    let code = s.execute("inspect.code", &json!({"id": r.0})).unwrap()["code"].as_str().unwrap_or_default().to_string();
+    assert!(code.contains("solid rgba(255, 0, 0, 0.50)"), "{code}");
+}

crates/engine/src/catalog.rs

@@ -213,6 +213,8 @@ pub static MENU: &[MenuItem] = &[
     m!("Text/Case", "Uppercase", "text.caseUpper"),
     m!("Text/Case", "Lowercase", "text.caseLower"),
     m!("Text/Case", "Title case", "text.caseTitle"),
+    m!("Text", SEP, ""),
+    m!("Text", "Missing fonts…", "text.missingFonts"),
     // Arrange
     m!("Arrange", "Align left", "align.left"),
     m!("Arrange", "Align horizontal centers", "align.hcenter"),
@@ -287,7 +289,7 @@ pub fn items() -> impl Iterator<Item = &'static MenuItem> {
 }
 
 /// Items of FigCraft's own that the parity count leaves out (as it does the `collab.` ones).
-const OWN: [&str; 2] = ["file.newFromTemplate", "help.gettingStarted"];
+const OWN: [&str; 3] = ["file.newFromTemplate", "help.gettingStarted", "text.missingFonts"];
 
 /// Coverage: (implemented, total, missing ids). `extra` lists ids implemented by the UI layer.
 pub fn parity(extra: &[&str]) -> (usize, usize, Vec<&'static str>) {

crates/engine/src/cmd/arrange.rs

@@ -19,7 +19,21 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!("align.bottom", "Align bottom", "{ids?}", true, |s, p| align(s, p, Al::Bottom)),
         spec!("distribute.horizontal", "Distribute horizontal spacing", "{ids?, spacing?}", true, |s, p| distribute(s, p, true)),
         spec!("distribute.vertical", "Distribute vertical spacing", "{ids?, spacing?}", true, |s, p| distribute(s, p, false)),
+        spec!(
+            "arrange.spacing",
+            "Spacing",
+            "{ids?, horizontal?, vertical?, fromGesture?} (page units; fromGesture uses the interaction snapshot)",
+            true,
+            spacing
+        ),
         spec!("arrange.tidy", "Tidy up", "{ids?, spacing?}", true, tidy),
+        spec!(
+            "arrange.reorder",
+            "Reorder selection",
+            "{ids?, source, target, swap?, fromGesture?} (insert at target's visual slot; no hierarchy changes)",
+            true,
+            reorder
+        ),
         spec!("arrange.packH", "Pack horizontal", "{ids?}", true, |s, p| pack(s, p, true)),
         spec!("arrange.packV", "Pack vertical", "{ids?}", true, |s, p| pack(s, p, false)),
         spec!("arrange.roundToPixels", "Round to pixels", "{ids?}", true, round_px),
@@ -521,6 +535,7 @@ pub(crate) fn resize_cmd(s: &mut Session, p: &Value) -> Result<Value> {
     let (col, row) = string(p, "anchor").and_then(|a| crate::tools::anchor_of(&a)).unwrap_or((0, 0));
     let (ax, ay) = (f64::from(col) / 2.0, f64::from(row) / 2.0);
     let doc = s.doc_mut()?;
+    let before = super::styles::bound_before(doc, &ids);
     for i in ids {
         let n = doc.get(i)?;
         let (ow, oh) = (n.width, n.height);
@@ -544,5 +559,98 @@ pub(crate) fn resize_cmd(s: &mut Session, p: &Value) -> Result<Value> {
         }
         super::props::restore_worlds(doc, &kept)?;
     }
+    super::styles::detach_edited(doc, &before);
+    ok()
+}
+
+/// Reorder visual slots without rebuilding or reparenting layers.
+fn reorder(s: &mut Session, p: &Value) -> Result<Value> {
+    let cmd = "arrange.reorder";
+    let ids = req_targets(cmd, s, p)?;
+    let source = req_id(cmd, p, "source")?;
+    let target = req_id(cmd, p, "target")?;
+    let ds = s.ds()?;
+    let base = ds.interaction.as_ref().filter(|_| boolean(p, "fromGesture") == Some(true)).map(|i| i.doc.clone()).unwrap_or_else(|| ds.doc.clone());
+    let layout =
+        crate::selection_reorder::ReorderLayout::new(&base, &ids).ok_or_else(|| bad(cmd, "select a regular row, column or complete aligned grid"))?;
+    let positions = layout
+        .positions(source, target, boolean(p, "swap") == Some(true))
+        .ok_or_else(|| bad(cmd, "source and target must belong to the selection"))?;
+    // Validate every delta before editing; absolute targets always come from the gesture's
+    // snapshot so crossing several slots and returning to the start does not accumulate edits.
+    let doc = s.doc()?;
+    let mut moves = Vec::new();
+    for (id, at) in positions {
+        let now = doc.world_bounds(id).ok_or_else(|| bad(cmd, "layer is no longer available"))?;
+        let (dx, dy) = (at.x - now.x0, at.y - now.y0);
+        if !dx.is_finite() || !dy.is_finite() {
+            return Err(bad(cmd, "non-finite reorder result"));
+        }
+        if dx.abs() > 1e-9 || dy.abs() > 1e-9 {
+            let node = doc.get(id)?;
+            let parent = node.parent.map(|p| doc.world_transform(p)).unwrap_or(Affine::IDENTITY);
+            let transform = parent.inverse() * Affine::translate((dx, dy)) * parent * node.transform;
+            if !transform.as_coeffs().iter().all(|v| v.is_finite()) {
+                return Err(bad(cmd, "non-finite local transform"));
+            }
+            moves.push((id, dx, dy));
+        }
+    }
+    if !moves.is_empty() {
+        let doc = s.doc_mut()?;
+        for (id, dx, dy) in moves {
+            move_world(doc, id, dx, dy)?;
+        }
+    }
+    ok()
+}
+
+/// Set the distances between smart-selection tracks without rebuilding/reparenting the layers.
+fn spacing(s: &mut Session, p: &Value) -> Result<Value> {
+    let ids = req_targets("arrange.spacing", s, p)?;
+    // A scrub is absolute from the interaction snapshot, even if tracks overlap or cross.
+    let ds = s.ds()?;
+    let base = ds.interaction.as_ref().filter(|_| boolean(p, "fromGesture") == Some(true)).map(|i| i.doc.clone()).unwrap_or_else(|| ds.doc.clone());
+    let layout = crate::selection_spacing::selection_spacing(&base, &ids);
+    let mut offsets = std::collections::BTreeMap::<NodeId, (Option<f64>, Option<f64>)>::new();
+    let mut any = false;
+    for (key, axis, vertical) in [("horizontal", &layout.horizontal, false), ("vertical", &layout.vertical, true)] {
+        if get(p, key).is_none() {
+            continue;
+        }
+        let value = req_num("arrange.spacing", p, key)?;
+        if value.abs() > 1_000_000.0 {
+            return Err(bad("arrange.spacing", "spacing out of range"));
+        }
+        let axis = axis.as_ref().ok_or_else(|| bad("arrange.spacing", "selection has no spacing on this axis"))?;
+        any = true;
+        for (id, delta) in axis.offsets(value) {
+            if !delta.is_finite() {
+                return Err(bad("arrange.spacing", "non-finite spacing result"));
+            }
+            let pair = offsets.entry(id).or_default();
+            if vertical {
+                pair.1 = Some(delta);
+            } else {
+                pair.0 = Some(delta);
+            }
+        }
+    }
+    if !any {
+        return Err(bad("arrange.spacing", "pass horizontal or vertical spacing"));
+    }
+    let doc = s.doc_mut()?;
+    let mut moves = Vec::new();
+    for (id, (dx, dy)) in offsets {
+        let (Some(before), Some(now)) = (base.world_bounds(id), doc.world_bounds(id)) else { continue };
+        let (dx, dy) = (dx.map_or(0.0, |d| before.x0 + d - now.x0), dy.map_or(0.0, |d| before.y0 + d - now.y0));
+        if !dx.is_finite() || !dy.is_finite() {
+            return Err(bad("arrange.spacing", "non-finite spacing result"));
+        }
+        moves.push((id, dx, dy));
+    }
+    for (id, dx, dy) in moves {
+        move_world(doc, id, dx, dy)?;
+    }
     ok()
 }

crates/engine/src/cmd/component.rs

@@ -56,11 +56,17 @@ pub fn specs() -> Vec<CommandSpec> {
             s.set_selection(out.iter().filter_map(id_of).collect());
             Ok(json!({"ids": out}))
         }),
-        spec!("component.combineVariants", "Combine as variants", "{ids? (components)}", true, combine),
+        spec!(
+            "component.combineVariants",
+            "Combine as variants",
+            "{ids? (main components; none already a variant, a library copy or inside an instance)}  (wraps them in a new component set; names without `=` become \"Property 1=Default\", \"Property 1=VariantN\")",
+            true,
+            combine
+        ),
         spec!(
             "component.addVariant",
             "Add variant",
-            "{id? (component set or variant), property?, value?}  (duplicates the variant; `property`=`value` names the new one)",
+            "{id? (component set, variant, or a main component not in a set yet: it becomes a set of itself and the new variant), property?, value?}  (duplicates the variant; `property`=`value` names the new one)",
             true,
             add_variant
         ),
@@ -68,7 +74,7 @@ pub fn specs() -> Vec<CommandSpec> {
             let cmd = "instance.create";
             let c = req_id(cmd, p, "component")?;
             let page = s.page()?;
-            let parent = id(p, "parent").unwrap_or(page);
+            let parent = crate::params::opt_id(cmd, p, "parent")?.unwrap_or(page);
             let doc = s.doc_mut()?;
             let c = main_of(doc, c).ok_or_else(|| bad(cmd, "`component` must be a component or component set"))?;
             let (x, y) = match (num(p, "x"), num(p, "y")) {
@@ -330,23 +336,25 @@ fn create(s: &mut Session, p: &Value) -> Result<Value> {
     Ok(json!({"id": target}))
 }
 
+/// The name a new component set takes from its first variant: the path before the last '/'
+/// ("Button/State=Hover" → "Button"), or a plain name as is ("Button"). A bare "prop=value" name
+/// ("State=Default, Size=Small") names no set.
+fn set_name_from(variant: &str) -> Option<String> {
+    let base = variant.rsplit_once('/').map_or(variant, |(path, _)| path).trim();
+    (!base.is_empty() && !base.contains('=')).then(|| base.to_string())
+}
+
 /// Wrap components in a new component set (named after the first) placed around them.
-fn wrap_in_set(doc: &mut Document, ids: &[NodeId]) -> Result<NodeId> {
-    let cmd = "component.combineVariants";
+fn wrap_in_set(cmd: &str, doc: &mut Document, ids: &[NodeId]) -> Result<NodeId> {
     let top = *ids.last().ok_or_else(|| bad(cmd, "nothing selected"))?;
     let parent = doc.get(top)?.parent.ok_or_else(|| bad(cmd, "page"))?;
     if inside_instance(doc, top) || owning_instance(doc, parent).is_some() {
-        return Err(EngineError::Disabled(cmd.into(), "components inside an instance can't be combined".into()));
+        return Err(EngineError::Disabled(cmd.into(), INSIDE_INSTANCE.into()));
     }
     let bounds = doc.bounds_of(ids).unwrap_or_default();
     let pw = doc.world_transform(parent);
     let local = figcraft_geom::transform_rect_bbox(pw.inverse(), bounds.inflate(20.0, 20.0));
-    let base = ids
-        .first()
-        .and_then(|i| doc.node(*i))
-        .map(|n| n.name.split(['/', '=']).next().unwrap_or("Component").trim().to_string())
-        .filter(|n| !n.is_empty() && !n.contains(','))
-        .unwrap_or_else(|| "Component".into());
+    let base = ids.first().and_then(|i| doc.node(*i)).and_then(|n| set_name_from(&n.name)).unwrap_or_else(|| doc.next_name("Component"));
     let set = doc.alloc_id();
     let mut n = Node::new(set, NodeKind::ComponentSet { description: String::new() }, base, local.width(), local.height());
     n.transform = figcraft_geom::Affine::translate((local.x0, local.y0));
@@ -358,22 +366,71 @@ fn wrap_in_set(doc: &mut Document, ids: &[NodeId]) -> Result<NodeId> {
     Ok(set)
 }
 
-fn combine(s: &mut Session, p: &Value) -> Result<Value> {
-    let cmd = "component.combineVariants";
-    let ids = req_targets(cmd, s, p)?;
-    let doc = s.doc_mut()?;
+const INSIDE_INSTANCE: &str = "components inside an instance can't become variants";
+
+/// Why `ids` (distinct) can't become the variants of a new component set, or `None` when they
+/// can: anything but main components, components that are variants already (combining them would
+/// put a set in a set), library copies, components inside an instance, and a component inside
+/// another one of `ids`.
+fn combine_refusal(doc: &Document, ids: &[NodeId]) -> Option<&'static str> {
     if !ids.iter().all(|i| doc.node(*i).is_some_and(|n| matches!(n.kind, NodeKind::Component { .. }))) {
-        return Err(bad(cmd, "select components only"));
+        Some("select components only")
+    } else if ids.iter().any(|i| variant_set(doc, *i).is_some()) {
+        Some("components that are variants already can't be combined again")
+    } else if ids.iter().any(|i| doc.is_remote(*i)) {
+        Some(crate::library::READ_ONLY)
+    } else if ids.iter().any(|i| inside_instance(doc, *i)) {
+        Some(INSIDE_INSTANCE)
+    } else if roots(doc, ids).len() != ids.len() {
+        Some("a component can't be combined with one inside it")
+    } else {
+        None
     }
-    let ids = z_sorted(doc, &ids);
-    let set = wrap_in_set(doc, &ids)?;
+}
+
+/// Whether "Combine as variants" is on offer for `ids` (menus and the Design panel): two or more
+/// main components that [`combine_refusal`] lets through.
+pub fn can_combine_variants(doc: &Document, ids: &[NodeId]) -> bool {
+    ids.len() >= 2 && combine_refusal(doc, ids).is_none() && ids.iter().collect::<BTreeSet<_>>().len() == ids.len()
+}
+
+/// Whether "Add variant" is on offer for `id`: a component set with variants, a variant, or a main
+/// component not in a set yet (it becomes one); never a library copy or inside an instance.
+pub fn can_add_variant(doc: &Document, id: NodeId) -> bool {
+    let Some(n) = doc.node(id) else { return false };
+    let local = !doc.is_remote(id) && !inside_instance(doc, id);
+    match n.kind {
+        NodeKind::ComponentSet { .. } => {
+            local && n.children.iter().any(|c| doc.node(*c).is_some_and(|c| matches!(c.kind, NodeKind::Component { .. })))
+        }
+        NodeKind::Component { .. } => local,
+        _ => false,
+    }
+}
+
+/// Wrap `ids` (z-sorted main components) in a new component set, naming them "Property 1=Default",
+/// "Property 1=VariantN" unless already in prop=value form. Returns the set.
+fn make_variant_set(cmd: &str, doc: &mut Document, ids: &[NodeId]) -> Result<NodeId> {
+    let set = wrap_in_set(cmd, doc, ids)?;
     for (k, i) in ids.iter().enumerate() {
-        // Name variants "Property 1=Variant N" unless already in prop=value form.
         let node = doc.get_mut(*i)?;
         if !node.name.contains('=') {
             node.name = format!("Property 1={}", if k == 0 { "Default".to_string() } else { format!("Variant{}", k + 1) });
         }
     }
+    Ok(set)
+}
+
+fn combine(s: &mut Session, p: &Value) -> Result<Value> {
+    let cmd = "component.combineVariants";
+    let mut seen = BTreeSet::new();
+    let ids: Vec<NodeId> = req_targets(cmd, s, p)?.into_iter().filter(|i| seen.insert(*i)).collect();
+    let doc = s.doc_mut()?;
+    if let Some(why) = combine_refusal(doc, &ids) {
+        return Err(EngineError::Disabled(cmd.into(), why.into()));
+    }
+    let ids = z_sorted(doc, &ids);
+    let set = make_variant_set(cmd, doc, &ids)?;
     s.set_selection(vec![set]);
     Ok(json!({"id": set}))
 }
@@ -397,15 +454,19 @@ fn fit_set(doc: &mut Document, set: NodeId) {
 
 fn add_variant(s: &mut Session, p: &Value) -> Result<Value> {
     let cmd = "component.addVariant";
-    let t = targets(s, p).first().copied().ok_or_else(|| bad(cmd, "select a component set or variant"))?;
+    let t = targets(s, p).first().copied().ok_or_else(|| bad(cmd, "select a component set or component"))?;
     let doc = s.doc_mut()?;
     let (set, base) = match doc.get(t)?.kind {
         NodeKind::ComponentSet { .. } => {
             let last = doc.get(t)?.children.last().copied().ok_or_else(|| bad(cmd, "the component set is empty"))?;
             (t, last)
         }
-        NodeKind::Component { .. } => (variant_set(doc, t).ok_or_else(|| bad(cmd, "the component isn't a variant (combine as variants first)"))?, t),
-        _ => return Err(bad(cmd, "select a component set or variant")),
+        NodeKind::Component { .. } => match variant_set(doc, t) {
+            Some(set) => (set, t),
+            // A main component on its own becomes a set of itself, then gains the new variant.
+            None => (make_variant_set(cmd, doc, &[t])?, t),
+        },
+        _ => return Err(bad(cmd, "select a component set or component")),
     };
     let options = variant_options(doc, set);
     let mut pairs = variant_props(&doc.get(base)?.name);
@@ -472,6 +533,7 @@ fn detach(s: &mut Session, p: &Value) -> Result<Value> {
         // Own layers lose their link (slot content stays as it is); nested instances stay
         // instances of their own mains.
         let nested = unlink_layers(doc, i, Some(i));
+        keep_main_modes(doc, i)?;
         let n = doc.get_mut(i)?;
         n.kind = NodeKind::Frame;
         n.source = None;
@@ -491,6 +553,19 @@ fn detach(s: &mut Session, p: &Value) -> Result<Value> {
     Ok(json!({"ids": out}))
 }
 
+/// Make the variable modes instance `i` takes from its main its own (it's being detached).
+fn keep_main_modes(doc: &mut Document, i: NodeId) -> Result<()> {
+    let modes = match doc.get(i)?.kind {
+        NodeKind::Instance { component, .. } => doc.node(component).map(|m| m.var_modes.clone()).unwrap_or_default(),
+        _ => return Ok(()),
+    };
+    let own = &mut doc.get_mut(i)?.var_modes;
+    for (c, m) in modes {
+        own.entry(c).or_insert(m);
+    }
+    Ok(())
+}
+
 fn reset_instance(s: &mut Session, p: &Value) -> Result<Value> {
     let cmd = "component.resetInstance";
     let ids = req_targets(cmd, s, p)?;
@@ -608,7 +683,7 @@ fn make_slot(s: &mut Session, p: &Value) -> Result<Value> {
     let owner = Owner::resolve(doc, id).ok_or_else(|| bad(cmd, "the frame isn't inside a component"))?;
     let name = string(p, "name").unwrap_or_else(|| fresh_prop_name(doc, &owner, &n.name));
     let preferred = get(p, "preferred").cloned().unwrap_or(Value::Null);
-    add_prop(s, &json!({"id": id, "layer": id, "name": name, "type": "slot", "preferred": preferred}))
+    add_prop_for(cmd, s, &json!({"id": id, "layer": id, "name": name, "type": "slot", "preferred": preferred}))
 }
 
 fn remove_slot(s: &mut Session, p: &Value) -> Result<Value> {
@@ -678,8 +753,8 @@ fn push_changes(s: &mut Session, p: &Value) -> Result<Value> {
     if !doc.contains(component) {
         return Err(EngineError::Disabled(cmd.into(), "the main component was deleted (use component.restoreMain)".into()));
     }
-    // Copy every overridden layer's values to its source in the main (geometry, swaps, property
-    // values and slot content stay with the instance).
+    // Copy every overridden layer's values to its source in the main (geometry, resizing, swaps,
+    // property values and slot content stay with the instance).
     let mut pushed = 0;
     for d in doc.subtree(inst) {
         let Some(n) = doc.node(d).cloned() else { continue };
@@ -691,7 +766,7 @@ fn push_changes(s: &mut Session, p: &Value) -> Result<Value> {
         let groups: BTreeSet<String> = n
             .overrides
             .iter()
-            .filter(|g| !matches!(g.as_str(), "size" | "position" | "component" | "props" | SLOT) && !(d == inst && g.as_str() == "name"))
+            .filter(|g| !(matches!(g.as_str(), "size" | "resizing" | "position" | "component" | "props" | SLOT) || d == inst && g.as_str() == "name"))
             .cloned()
             .collect();
         for g in &groups {
@@ -1039,7 +1114,12 @@ fn valid_prop_name(cmd: &str, name: &str) -> Result<String> {
 }
 
 fn add_prop(s: &mut Session, p: &Value) -> Result<Value> {
-    let cmd = "component.addProperty";
+    add_prop_for("component.addProperty", s, p)
+}
+
+/// Add a component property for command `cmd`, which errors name (`component.makeSlot` adds its
+/// slot property here).
+fn add_prop_for(cmd: &str, s: &mut Session, p: &Value) -> Result<Value> {
     let target = targets(s, p).first().copied().ok_or_else(|| bad(cmd, "select a component"))?;
     let name = valid_prop_name(cmd, &req_string(cmd, p, "name")?)?;
     let t = req_string(cmd, p, "type")?;
@@ -1084,7 +1164,7 @@ fn add_prop(s: &mut Session, p: &Value) -> Result<Value> {
                 .unwrap_or_else(|| "Default".into());
             let set = match owner {
                 Owner::Set(s) => s,
-                Owner::Comp(c) => wrap_in_set(doc, &[c])?,
+                Owner::Comp(c) => wrap_in_set(cmd, doc, &[c])?,
             };
             for c in Owner::Set(set).components(doc) {
                 let cn = doc.get_mut(c)?;

crates/engine/src/cmd/create.rs

@@ -7,7 +7,7 @@ use serde_json::{Value, json};
 
 use super::{CommandSpec, ok};
 use crate::params::*;
-use crate::{EngineError, Result, Session, bad, spec};
+use crate::{Result, Session, bad, spec};
 
 /// Frame presets shown by the Frame tool (category, name, width, height).
 pub const FRAME_PRESETS: &[(&str, &str, f64, f64)] = &[
@@ -73,9 +73,13 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!("text.create", "Text", "{text, x, y, parent?, width? (fixed width wraps), props? (fontSize, fontFamily, …)}", true, |s, p| {
             create_kind(s, p, "text")
         }),
-        spec!("vector.create", "Vector", "{path (SVG path data) | points [[x,y],..], closed?, x?, y?, parent?, props?}", true, |s, p| create_kind(
-            s, p, "vector"
-        )),
+        spec!(
+            "vector.create",
+            "Vector",
+            "{path (SVG path data) | points [[x,y],..], closed?, x?, y?, width?, height? (scale the path; one keeps its proportion), parent?, props?}",
+            true,
+            |s, p| create_kind(s, p, "vector")
+        ),
         spec!(
             "image.place",
             "Place image",
@@ -162,12 +166,43 @@ pub fn parse_path_data(d: &str) -> Option<figcraft_geom::BezPath> {
     figcraft_geom::BezPath::from_svg(d).ok()
 }
 
+/// How much a vector's path is scaled to take the size asked for: with both sides, each scales
+/// independently (as resizing a vector does); with one, the other keeps its proportion. A size on
+/// an axis the geometry has none of is an error unless it is 0 (a line's height), and a size of 0
+/// or less on an axis it has is refused rather than flattening it.
+fn vector_scale(width: Option<f64>, height: Option<f64>, bw: f64, bh: f64, what: &str) -> std::result::Result<(f64, f64), String> {
+    let fit = |asked: Option<f64>, have: f64, axis: &str| match asked {
+        None => Ok(1.0),
+        Some(a) if have <= 1e-9 => {
+            if a == 0.0 {
+                Ok(1.0)
+            } else {
+                Err(format!("`{axis}` can't size {what} with no {} extent", if axis == "width" { "horizontal" } else { "vertical" }))
+            }
+        }
+        Some(a) if a > 0.0 && (a / have).is_finite() => Ok(a / have),
+        Some(_) => Err(format!("`{axis}` must be a positive, finite size: 0 or less would flatten {what}")),
+    };
+    Ok(match (width, height) {
+        (Some(_), Some(_)) => (fit(width, bw, "width")?, fit(height, bh, "height")?),
+        (Some(_), None) => {
+            let s = fit(width, bw, "width")?;
+            (s, s)
+        }
+        (None, Some(_)) => {
+            let s = fit(height, bh, "height")?;
+            (s, s)
+        }
+        (None, None) => (1.0, 1.0),
+    })
+}
+
 pub fn create(s: &mut Session, p: &Value) -> Result<Value> {
     let cmd = "node.create";
     let t = string(p, "type").ok_or_else(|| bad(cmd, "`type` is required"))?;
     let (mut kind, base) = kind_for(&t).ok_or_else(|| bad(cmd, format!("unknown type `{t}`")))?;
     let page = s.page()?;
-    let parent = id(p, "parent").unwrap_or(page);
+    let parent = crate::params::opt_id(cmd, p, "parent")?.unwrap_or(page);
     let doc = s.doc()?;
     let pn = doc.get(parent)?;
     if !pn.kind.is_container() {
@@ -187,20 +222,32 @@ pub fn create(s: &mut Session, p: &Value) -> Result<Value> {
         "Section" => (num_or(p, "width", 400.0), num_or(p, "height", 300.0)),
         _ => (num_or(p, "width", 100.0), num_or(p, "height", 100.0)),
     };
-    // Vectors: path data or points define the shape and its box.
+    // Vectors: path data or points define the shape and its box. `width`/`height`, when asked
+    // for, scale the geometry: both sides independently, one side proportionally.
     let mut offset = (0.0, 0.0);
+    let asked = (num(p, "width"), num(p, "height"));
     if let NodeKind::Vector { network } = &mut kind {
         if let Some(d) = string(p, "path") {
             let mut path = parse_path_data(&d).ok_or_else(|| bad(cmd, "`path` is not valid SVG path data"))?;
             use figcraft_geom::Shape;
             let bb = path.bounding_box();
+            if bb.width() <= 1e-9 && bb.height() <= 1e-9 {
+                return Err(bad(cmd, "`path` draws nothing: a vector needs a visible line or area"));
+            }
             path.apply_affine(figcraft_geom::Affine::translate((-bb.x0, -bb.y0)));
+            let (sx, sy) = vector_scale(asked.0, asked.1, bb.width(), bb.height(), "a path").map_err(|e| bad(cmd, e))?;
+            if sx != 1.0 || sy != 1.0 {
+                path.apply_affine(figcraft_geom::Affine::scale_non_uniform(sx, sy));
+            }
             *network = VectorNetwork::from_path(&path);
+            if network.segments.is_empty() {
+                return Err(bad(cmd, "`path` draws nothing: a vector needs a visible line or area"));
+            }
             if boolean(p, "closed") == Some(false) {
                 network.regions.clear();
             }
-            w = bb.width();
-            h = bb.height();
+            w = bb.width() * sx;
+            h = bb.height() * sy;
             offset = (bb.x0, bb.y0);
         } else if let Some(Value::Array(pts)) = get(p, "points") {
             let pts: Vec<Point> = pts.iter().filter_map(|v| Some(Point::new(f64_of(v.get(0)?)?, f64_of(v.get(1)?)?))).collect();
@@ -208,15 +255,19 @@ pub fn create(s: &mut Session, p: &Value) -> Result<Value> {
                 return Err(bad(cmd, "`points` needs at least two [x, y] pairs"));
             }
             let bb = figcraft_geom::points_bounds(pts.iter().copied()).unwrap_or_default();
-            let local: Vec<Point> = pts.iter().map(|q| Point::new(q.x - bb.x0, q.y - bb.y0)).collect();
+            if bb.width() <= 1e-9 && bb.height() <= 1e-9 {
+                return Err(bad(cmd, "`points` draws nothing: a vector needs a visible line or area"));
+            }
+            let (sx, sy) = vector_scale(asked.0, asked.1, bb.width(), bb.height(), "a point set").map_err(|e| bad(cmd, e))?;
+            let local: Vec<Point> = pts.iter().map(|q| Point::new((q.x - bb.x0) * sx, (q.y - bb.y0) * sy)).collect();
             *network = VectorNetwork::from_points(&local, boolean(p, "closed").unwrap_or(false));
-            w = bb.width();
-            h = bb.height();
+            w = bb.width() * sx;
+            h = bb.height() * sy;
             offset = (bb.x0, bb.y0);
         }
     }
     if let NodeKind::Text(td) = &mut kind {
-        td.characters = string(p, "text").or_else(|| string(p, "characters")).unwrap_or_default();
+        td.characters = super::props::normalize_line_endings(&string(p, "text").or_else(|| string(p, "characters")).unwrap_or_default());
         if w > 0.0 {
             td.auto_resize = TextAutoResize::Height;
         }
@@ -255,7 +306,7 @@ pub fn create(s: &mut Session, p: &Value) -> Result<Value> {
         node.width = tw;
         node.height = th;
     }
-    let index = num(p, "index").map(|i| i.max(0.0) as usize);
+    let index = crate::params::opt_index(cmd, p, "index")?;
     doc.insert(node, parent, index)?;
     if let Some(Value::Object(props)) = get(p, "props") {
         super::props::apply(cmd, doc, nid, props)?;
@@ -313,12 +364,12 @@ fn free_spot(s: &Session, w: f64, h: f64) -> Result<(f64, f64)> {
 
 #[cfg(not(target_arch = "wasm32"))]
 fn read_path(path: &str) -> Result<Vec<u8>> {
-    std::fs::read(path).map_err(|e| EngineError::Other(format!("{path}: {e}")))
+    crate::file_access::read(path)
 }
 
 #[cfg(target_arch = "wasm32")]
 fn read_path(path: &str) -> Result<Vec<u8>> {
-    Err(EngineError::Other(format!("{path}: files can't be read in the browser")))
+    Err(crate::EngineError::Other(format!("{path}: files can't be read in the browser")))
 }
 
 /// Place an image as a rectangle with an image fill (Figma's image layer).
@@ -340,7 +391,7 @@ pub fn place_image(s: &mut Session, p: &Value) -> Result<Value> {
         _ => ImageScaleMode::Fill,
     };
     let page = s.page()?;
-    let parent = id(p, "parent").unwrap_or(page);
+    let parent = crate::params::opt_id(cmd, p, "parent")?.unwrap_or(page);
     let ds = s.ds_mut()?;
     let doc = ds.doc_mut();
     let (hash, iw, ih) = figcraft_format::add_image(doc, bytes).map_err(|e| bad(cmd, e.to_string()))?;

crates/engine/src/cmd/edit.rs

@@ -18,13 +18,26 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "edit.duplicate",
             "Duplicate",
-            "{ids?, dx?, dy? (page offset; default: the offset of the last duplicate when ids are its copies, still selected; else top-level frames to the right with a 100 gap, everything else in place)}",
+            "{ids?, dx?, dy? (page offset; default: the offset of the last duplicate when ids are its copies, still selected; else top-level frames to the right with a 100 gap, everything else in place)}  a main component's copy is an instance of it (a variant stays a new variant in its set)",
             true,
             duplicate
         ),
         spec!("edit.copy", "Copy", "{ids?}", false, copy),
         spec!("edit.cut", "Cut", "{ids?}", true, cut),
-        spec!("edit.paste", "Paste", "{parent?, x?, y? (page coordinates of the pasted top-left)}", true, paste),
+        spec!(
+            "edit.paste",
+            "Paste",
+            "{parent?, x?, y? (page coordinates of the pasted top-left)}  a copied main component pastes as an instance of it within its file (cut ones, and pastes into other files, keep the component)",
+            true,
+            paste
+        ),
+        spec!(
+            "edit.pasteDesignLayers",
+            "Paste design layers",
+            "{html (the clipboard's HTML) | data (base64 of the clipboard's design data, at most 256 MB), parent?, x?, y?}  layers copied from another design app (a .fig canvas in the clipboard's HTML), read like a .fig file (best effort, with `warnings`), pasted as edit.paste pastes",
+            true,
+            paste_design_layers
+        ),
         spec!("edit.pasteOver", "Paste over selection", "{}", true, paste_over),
         spec!("edit.pasteReplace", "Paste to replace", "{ids?}", true, paste_replace),
         spec!("edit.copyProperties", "Copy properties", "{id?}", false, copy_props),
@@ -254,7 +267,7 @@ pub fn specs() -> Vec<CommandSpec> {
         }),
         spec!("effect.set", "Set effect", "{ids?, index, effect {..}}", true, |s, p| {
             let i = req_index("effect.set", p, "index")?;
-            let e: Effect = parse("effect.set", p, "effect")?.ok_or_else(|| bad("effect.set", "`effect` required"))?;
+            let e = super::props::effect_from("effect.set", p, "effect")?.ok_or_else(|| bad("effect.set", "`effect` required"))?;
             for id in req_targets("effect.set", s, p)? {
                 let n = s.doc_mut()?.get_mut(id)?;
                 if let Some(slot) = n.effects.get_mut(i) {
@@ -459,7 +472,7 @@ fn duplicate(s: &mut Session, p: &Value) -> Result<Value> {
         let top_frame = doc.node(parent).is_some_and(Node::is_page) && n.kind.is_frame_like();
         let idx = doc.index_in_parent(i).map(|x| x + 1);
         let w = n.width;
-        let nid = doc.duplicate_into(i, parent, idx)?;
+        let nid = crate::components::copy_in_file(doc, i, parent, idx)?;
         let (dx, dy) = match (num(p, "dx"), num(p, "dy")) {
             (Some(dx), dy) => (dx, dy.unwrap_or(0.0)),
             (None, Some(dy)) => (0.0, dy),
@@ -474,7 +487,8 @@ fn duplicate(s: &mut Session, p: &Value) -> Result<Value> {
                 nn.transform = Affine::translate((dx, dy)) * nn.transform;
             }
         }
-        if rename {
+        // An instance keeps the name instances get by default.
+        if rename && !matches!(doc.get(nid)?.kind, NodeKind::Instance { .. }) {
             let nn = doc.get_mut(nid)?;
             nn.name = bump_name(&nn.name);
         }
@@ -496,9 +510,34 @@ fn bump_name(n: &str) -> String {
 }
 
 /// The copied form of the selection.
-pub fn copy_to_clipboard(s: &mut Session, ids: &[NodeId]) -> Result<()> {
+pub fn copy_to_clipboard(s: &mut Session, cmd: &str, ids: &[NodeId]) -> Result<()> {
     let ds = s.ds()?;
-    let doc = &ds.doc;
+    // Pages are not layers: they can't be pasted anywhere.
+    let layers: Vec<NodeId> = ids.iter().copied().filter(|i| !ds.doc.node(*i).is_some_and(Node::is_page)).collect();
+    if layers.is_empty() && !ids.is_empty() {
+        return Err(EngineError::Disabled(cmd.into(), "pages can't be copied; use page.duplicate".into()));
+    }
+    let (nodes, images, bounds) = copied(&ds.doc, &layers);
+    let (source, source_path, uid) = (ds.doc.clone(), ds.path.clone(), ds.uid);
+    s.clipboard.source = Some(source);
+    s.clipboard.source_path = source_path;
+    s.clipboard.source_doc = uid;
+    s.clipboard.copied_components = nodes
+        .iter()
+        .filter(|(_, sub)| {
+            cmd == "edit.copy" && sub.first().is_some_and(|n| matches!(n.kind, NodeKind::Component { .. } | NodeKind::ComponentSet { .. }))
+        })
+        .map(|(root, _)| *root)
+        .collect();
+    s.clipboard.nodes = nodes;
+    s.clipboard.images = images;
+    s.clipboard.bounds = bounds;
+    Ok(())
+}
+
+type Copied = (Vec<(NodeId, Vec<Node>)>, BTreeMap<String, ImageData>, Option<figcraft_geom::Rect>);
+
+fn copied(doc: &Document, ids: &[NodeId]) -> Copied {
     let ids = z_sorted(doc, &roots(doc, ids));
     let mut nodes = Vec::new();
     let mut images = BTreeMap::new();
@@ -521,28 +560,74 @@ pub fn copy_to_clipboard(s: &mut Session, ids: &[NodeId]) -> Result<()> {
         nodes.push((*i, sub));
     }
     let bounds = doc.bounds_of(&ids);
-    let uid = ds.uid;
-    let source = Some(ds.doc.clone());
-    let source_path = ds.path.clone();
-    s.clipboard.source = source;
-    s.clipboard.source_path = source_path;
-    s.clipboard.nodes = nodes;
-    s.clipboard.images = images;
-    s.clipboard.bounds = bounds;
-    s.clipboard.source_doc = uid;
-    Ok(())
+    (nodes, images, bounds)
+}
+
+/// The markers around the copied layers in the clipboard's HTML, spelt as that format spells them.
+pub const CLIP_OPEN: &str = "(figma)";
+pub const CLIP_CLOSE: &str = "(/figma)";
+/// Largest design data read from the clipboard: the `.fig` import's own canvas cap (256 MB). Its
+/// base64 is checked first, so neither the text nor the decoded bytes can pass it.
+const MAX_CLIP_DATA: usize = 256 * 1024 * 1024;
+const MAX_CLIP_BASE64: usize = MAX_CLIP_DATA.div_ceil(3) * 4;
+
+/// Base64 `text` (whitespace ignored, padding optional) when it fits [`MAX_CLIP_DATA`].
+fn clip_base64(text: &str) -> Option<Vec<u8>> {
+    use base64::Engine as _;
+    if text.bytes().filter(|b| !b.is_ascii_whitespace()).count() > MAX_CLIP_BASE64 {
+        return None;
+    }
+    let b64: String = text.chars().filter(|c| !c.is_ascii_whitespace()).collect();
+    base64::engine::general_purpose::STANDARD.decode(&b64).or_else(|_| base64::engine::general_purpose::STANDARD_NO_PAD.decode(&b64)).ok()
+}
+
+/// Layers copied from another design app travel in the clipboard's HTML as a `.fig` canvas in
+/// base64 between [`CLIP_OPEN`] and [`CLIP_CLOSE`]. This gives those bytes, or `None` when the HTML
+/// holds no readable design data (it may just mention the marker).
+pub fn design_clipboard_buffer(html: &str) -> Option<Vec<u8>> {
+    let start = html.find(CLIP_OPEN)? + CLIP_OPEN.len();
+    let len = html.get(start..)?.find(CLIP_CLOSE)?;
+    let bytes = clip_base64(html.get(start..start + len)?)?;
+    figcraft_format::fig::is_fig(&bytes).then_some(bytes)
+}
+
+fn paste_design_layers(s: &mut Session, p: &Value) -> Result<Value> {
+    const CMD: &str = "edit.pasteDesignLayers";
+    let bytes = match (string(p, "html"), string(p, "data")) {
+        (Some(html), _) => design_clipboard_buffer(&html).ok_or_else(|| bad(CMD, "the HTML holds no copied design layers"))?,
+        (None, Some(d)) => clip_base64(&d).ok_or_else(|| bad(CMD, "`data` is not base64 of at most 256 MB"))?,
+        (None, None) => return Err(bad(CMD, "pass `html` or `data`")),
+    };
+    let other = super::file::load_fig(&bytes, "Pasted layers").ok_or_else(|| bad(CMD, "the data is not copied design layers"))??;
+    let doc = std::sync::Arc::new(other.doc);
+    let tops: Vec<NodeId> = doc.pages.iter().filter_map(|pg| doc.node(*pg)).flat_map(|pg| pg.children.iter().copied()).collect();
+    if tops.is_empty() {
+        return Err(EngineError::Disabled(CMD.into(), "the copied layers came in empty".into()));
+    }
+    let (nodes, images, bounds) = copied(&doc, &tops);
+    let props = s.clipboard.props.take();
+    // No open file has id 0. So paste treats this copy as a copy from a different file.
+    s.clipboard =
+        crate::Clipboard { nodes, images, props, bounds, source_doc: 0, source: Some(doc), source_path: None, copied_components: BTreeSet::new() };
+    let mut out = paste(s, p)?;
+    if !other.issues.is_empty() {
+        out["warnings"] = json!(other.issues);
+    }
+    Ok(out)
 }
 
 fn copy(s: &mut Session, p: &Value) -> Result<Value> {
     let ids = req_targets("edit.copy", s, p)?;
-    copy_to_clipboard(s, &ids)?;
+    copy_to_clipboard(s, "edit.copy", &ids)?;
     Ok(json!({"copied": s.clipboard.nodes.len()}))
 }
 
 fn cut(s: &mut Session, p: &Value) -> Result<Value> {
     let ids = req_targets("edit.cut", s, p)?;
-    copy_to_clipboard(s, &ids)?;
-    delete(s, &json!({"ids": ids}))
+    copy_to_clipboard(s, "edit.cut", &ids)?;
+    let doc = s.doc()?;
+    let layers: Vec<NodeId> = ids.into_iter().filter(|i| !doc.node(*i).is_some_and(Node::is_page)).collect();
+    delete(s, &json!({"ids": layers}))
 }
 
 /// Paste the clipboard under `parent` with the copied top-left moved to `at` (page coords).
@@ -553,6 +638,7 @@ pub fn paste_into(s: &mut Session, parent: NodeId, at: Option<(f64, f64)>) -> Re
     }
     // From another file: its instances follow the mains this file can have.
     let foreign = clip.source.as_ref().filter(|_| s.ds().is_ok_and(|d| d.uid != clip.source_doc));
+    let copy_local = s.ds()?.uid == clip.source_doc;
     let doc = s.doc_mut()?;
     for (k, v) in &clip.images {
         doc.images.entry(k.clone()).or_insert_with(|| v.clone());
@@ -566,6 +652,16 @@ pub fn paste_into(s: &mut Session, parent: NodeId, at: Option<(f64, f64)>) -> Re
     let mut out = Vec::new();
     let mut all = BTreeMap::new();
     for (root, nodes) in &clip.nodes {
+        if copy_local
+            && clip.copied_components.contains(root)
+            && let Some(n) = nodes.first().filter(|n| matches!(n.kind, NodeKind::Component { .. }))
+            && doc.node(*root).is_some_and(|n| matches!(n.kind, NodeKind::Component { .. }))
+        {
+            let instance = crate::components::create_instance(doc, *root, parent, 0.0, 0.0)?;
+            doc.get_mut(instance)?.transform = doc.world_transform(parent).inverse() * shift * n.transform;
+            out.push(instance);
+            continue;
+        }
         let mut map = BTreeMap::new();
         for n in nodes {
             map.insert(n.id, doc.alloc_id());
@@ -591,10 +687,12 @@ fn paste(s: &mut Session, p: &Value) -> Result<Value> {
     // else in the frame's centre; otherwise in place on the page (or the viewport centre).
     let sel = s.selection();
     let doc = s.doc()?;
+    let copy_local = s.ds()?.uid == s.clipboard.source_doc;
     let target = id(p, "parent").or_else(|| {
         sel.first()
             .copied()
             .filter(|i| sel.len() == 1 && doc.node(*i).is_some_and(|n| n.kind.is_frame_like() && !matches!(n.kind, NodeKind::Instance { .. })))
+            .filter(|i| !copy_local || !s.clipboard.copied_components.iter().any(|root| doc.is_ancestor(*root, *i)))
     });
     let parent = target.unwrap_or(page);
     let at = match (num(p, "x"), num(p, "y")) {
@@ -861,9 +959,13 @@ pub fn opacity_from_digits(digits: &str) -> Option<f32> {
 fn opacity_keys(s: &mut Session, p: &Value) -> Result<Value> {
     let digits = req_string("object.opacityKeys", p, "digits")?;
     let o = opacity_from_digits(&digits).ok_or_else(|| bad("object.opacityKeys", "`digits` must be one or two digits"))?;
-    for i in req_targets("object.opacityKeys", s, p)? {
-        s.doc_mut()?.get_mut(i)?.opacity = o;
+    let ids = req_targets("object.opacityKeys", s, p)?;
+    let doc = s.doc_mut()?;
+    let before = super::styles::bound_before(doc, &ids);
+    for i in ids {
+        doc.get_mut(i)?.opacity = o;
     }
+    super::styles::detach_edited(doc, &before);
     Ok(json!({"opacity": o}))
 }
 
@@ -1003,7 +1105,8 @@ fn find_replace(s: &mut Session, p: &Value) -> Result<Value> {
     if find.is_empty() {
         return Err(bad("edit.findReplace", "`find` is empty"));
     }
-    let replace = string(p, "replace");
+    // Line breaks stored as the editor stores them (CRLF, CR, U+2028 and U+2029 become LF).
+    let replace = string(p, "replace").map(|r| super::props::normalize_line_endings(&r));
     let names = boolean(p, "layerNames").unwrap_or(false);
     let page = s.page()?;
     let doc = s.doc_mut()?;
@@ -1085,10 +1188,37 @@ fn set(s: &mut Session, p: &Value) -> Result<Value> {
             .collect(),
         None => Vec::new(),
     };
-    let doc = s.doc_mut()?;
-    for i in ids {
-        super::props::apply("node.set", doc, i, &props)?;
+    let mut warnings = font_style_warnings(&s.ds()?.doc, &ids, &props);
+    // Auto layout keys go to the layers that can have auto layout; with none among the targets,
+    // the first refuses them (`props::layout_mut`).
+    let layout_keys: Vec<&str> = props.keys().map(String::as_str).filter(|k| super::props::LAYOUT_KEYS.contains(k)).collect();
+    let mut without_layout = props.clone();
+    let mut skipped = BTreeSet::new();
+    if !layout_keys.is_empty() {
+        let doc = &s.ds()?.doc;
+        let frame_like = |i: &NodeId| doc.node(*i).is_some_and(|n| n.kind.is_frame_like());
+        if ids.iter().any(frame_like) {
+            skipped = ids.iter().copied().filter(|i| !frame_like(i)).collect();
+            without_layout.retain(|k, _| !layout_keys.contains(&k.as_str()));
+        }
+        if !skipped.is_empty() {
+            let names: Vec<String> =
+                skipped.iter().take(10).filter_map(|i| doc.node(*i)).map(|n| format!("{} “{}” ({})", n.id, n.name, n.kind.type_name())).collect();
+            let more = if skipped.len() > names.len() { format!(" and {} more", skipped.len() - names.len()) } else { String::new() };
+            warnings.push(format!(
+                "{} skipped on {}{more}: only frames, components and instances have auto layout",
+                layout_keys.iter().map(|k| format!("`{k}`")).collect::<Vec<_>>().join(", "),
+                names.join(", ")
+            ));
+        }
     }
+    let doc = s.doc_mut()?;
+    let before = super::styles::bound_before(doc, &ids);
+    for i in ids {
+        let props = if skipped.contains(&i) { &without_layout } else { &props };
+        super::props::apply("node.set", doc, i, props)?;
+    }
+    super::styles::detach_edited(doc, &before);
     if let Some(o) = pivot {
         for (i, q) in pinned {
             let d = o - doc.world_transform(i) * q;
@@ -1097,7 +1227,43 @@ fn set(s: &mut Session, p: &Value) -> Result<Value> {
             }
         }
     }
-    ok()
+    if warnings.is_empty() { ok() } else { Ok(json!({"ok": true, "warnings": warnings})) }
+}
+
+/// A `fontStyle` draws in the family's face nearest to it, as a text layer resolves it. When that
+/// face has another weight or slant than the name asks for ("Black" on a family whose heaviest is
+/// Bold), say which face it is. Families that aren't installed, and names that match a style or a
+/// named instance (spelled any way: "SemiBold", "Semi Bold"), say nothing.
+fn font_style_warnings(doc: &figcraft_doc::Document, ids: &[NodeId], props: &serde_json::Map<String, Value>) -> Vec<String> {
+    let Some(style) = props.get("fontStyle").and_then(Value::as_str) else { return Vec::new() };
+    let mut families: Vec<String> = match props.get("fontFamily").and_then(Value::as_str) {
+        Some(f) => vec![f.to_string()],
+        None => ids
+            .iter()
+            .filter_map(|i| doc.node(*i))
+            .filter_map(|n| n.kind.text())
+            .flat_map(|t| t.spans().into_iter().map(|(_, _, st)| st.font_family.clone()).collect::<Vec<_>>())
+            .collect(),
+    };
+    families.sort();
+    families.dedup();
+    let norm = |s: &str| s.to_lowercase().replace([' ', '-', '_'], "");
+    let (want_w, want_i) = (i32::from(figcraft_doc::style_weight(style)), style.to_lowercase().contains("italic"));
+    families
+        .into_iter()
+        .filter_map(|family| {
+            let styles = figcraft_text::family_styles(&family);
+            if styles.is_empty() || styles.iter().any(|x| norm(x) == norm(style)) {
+                return None;
+            }
+            let face = figcraft_text::find_face(&family, style).filter(|f| f.family.eq_ignore_ascii_case(&family))?;
+            let w = face.axis("wght").map_or(i32::from(face.weight), |a| a.clamp(f64::from(want_w)).round() as i32);
+            if face.instance(style).is_some() || (w == want_w && face.italic == want_i) {
+                return None;
+            }
+            Some(format!("{family} has no `{style}` style: it draws in {}, the nearest (it has: {})", face.style, styles.join(", ")))
+        })
+        .collect()
 }
 
 /// `stroke.widthProfile`: a preset or points (through `node.set`'s `widthProfile`, so instances
@@ -1176,7 +1342,7 @@ fn paint_list(s: &mut Session, p: &Value, fills: bool, add: bool) -> Result<Valu
 fn paint_set(s: &mut Session, p: &Value, fills: bool) -> Result<Value> {
     let cmd = if fills { "fill.set" } else { "stroke.set" };
     let ids = req_targets(cmd, s, p)?;
-    let idx = num(p, "index").map(|x| x.max(0.0) as usize);
+    let idx = opt_index(cmd, p, "index")?;
     let new_paint = match get(p, "paint") {
         Some(v) => Some(paint_of(v).ok_or_else(|| bad(cmd, "invalid paint"))?),
         None => None,
@@ -1210,7 +1376,7 @@ fn paint_set(s: &mut Session, p: &Value, fills: bool) -> Result<Value> {
         if let Some(b) = blend(p, "blend") {
             slot.blend = b;
         }
-        super::lists::remap_stop_bindings(n, fills, at, &old);
+        super::lists::rebind_edited_paint(n, fills, at, &old);
         if fills {
             n.styles.fill = None;
         } else {
@@ -1224,7 +1390,7 @@ fn pattern_fill(s: &mut Session, p: &Value) -> Result<Value> {
     const CMD: &str = "fill.pattern";
     let src = req_id(CMD, p, "source")?;
     let doc = s.doc()?;
-    if !doc.node(src).is_some_and(|n| !n.is_page()) {
+    if doc.node(src).is_none_or(|n| n.is_page()) {
         return Err(bad(CMD, "`source` must be a layer"));
     }
     if req_targets(CMD, s, p)?.iter().any(|t| doc.is_ancestor(*t, src)) {
@@ -1244,8 +1410,8 @@ fn pattern_fill(s: &mut Session, p: &Value) -> Result<Value> {
 }
 
 fn effect_add(s: &mut Session, p: &Value) -> Result<Value> {
-    let e: Effect = match get(p, "effect") {
-        Some(v) => serde_json::from_value(v.clone()).map_err(|e| bad("effect.add", e.to_string()))?,
+    let e: Effect = match super::props::effect_from("effect.add", p, "effect")? {
+        Some(e) => e,
         None => {
             let ty = string(p, "type").unwrap_or_else(|| "dropShadow".into());
             Effect::of_type(&ty).ok_or_else(|| bad("effect.add", format!("unknown effect type `{ty}`")))?

crates/engine/src/cmd/file.rs

@@ -30,7 +30,7 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "file.open",
             "Open",
-            "{path, variables? (REST: the local variables JSON as an object, JSON text or a path; default `<name>.variables.json` or `variables.json` next to the file)} (.figcraft, .json: FigCraft or REST API file JSON, .fig (best effort), .svg, .png, .jpg …); REST and .fig imports return `warnings`",
+            "{path | data (base64) + name (tells the format; opens as a new unsaved document), variables? (REST: the local variables JSON as an object, JSON text or a path; default `<name>.variables.json` or `variables.json` next to the file)} (.figcraft, .json: FigCraft or REST API file JSON, .fig (best effort), .svg, .png, .jpg …); REST and .fig imports return `warnings`; a file opened anew returns `summary` {name, pages, layers, images} (one that was already open just returns its `index`)",
             false,
             open
         ),
@@ -41,8 +41,20 @@ pub fn specs() -> Vec<CommandSpec> {
             false,
             open_recent
         ),
-        spec!("file.save", "Save", "{path?} (programmatic saves need a path the first time)", false, save),
-        spec!("file.saveAs", "Save as", "{path}", false, save_as),
+        spec!(
+            "file.save",
+            "Save",
+            "{path?} (programmatic saves need a path the first time); a .fig path writes an experimental export copy of the shown document with `warnings`, keeping the native path, unsaved changes and version preview",
+            false,
+            save
+        ),
+        spec!(
+            "file.saveAs",
+            "Save as",
+            "{path} (no extension adds .figcraft); a .fig path writes an experimental export copy of the shown document with `warnings`, keeping the native path, unsaved changes and version preview",
+            false,
+            save_as
+        ),
         spec!(
             "file.export",
             "Export",
@@ -74,12 +86,26 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "file.import",
             "Import",
-            "{path | data (base64) + name, x?, y?, center? (SVG: centre it on x, y), variables? (REST: the local variables JSON as an object, JSON text or a path)}  SVG becomes an editable frame (shapes, text, gradients, masks, effects; with `warnings` for what it left out), images become image layers, .figcraft, REST API file JSON and .fig pages are appended with their variables and flows (REST and .fig: with `warnings`)",
+            "{path | data (base64) + name, x?, y?, center? (SVG: centre it on x, y), variables? (REST: the local variables JSON as an object, JSON text or a path)}  SVG becomes an editable frame (shapes, text, gradients, masks, effects; with `warnings` for what it left out), images become image layers, .figcraft, REST API file JSON and .fig pages are appended with their variables and flows (REST and .fig: with `warnings`; those return `summary` {name, pages, layers, images} of the file read)",
             true,
             import
         ),
         spec!("file.placeImage", "Place image", "{path | data, x?, y?}", true, super::create::place_image),
         spec!("file.close", "Close tab", "{index?, force? (discard unsaved changes)}", false, close),
+        spec!("file.moveTab", "Move tab", "{from, to} (indices among open documents)", false, |s, p| {
+            let from = req_index("file.moveTab", p, "from")?;
+            let to = req_index("file.moveTab", p, "to")?;
+            if from >= s.docs.len() || to >= s.docs.len() {
+                return Err(bad("file.moveTab", "no such document"));
+            }
+            if from != to {
+                let active_uid = s.docs.get(s.active).map(|d| d.uid);
+                let doc = s.docs.remove(from);
+                s.docs.insert(to, doc);
+                s.active = active_uid.and_then(|uid| s.docs.iter().position(|d| d.uid == uid)).unwrap_or(0);
+            }
+            Ok(json!({"index": to}))
+        }),
         spec!(
             "file.recover",
             "Recover file",
@@ -423,7 +449,7 @@ pub(crate) fn recovered(path: &str) -> Result<DocState> {
 
 #[cfg(not(target_arch = "wasm32"))]
 fn read(path: &str) -> Result<Vec<u8>> {
-    std::fs::read(path).map_err(|e| EngineError::Other(format!("{path}: {e}")))
+    crate::file_access::read(path)
 }
 
 #[cfg(target_arch = "wasm32")]
@@ -433,11 +459,7 @@ fn read(path: &str) -> Result<Vec<u8>> {
 
 /// The bytes of file `path`, refused when it's larger than `max`.
 pub(crate) fn read_capped(path: &str, max: u64) -> Result<Vec<u8>> {
-    let meta = std::fs::metadata(path).map_err(|e| EngineError::Other(format!("{path}: {e}")))?;
-    if !meta.is_file() || meta.len() > max {
-        return Err(EngineError::Other(format!("{path}: not a file of at most {max} bytes")));
-    }
-    read(path)
+    crate::file_access::read_capped(path, max)
 }
 
 /// Write `bytes` to `path` through a uniquely named, exclusively created staging file and one
@@ -445,7 +467,7 @@ pub(crate) fn read_capped(path: &str, max: u64) -> Result<Vec<u8>> {
 /// truncates `path`, and no file or symlink at a staging name is ever written through.
 #[cfg(not(target_arch = "wasm32"))]
 pub(crate) fn write(path: &str, bytes: &[u8]) -> Result<()> {
-    figcraft_format::write_file_atomic(std::path::Path::new(path), bytes).map_err(|e| EngineError::Other(format!("{path}: {e}")))
+    crate::file_access::write(path, bytes)
 }
 
 #[cfg(target_arch = "wasm32")]
@@ -461,6 +483,11 @@ fn file_stem(path: &str) -> String {
     std::path::Path::new(path).file_stem().and_then(|e| e.to_str()).unwrap_or("Untitled").to_string()
 }
 
+/// The counts the import report shows for a freshly loaded document.
+fn import_summary(doc: &Document) -> Value {
+    json!({"name": doc.name, "pages": doc.pages.len(), "layers": doc.nodes().filter(|n| !n.is_page()).count(), "images": doc.images.len()})
+}
+
 /// Load a document from any supported file (REST API file JSON images come from an `images`
 /// folder next to the file).
 pub fn load(path: &str) -> Result<(Document, Vec<String>)> {
@@ -506,10 +533,8 @@ fn load_with(
             Ok((doc.into(), false))
         }
         _ => {
-            if let Some(r) = figcraft_format::fig::try_import(bytes, &file_stem(name_hint)) {
-                let (mut doc, warnings) = r.map_err(|e| EngineError::Other(e.to_string()))?;
-                link_instances(&mut doc);
-                return Ok((figcraft_format::Loaded { issues: warnings, ..doc.into() }, true));
+            if let Some(r) = load_fig(bytes, &file_stem(name_hint)) {
+                return Ok((r?, true));
             }
             if let Some(r) = figcraft_format::rest::try_import_with(bytes, variables, images) {
                 let (mut doc, warnings) = r.map_err(|e| EngineError::Other(e.to_string()))?;
@@ -517,7 +542,8 @@ fn load_with(
                 return Ok((figcraft_format::Loaded { issues: warnings, ..doc.into() }, true));
             }
             let mut loaded = figcraft_format::load_bytes_with_versions(bytes).map_err(|e| EngineError::Other(e.to_string()))?;
-            if loaded.doc.name.is_empty() {
+            // Older files saved an untouched default title even after the user chose a filename.
+            if loaded.doc.name.is_empty() || loaded.doc.name == "Untitled" {
                 loaded.doc.name = file_stem(name_hint);
             }
             Ok((loaded, false))
@@ -525,10 +551,21 @@ fn load_with(
     }
 }
 
+/// Gives `None` when `bytes` are not a `.fig` file. Then other readers can try.
+pub(crate) fn load_fig(bytes: &[u8], name: &str) -> Option<Result<figcraft_format::Loaded>> {
+    let r = figcraft_format::fig::try_import(bytes, name)?;
+    Some(r.map_err(|e| EngineError::Other(e.to_string())).map(|(mut doc, warnings)| {
+        link_instances(&mut doc);
+        figcraft_format::Loaded { issues: warnings, ..doc.into() }
+    }))
+}
+
 /// Link imported instances to their mains (layer sources, overrides found by comparing values),
 /// innermost first so outer instances settle last.
 fn link_instances(doc: &mut Document) {
+    super::styles::unfold_imported_bound_alpha(doc);
     crate::style_vars::after_load(doc);
+    super::styles::apply_paint_bindings_on_load(doc);
     let mut insts: Vec<(usize, NodeId)> =
         doc.nodes().filter(|n| matches!(n.kind, NodeKind::Instance { .. })).map(|n| (doc.ancestors(n.id).len(), n.id)).collect();
     insts.sort_by_key(|a| std::cmp::Reverse(a.0));
@@ -552,11 +589,9 @@ fn rest_images(path: &str) -> impl Fn(&str) -> Option<Vec<u8>> {
             return None;
         }
         let dir = dir.as_ref()?;
-        ["", ".png", ".jpg", ".jpeg", ".gif", ".webp"].iter().find_map(|e| {
-            let p = dir.join(format!("{r}{e}"));
-            let meta = std::fs::metadata(&p).ok()?;
-            if meta.is_file() && meta.len() <= MAX_IMAGE_FILE { std::fs::read(&p).ok() } else { None }
-        })
+        ["", ".png", ".jpg", ".jpeg", ".gif", ".webp"]
+            .iter()
+            .find_map(|e| crate::file_access::read_capped(dir.join(format!("{r}{e}")), MAX_IMAGE_FILE).ok())
     }
 }
 
@@ -579,11 +614,7 @@ fn sibling_variables(path: &str) -> Option<Value> {
     let file = std::path::Path::new(path);
     let dir = file.parent()?;
     [format!("{}.variables.json", file_stem(path)), "variables.json".to_string()].iter().map(|n| dir.join(n)).filter(|c| c != file).find_map(|c| {
-        let meta = std::fs::metadata(&c).ok()?;
-        if !meta.is_file() || meta.len() > MAX_VARIABLES_FILE {
-            return None;
-        }
-        let v: Value = serde_json::from_slice(&std::fs::read(&c).ok()?).ok()?;
+        let v: Value = serde_json::from_slice(&crate::file_access::read_capped(c, MAX_VARIABLES_FILE).ok()?).ok()?;
         figcraft_format::rest::is_variables_json(&v).then_some(v)
     })
 }
@@ -621,20 +652,29 @@ fn remember(s: &mut Session, path: &str) {
 }
 
 fn open_recent(s: &mut Session, p: &Value) -> Result<Value> {
+    use crate::file_access::{Access, allow, allowed};
     const CMD: &str = "file.openRecent";
+    // Confined to automation roots, the recent files outside them are never listed, opened, removed
+    // or named: `index` counts the files listed.
+    let listed = |r: &String| allowed(r, Access::Read);
     if p.get("clear").and_then(Value::as_bool) == Some(true) {
-        s.prefs.recent_files.clear();
+        s.prefs.recent_files.retain(|r| !listed(r));
     }
     if let Some(gone) = string(p, "remove") {
-        s.prefs.recent_files.retain(|r| *r != gone);
+        s.prefs.recent_files.retain(|r| *r != gone || !listed(r));
     }
     let path = match (string(p, "path"), num(p, "index")) {
-        (Some(path), _) => Some(path),
-        (None, Some(i)) => Some(s.prefs.recent_files.get(i.max(0.0) as usize).cloned().ok_or_else(|| bad(CMD, "no such recent file"))?),
+        (Some(path), _) => {
+            allow(&path, Access::Read)?;
+            Some(path)
+        }
+        (None, Some(i)) => {
+            Some(s.prefs.recent_files.iter().filter(|r| listed(r)).nth(i.max(0.0) as usize).cloned().ok_or_else(|| bad(CMD, "no such recent file"))?)
+        }
         _ => None,
     };
     if let Some(path) = path {
-        if !std::path::Path::new(&path).exists() {
+        if !crate::file_access::exists(&path) {
             s.prefs.recent_files.retain(|r| *r != path);
             return Err(bad(CMD, format!("{path} no longer exists")));
         }
@@ -644,17 +684,23 @@ fn open_recent(s: &mut Session, p: &Value) -> Result<Value> {
         .prefs
         .recent_files
         .iter()
+        .filter(|r| listed(r))
         .map(|r| {
             let name = std::path::Path::new(r).file_name().map_or_else(|| r.clone(), |f| f.to_string_lossy().into_owned());
-            json!({"path": r, "name": name, "exists": std::path::Path::new(r).exists()})
+            json!({"path": r, "name": name, "exists": crate::file_access::exists(r)})
         })
         .collect();
     Ok(json!({"files": files}))
 }
 
 fn open(s: &mut Session, p: &Value) -> Result<Value> {
-    let path = req_string("file.open", p, "path")?;
     let variables = variables_param("file.open", p)?;
+    if string(p, "path").is_none()
+        && let Some(d) = string(p, "data")
+    {
+        return open_data(s, &d, p, variables.as_ref());
+    }
+    let path = req_string("file.open", p, "path")?;
     // Already open: switch to it.
     if let Some(i) = s.docs.iter().position(|d| d.path.as_deref() == Some(path.as_str())) {
         s.active = i;
@@ -672,9 +718,26 @@ fn open(s: &mut Session, p: &Value) -> Result<Value> {
             more => format!("{}: {} problems were repaired or left out while opening it, e.g. {}", file_stem(&path), more.len(), more[0]),
         });
     }
+    let summary = import_summary(&loaded.doc);
     s.docs.push(DocState::new(loaded.doc, native.then_some(path)).with_versions(loaded.versions).with_branches(loaded.branches));
     s.active = s.docs.len() - 1;
-    let mut out = json!({"index": s.active});
+    let mut out = json!({"index": s.active, "summary": summary});
+    out[if warnings { "warnings" } else { "repairs" }] = json!(loaded.issues);
+    Ok(out)
+}
+
+/// [`open`] for a file given as base64 `data` (a file dropped without a path on disk): `name` tells
+/// the format. It opens as a new document with no path, so the first save asks where to put it.
+fn open_data(s: &mut Session, data: &str, p: &Value, variables: Option<&Value>) -> Result<Value> {
+    let name = req_string("file.open", p, "name")?;
+    let data = data.split_once(',').map_or(data, |(_, b)| b);
+    let bytes = base64::engine::general_purpose::STANDARD.decode(data.trim()).map_err(|e| bad("file.open", e.to_string()))?;
+    let (loaded, rest) = load_with(&bytes, &name, variables, &figcraft_format::rest::no_images)?;
+    let warnings = rest || ext(&name) == "svg";
+    let summary = import_summary(&loaded.doc);
+    s.docs.push(DocState::new(loaded.doc, None).with_versions(loaded.versions).with_branches(loaded.branches));
+    s.active = s.docs.len() - 1;
+    let mut out = json!({"index": s.active, "summary": summary});
     out[if warnings { "warnings" } else { "repairs" }] = json!(loaded.issues);
     Ok(out)
 }
@@ -775,12 +838,30 @@ fn color_profile(s: &mut Session, p: &Value) -> Result<Value> {
     Ok(json!({"profile": profile.id(), "changed": changed}))
 }
 
-/// Save the file of the active tab (the main file for a branch tab, with its branches).
+/// Native saves act on the current document; a `.fig` copy exports the version shown, and a
+/// pending Save As choice must leave it shown until its destination is known.
+pub(crate) fn save_ends_preview(s: &Session, cmd: &str, p: &Value) -> bool {
+    let path =
+        string(p, "path").or_else(|| if cmd == "file.save" { s.docs.get(crate::branches::file_tab(s)).and_then(|ds| ds.path.clone()) } else { None });
+    path.is_some_and(|path| ext(&path) != "fig")
+}
+
+/// Save the file of the active tab (the main file for a branch tab, with its branches), or export
+/// the active document as an experimental `.fig` copy without changing its native save state.
 fn save_to(s: &mut Session, path: String) -> Result<Value> {
+    if ext(&path) == "fig" {
+        return export_fig(s, &json!({"path": path}));
+    }
     let i = crate::branches::file_tab(s);
     let ds = s.docs.get_mut(i).ok_or(EngineError::NoDocument)?;
-    let bytes = file_bytes(ds)?;
+    let mut snapshot = FileSnapshot::of(ds);
+    let follows_path = ds.path.as_deref().map_or(ds.doc.name == "Untitled", |old| ds.doc.name == file_stem(old));
+    if follows_path && ds.path.as_deref() != Some(path.as_str()) {
+        Arc::make_mut(&mut snapshot.doc).name = file_stem(&path);
+    }
+    let bytes = snapshot.encode()?;
     write(&path, &bytes)?;
+    ds.doc = snapshot.doc;
     ds.path = Some(path.clone());
     ds.mark_saved();
     ds.revision += 1;
@@ -795,6 +876,11 @@ fn save(s: &mut Session, p: &Value) -> Result<Value> {
         return save_to(s, path);
     }
     match s.docs.get(crate::branches::file_tab(s)).ok_or(EngineError::NoDocument)?.path.clone() {
+        // Earlier builds wrote native data under a .fig name: never overwrite that file with an export.
+        Some(path) if ext(&path) == "fig" => {
+            s.request_ui("dialog.saveAs", json!({}));
+            Err(EngineError::Disabled("file.save".into(), "the saved path ends in .fig: choose Save as or pass `path`".into()))
+        }
         Some(path) => save_to(s, path),
         None => {
             s.request_ui("dialog.saveAs", json!({}));
@@ -1119,7 +1205,7 @@ fn export_layers(s: &mut Session, p: &Value) -> Result<Value> {
                 let path = std::path::Path::new(d).join(&job.file);
                 // A layer name with slashes exports into folders.
                 if let Some(parent) = path.parent() {
-                    let _ = std::fs::create_dir_all(parent);
+                    let _ = crate::file_access::create_dir_all(parent);
                 }
                 let path = path.to_string_lossy().to_string();
                 write(&path, &bytes)?;
@@ -1215,8 +1301,9 @@ fn import(s: &mut Session, p: &Value) -> Result<Value> {
             };
             let sibling = if variables.is_none() { path.as_deref().and_then(sibling_variables) } else { None };
             let (other, rest) = load_with(&bytes, &name, variables.as_ref().or(sibling.as_ref()), images)?;
+            let summary = import_summary(&other.doc);
             let pages = append_pages(s.doc_mut()?, &other.doc)?;
-            let mut out = json!({"pages": pages});
+            let mut out = json!({"pages": pages, "summary": summary});
             if rest {
                 out["warnings"] = json!(other.issues);
             }
@@ -1252,6 +1339,19 @@ fn append_pages(doc: &mut Document, other: &Document) -> Result<Vec<NodeId>> {
             map.insert(id, doc.alloc_id());
         }
     }
+    // Library copies a .fig import keeps (cached definitions) have no library record to follow:
+    // the layers of its store come along into the store of `doc`. Recorded copies are left to
+    // `merge_store`, which shares them with copies `doc` already has.
+    let cached: Vec<NodeId> = other
+        .library_store()
+        .and_then(|s| other.node(s))
+        .map(|s| s.children.iter().copied().filter(|root| other.libraries.import_of(*root).is_none()).collect())
+        .unwrap_or_default();
+    for root in &cached {
+        for id in other.subtree(*root) {
+            map.insert(id, doc.alloc_id());
+        }
+    }
     let mut new_pages = Vec::new();
     for pg in &other.pages {
         let Some(pn) = other.node(*pg) else { continue };
@@ -1269,6 +1369,13 @@ fn append_pages(doc: &mut Document, other: &Document) -> Result<Vec<NodeId>> {
         }
         new_pages.push(np);
     }
+    if !cached.is_empty() {
+        let store = doc.ensure_library_store();
+        for root in &cached {
+            let nodes: Vec<Node> = other.subtree(*root).into_iter().filter_map(|i| other.node(i).cloned()).collect();
+            doc.paste_nodes(&nodes, &map, *root, store, None)?;
+        }
+    }
     for new in map.values() {
         let src = doc.node(*new).and_then(|n| n.source).and_then(|s| map.get(&s).copied());
         if let (Some(src), Some(n)) = (src, doc.node_mut(*new)) {
@@ -1280,7 +1387,7 @@ fn append_pages(doc: &mut Document, other: &Document) -> Result<Vec<NodeId>> {
 }
 
 fn close(s: &mut Session, p: &Value) -> Result<Value> {
-    let i = num(p, "index").map(|x| x as usize).unwrap_or(s.active);
+    let i = if get(p, "index").is_none() { s.active } else { req_index("file.close", p, "index")? };
     let Some(ds) = s.docs.get(i) else { return Err(bad("file.close", "no such document")) };
     // A branch tab's edits are in its main file already (which then has unsaved changes).
     if ds.branch_of.is_none() && ds.is_dirty() && !boolean(p, "force").unwrap_or(false) {
@@ -1288,14 +1395,36 @@ fn close(s: &mut Session, p: &Value) -> Result<Value> {
         return Err(EngineError::Disabled("file.close".into(), "the document has unsaved changes (pass force: true to discard)".into()));
     }
     let uid = ds.uid;
+    let active_uid = s.docs.get(s.active).map(|d| d.uid);
     s.docs.remove(i);
-    if s.active >= s.docs.len() {
-        s.active = s.docs.len().saturating_sub(1);
-    }
+    // Removing a tab before the active one shifts its index; keep the same document selected.
+    s.active = active_uid.and_then(|a| s.docs.iter().position(|d| d.uid == a)).unwrap_or(i.min(s.docs.len().saturating_sub(1)));
     crate::branches::close_tabs(s, uid, None);
     ok()
 }
 
+#[cfg(test)]
+mod tab_order_tests {
+    use super::*;
+
+    #[test]
+    fn moving_and_closing_inactive_tabs_preserves_the_active_document() {
+        let mut session = Session::new();
+        for name in ["Two", "Three", "Four"] {
+            session.execute("file.new", &json!({"name": name})).unwrap();
+        }
+        session.execute("doc.switch", &json!({"index": 2})).unwrap();
+        let active_uid = session.docs[session.active].uid;
+        let moved_uid = session.docs[0].uid;
+        session.execute("file.moveTab", &json!({"from": 0, "to": 2})).unwrap();
+        assert_eq!(session.docs[2].uid, moved_uid);
+        assert_eq!(session.docs[session.active].uid, active_uid);
+        session.execute("file.close", &json!({"index": 0})).unwrap();
+        assert_eq!(session.docs[session.active].uid, active_uid);
+        assert!(session.execute("file.moveTab", &json!({"from": 0, "to": 99})).is_err());
+    }
+}
+
 /// Ctrl+Tab / Ctrl+Shift+Tab: the next or previous open document, wrapping around.
 fn cycle_doc(s: &mut Session, dir: i64) -> Result<Value> {
     let n = s.docs.len() as i64;
@@ -1334,6 +1463,70 @@ mod rest_import_tests {
         doc.nodes().find(|n| matches!(n.kind, NodeKind::Instance { .. })).unwrap()
     }
 
+    /// What a .fig import with a cached library component leaves: the main in the hidden store, a
+    /// visible instance of it and a layer linked to the main's layer.
+    fn cached_import() -> Document {
+        let mut doc = Document::new("Cached");
+        let page = doc.first_page().unwrap();
+        let store = doc.ensure_library_store();
+        let main = doc
+            .create(store, NodeKind::Component { description: String::new(), props: Default::default() }, "Cached main", 0.0, 0.0, 20.0, 20.0)
+            .unwrap();
+        let body = doc.create(main, NodeKind::Rectangle, "Body", 0.0, 0.0, 20.0, 20.0).unwrap();
+        let inst =
+            doc.create(page, NodeKind::Instance { component: main, props: Default::default() }, "Cached instance", 0.0, 0.0, 20.0, 20.0).unwrap();
+        let mut copy = doc.node(body).unwrap().clone();
+        copy.id = doc.alloc_id();
+        copy.parent = None;
+        copy.source = Some(body);
+        let copy_id = copy.id;
+        doc.insert(copy, inst, None).unwrap();
+        assert!(doc.is_remote(main) && doc.node(copy_id).unwrap().source == Some(body));
+        doc
+    }
+
+    /// Pasting layers that use a cached main into another document leaves the main behind, as it
+    /// does for other mains that are not published: no link points at a layer of the target.
+    #[test]
+    fn pasting_instances_of_cached_components_leaves_no_dangling_links() {
+        let src = cached_import();
+        let mut doc = Document::new("Target");
+        let page = doc.first_page().unwrap();
+        for i in 0..8 {
+            doc.create(page, NodeKind::Rectangle, &format!("Filler {i}"), 0.0, 0.0, 5.0, 5.0).unwrap();
+        }
+        let inst = src.nodes().find(|n| n.name == "Cached instance").unwrap().id;
+        let ids = src.subtree(inst);
+        let map: std::collections::BTreeMap<NodeId, NodeId> = ids.iter().map(|i| (*i, doc.alloc_id())).collect();
+        let nodes: Vec<Node> = ids.iter().filter_map(|i| src.node(*i).cloned()).collect();
+        doc.paste_nodes(&nodes, &map, inst, page, None).unwrap();
+        crate::library::adopt_pasted(&mut doc, &src, None, &map).unwrap();
+        let pasted = doc.node(map[&inst]).unwrap();
+        let NodeKind::Instance { component, .. } = pasted.kind else { panic!() };
+        assert!(!doc.contains(component), "the main stays behind: {component:?}");
+        assert!(doc.node(pasted.children[0]).unwrap().source.is_none_or(|s| !doc.contains(s)));
+    }
+
+    #[test]
+    fn appending_pages_with_cached_library_components_brings_the_components() {
+        let other = cached_import();
+        let mut doc = Document::new("Target");
+        let page = doc.first_page().unwrap();
+        // Ids of the target that would collide with the other document's store.
+        for i in 0..8 {
+            doc.create(page, NodeKind::Rectangle, &format!("Filler {i}"), 0.0, 0.0, 5.0, 5.0).unwrap();
+        }
+        append_pages(&mut doc, &other).unwrap();
+        assert!(doc.validate().is_empty(), "{:?}", doc.validate());
+        assert!(crate::components::mirror_issues(&doc).is_empty(), "{:?}", crate::components::mirror_issues(&doc));
+        let inst = doc.nodes().find(|n| n.name == "Cached instance").unwrap();
+        let NodeKind::Instance { component, .. } = inst.kind else { panic!() };
+        assert_eq!(doc.node(component).unwrap().name, "Cached main");
+        assert!(doc.is_remote(component), "the main comes along into the store");
+        let layer = doc.node(inst.children[0]).unwrap();
+        assert_eq!(layer.source, doc.node(component).unwrap().children.first().copied());
+    }
+
     #[test]
     fn rest_json_loads_with_linked_instances() {
         let bytes = serde_json::to_vec(&kit()).unwrap();
@@ -1351,6 +1544,25 @@ mod rest_import_tests {
         assert!(thumbnail(&doc).is_some());
     }
 
+    #[test]
+    fn open_takes_data_and_a_name_as_a_new_unsaved_document() {
+        let mut saved = Session::new();
+        saved.execute("shape.rectangle", &json!({"x": 0, "y": 0, "width": 10, "height": 10})).unwrap();
+        let bytes = file_bytes(saved.ds().unwrap()).unwrap();
+        let data = base64::engine::general_purpose::STANDARD.encode(&bytes);
+        let mut s = Session::new();
+        let recent = s.prefs.recent_files.clone();
+        let r = s.execute("file.open", &json!({"data": data, "name": "Dropped.figcraft"})).unwrap();
+        let open = s.docs.len();
+        assert_eq!(r["index"], open - 1, "a document of its own, made active");
+        assert_eq!(s.ds().unwrap().path, None, "no path to save over");
+        assert!(s.doc().unwrap().nodes().any(|n| matches!(n.kind, NodeKind::Rectangle)));
+        assert_eq!(s.prefs.recent_files, recent, "nothing on disk to remember");
+        assert!(s.execute("file.open", &json!({"data": data})).is_err(), "the name tells the format");
+        assert!(s.execute("file.open", &json!({"data": "not base64!", "name": "x.svg"})).is_err());
+        assert_eq!(s.docs.len(), open, "a refused open adds nothing");
+    }
+
     #[test]
     fn open_and_import_rest_json() {
         let dir = std::env::temp_dir().join(format!("figcraft-rest-{}", std::process::id()));

crates/engine/src/cmd/layout.rs

@@ -149,6 +149,35 @@ mod tests {
         assert!(s.execute("node.set", &json!({"id": b, "props": {"absolute": "maybe"}})).is_err());
     }
 
+    /// Each side key writes its own padding slot and leaves the other three alone.
+    #[test]
+    fn each_side_padding_sets_its_side_alone() {
+        let mut s = Session::new();
+        let (f, _, _) = al_frame(&mut s);
+        // One side at a time: the other three stay 0 ([top, right, bottom, left]).
+        for (key, v, want) in [
+            ("paddingTop", 8.0, [8.0, 0.0, 0.0, 0.0]),
+            ("paddingRight", 12.0, [0.0, 12.0, 0.0, 0.0]),
+            ("paddingBottom", 16.0, [0.0, 0.0, 16.0, 0.0]),
+            ("paddingLeft", 20.0, [0.0, 0.0, 0.0, 20.0]),
+        ] {
+            ex(&mut s, "node.set", json!({"id": f, "props": {"padding": 0}}));
+            ex(&mut s, "node.set", json!({"id": f, "props": {key: v}}));
+            assert_eq!(node(&s, f).layout.as_ref().unwrap().padding, want, "{key}");
+        }
+        // The [t, r, b, l] array and the axis pairs agree with the four sides.
+        ex(&mut s, "node.set", json!({"id": f, "props": {"padding": [8, 12, 16, 20]}}));
+        assert_eq!(node(&s, f).layout.as_ref().unwrap().padding, [8.0, 12.0, 16.0, 20.0]);
+        ex(&mut s, "node.set", json!({"id": f, "props": {"paddingHorizontal": 4}}));
+        assert_eq!(node(&s, f).layout.as_ref().unwrap().padding, [8.0, 4.0, 16.0, 4.0]);
+        ex(&mut s, "node.set", json!({"id": f, "props": {"paddingVertical": 2}}));
+        assert_eq!(node(&s, f).layout.as_ref().unwrap().padding, [2.0, 4.0, 2.0, 4.0]);
+        // Negatives clamp to 0; junk is refused.
+        ex(&mut s, "node.set", json!({"id": f, "props": {"paddingTop": -5}}));
+        assert_eq!(node(&s, f).layout.as_ref().unwrap().padding[0], 0.0);
+        assert!(s.execute("node.set", &json!({"id": f, "props": {"paddingLeft": "wide"}})).is_err());
+    }
+
     #[test]
     fn baseline_alignment_lines_up_text() {
         let mut s = Session::new();

crates/engine/src/cmd/lists.rs

@@ -112,7 +112,8 @@ pub fn stop_binding(field: &str) -> Option<usize> {
 /// Keep the gradient stop bindings of paint `index` of `n`'s fills (or strokes) on their stops after
 /// the paint changed from `old`: one stop removed shifts the later ones down (the removed one's
 /// binding goes); a paint that is no longer a gradient drops them. Other edits keep stop indices.
-pub(crate) fn remap_stop_bindings(n: &mut Node, fills: bool, index: usize, old: &figcraft_color::Paint) {
+/// Returns the removed stop's index.
+pub(crate) fn remap_stop_bindings(n: &mut Node, fills: bool, index: usize, old: &figcraft_color::Paint) -> Option<usize> {
     use figcraft_color::PaintKind;
     let list = if fills { BoundList::Fills } else { BoundList::Strokes };
     let new = if fills { n.fills.get(index) } else { n.strokes.get(index) };
@@ -122,11 +123,11 @@ pub(crate) fn remap_stop_bindings(n: &mut Node, fills: bool, index: usize, old:
             // The first stop that differs is the removed one when the rest moved down unchanged.
             let k = a.stops.iter().zip(&b.stops).position(|(x, y)| x != y).unwrap_or(b.stops.len());
             if a.stops.get(k + 1..) != b.stops.get(k..) {
-                return;
+                return None;
             }
             Some(k)
         }
-        (_, Some(PaintKind::Gradient(_))) => return,
+        (_, Some(PaintKind::Gradient(_))) => return None,
         _ => None,
     };
     let keys: Vec<(String, Option<String>)> = n
@@ -150,6 +151,42 @@ pub(crate) fn remap_stop_bindings(n: &mut Node, fills: bool, index: usize, old:
         }
     }
     n.bound.extend(kept);
+    removed
+}
+
+/// After an explicit edit changed paint `index` of `n`'s fills (or strokes) from `old`: its stop
+/// bindings follow a removed stop, then each binding whose value the edit changed (the colour, the
+/// opacity, a stop's colour) lets go, so the edit stays instead of being put back from the
+/// variable. Bindings whose value the edit kept stay; a paint that is gone takes its bindings.
+pub(crate) fn rebind_edited_paint(n: &mut Node, fills: bool, index: usize, old: &figcraft_color::Paint) {
+    let removed = remap_stop_bindings(n, fills, index, old);
+    let mut old = old.clone();
+    if let (Some(k), figcraft_color::PaintKind::Gradient(g)) = (removed, &mut old.kind)
+        && k < g.stops.len()
+    {
+        g.stops.remove(k);
+    }
+    let list = if fills { BoundList::Fills } else { BoundList::Strokes };
+    let new = if fills { n.fills.get(index) } else { n.strokes.get(index) }.cloned();
+    n.bound.retain(|key, _| match list_binding(key) {
+        Some((l, i, field)) if l == list && i == index => new.as_ref().is_some_and(|new| paint_field_kept(&old, new, field)),
+        _ => true,
+    });
+}
+
+/// Whether a paint's bound `field` (`color`, `opacity`, `stops/<j>/color`, …) has the same value in
+/// `new` as in `old`.
+fn paint_field_kept(old: &figcraft_color::Paint, new: &figcraft_color::Paint, field: &str) -> bool {
+    use figcraft_color::PaintKind;
+    match field {
+        "color" => matches!((&old.kind, &new.kind), (PaintKind::Solid { color: a }, PaintKind::Solid { color: b }) if a == b),
+        "opacity" => old.opacity == new.opacity,
+        _ => match (stop_binding(field), &old.kind, &new.kind) {
+            (Some(j), PaintKind::Gradient(a), PaintKind::Gradient(b)) => a.stops.get(j).map(|s| s.color) == b.stops.get(j).map(|s| s.color),
+            (Some(_), _, _) => false,
+            _ => old == new,
+        },
+    }
 }
 
 /// Where item `k` lands when the item at `from` moves to `to`.

crates/engine/src/cmd/mod.rs

@@ -71,6 +71,7 @@ fn registry() -> &'static Registry {
         list.extend(create::specs());
         list.extend(edit::specs());
         list.extend(lists::specs());
+        list.extend(crate::selection_colors::specs());
         list.extend(arrange::specs());
         list.extend(structure::specs());
         list.extend(section::specs());
@@ -79,6 +80,7 @@ fn registry() -> &'static Registry {
         list.extend(page::specs());
         list.extend(view::specs());
         list.extend(text::specs());
+        list.extend(crate::fonts::specs());
         list.extend(styles::specs());
         list.extend(image::specs());
         list.extend(variables::specs());

crates/engine/src/cmd/page.rs

@@ -97,11 +97,13 @@ pub fn specs() -> Vec<CommandSpec> {
             let doc = s.doc_mut()?;
             let name = format!("Copy of {}", doc.get(src)?.name);
             let np = doc.add_page(&name);
-            // Each layer and its copy (also those in sections), so flows can follow their start frames.
+            // One copy with one id map, so navigation between the copied frames points at the copies;
+            // then each layer and its copy (also those in sections), so flows can follow their start frames.
+            let children = doc.get(src)?.children.clone();
+            let copied = doc.duplicate_all_into(&children, np)?;
             let mut copies = Vec::new();
-            for c in doc.get(src)?.children.clone() {
-                let copy = doc.duplicate_into(c, np, None)?;
-                copies.extend(doc.subtree(c).into_iter().zip(doc.subtree(copy)));
+            for (c, copy) in children.iter().zip(&copied) {
+                copies.extend(doc.subtree(*c).into_iter().zip(doc.subtree(*copy)));
             }
             // The copy keeps the page's colour, flows (pointing at the copied frames), prototype settings and guides.
             if let NodeKind::Page { background, flows, prototype, guides } = doc.get(src)?.kind.clone()

crates/engine/src/cmd/props.rs

@@ -30,6 +30,11 @@ fontVariations / variationSettings ({axis: number}, e.g. {\"wght\": 550, \"wdth\
 arcInner, booleanOperation (a boolean group's operation, or an operand's own; null: the group's), operandOperation (a layer in a boolean \
 group: how it combines with the operands below it; null: the group's), constrainProportions, description, interactions, overflow, pluginData {k: v}";
 
+/// CRLF, bare CR, U+2028 and U+2029 become LF, the only line ending text layout understands (editor insertion does the same).
+pub(crate) fn normalize_line_endings(s: &str) -> String {
+    s.replace("\r\n", "\n").replace(['\r', '\u{2028}', '\u{2029}'], "\n")
+}
+
 /// camelCase object keys → snake_case (accept the inspect/camel forms for serde-backed values).
 pub fn snake(v: &Value) -> Value {
     match v {
@@ -56,6 +61,48 @@ pub fn snake(v: &Value) -> Value {
     }
 }
 
+/// `v` as an effect list, refusing keys an effect doesn't read: serde dropped them without a word,
+/// so a shadow given `offsetY` kept the default offset.
+pub fn effects_from(cmd: &str, v: &Value) -> Result<Vec<Effect>> {
+    let effects: Vec<Effect> = serde_json::from_value(snake(v)).map_err(|e| bad(cmd, format!("effects: {e}")))?;
+    for (i, given) in v.as_array().into_iter().flatten().enumerate() {
+        refuse_ignored_effect_keys(cmd, &format!("effects[{i}]"), given, |v| serde_json::from_value(snake(v)).ok())?;
+    }
+    Ok(effects)
+}
+
+/// `p[key]` as one effect, read as serde reads it (its aliases too), refusing keys it doesn't read.
+pub fn effect_from(cmd: &str, p: &Value, key: &str) -> Result<Option<Effect>> {
+    let Some(v) = get(p, key) else { return Ok(None) };
+    let effect: Effect = serde_json::from_value(v.clone()).map_err(|e| bad(cmd, format!("`{key}`: {e}")))?;
+    refuse_ignored_effect_keys(cmd, &format!("`{key}`"), v, |v| serde_json::from_value(v.clone()).ok())?;
+    Ok(Some(effect))
+}
+
+/// Refuse the keys of effect `given` that `parse` ignores, naming the keys the effect takes. Set to
+/// null, a key it reads fails to parse or changes the effect; a key it ignores changes nothing.
+fn refuse_ignored_effect_keys(cmd: &str, at: &str, given: &Value, parse: impl Fn(&Value) -> Option<Effect>) -> Result<()> {
+    let Some(fields) = given.as_object() else { return Ok(()) };
+    let parsed = parse(given);
+    let ignored: Vec<&str> = fields
+        .iter()
+        .filter(|(_, v)| !v.is_null())
+        .filter(|(k, _)| {
+            let mut probe = fields.clone();
+            probe.insert((*k).clone(), Value::Null);
+            parse(&Value::Object(probe)).is_some_and(|e| Some(e) == parsed)
+        })
+        .map(|(k, _)| k.as_str())
+        .collect();
+    if ignored.is_empty() {
+        return Ok(());
+    }
+    let takes = parsed.and_then(|e| serde_json::to_value(e).ok()).map(crate::inspect::camel).unwrap_or_default();
+    let kind = takes.get("type").and_then(Value::as_str).unwrap_or("effect").to_string();
+    let names: Vec<&str> = takes.as_object().into_iter().flatten().map(|(k, _)| k.as_str()).collect();
+    Err(bad(cmd, format!("{at}: unknown properties: {} (a {kind} takes {})", ignored.join(", "), names.join(", "))))
+}
+
 pub(crate) fn enum_of<T: serde::de::DeserializeOwned>(v: &Value) -> Option<T> {
     let s = v.as_str()?;
     // Accept camelCase, snake/upper-case and spaced variants.
@@ -260,18 +307,88 @@ fn ensure_layout(n: &mut Node) -> &mut AutoLayout {
     n.layout.get_or_insert_with(|| AutoLayout { padding: [0.0; 4], gap: 0.0, ..Default::default() })
 }
 
-/// Apply a property map to one node. `x`/`y` are relative to the parent.
-pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Value>) -> Result<()> {
-    let mut unknown = Vec::new();
-    // Geometry keys first so rotation applies to the final size.
-    let order = |k: &str| match k {
+/// The keys that set a frame's auto layout (through [`layout_mut`]).
+pub const LAYOUT_KEYS: &[&str] = &[
+    "gap",
+    "itemSpacing",
+    "columnGap",
+    "crossGap",
+    "counterAxisSpacing",
+    "rowGap",
+    "padding",
+    "paddingTop",
+    "paddingRight",
+    "paddingBottom",
+    "paddingLeft",
+    "paddingHorizontal",
+    "paddingVertical",
+    "mainAlign",
+    "primaryAxisAlignItems",
+    "crossAlign",
+    "counterAxisAlignItems",
+    "contentAlign",
+    "counterAxisAlignContent",
+    "wrap",
+    "gridColumns",
+    "gridRows",
+    "strokesIncluded",
+    "reverseZ",
+    "columnTracks",
+    "gridColumnTracks",
+    "rowTracks",
+    "gridRowTracks",
+];
+
+/// Drop the bindings of auto layout fields (gap, padding…): they go with the auto layout, or
+/// re-applying them would bring it back.
+pub fn drop_layout_bindings(n: &mut Node) {
+    n.bound.retain(|k, _| !LAYOUT_KEYS.contains(&k.as_str()));
+}
+
+/// The auto layout of a frame-like node, created when it has none yet. Other nodes can't hold an
+/// auto layout: an auto layout key on them is refused, not stored where nothing reads it
+/// (`node.set` on several layers skips them instead, see `edit::set`).
+fn layout_mut<'a>(cmd: &str, k: &str, n: &'a mut Node) -> Result<&'a mut AutoLayout> {
+    if !n.kind.is_frame_like() {
+        return Err(bad(
+            cmd,
+            format!(
+                "`{k}` is an auto layout property, and layer {} “{}” is a {} (only frames, components and instances have auto layout)",
+                n.id,
+                n.name,
+                n.kind.type_name()
+            ),
+        ));
+    }
+    Ok(ensure_layout(n))
+}
+
+/// Replace a node's fills (or strokes). Bindings on the paints whose bound values the new list
+/// changed let go, as an explicit edit does (see `lists::rebind_edited_paint`).
+fn set_paints(n: &mut Node, fills: bool, paints: Vec<Paint>) {
+    let old = std::mem::replace(if fills { &mut n.fills } else { &mut n.strokes }, paints);
+    for (i, p) in old.iter().enumerate() {
+        super::lists::rebind_edited_paint(n, fills, i, p);
+    }
+}
+
+/// The order [`apply`] takes keys in: geometry first so rotation applies to the final size, variable
+/// bindings last so paints set in the same call don't detach them.
+fn apply_order(k: &str) -> u8 {
+    match k {
         "width" | "height" | "w" | "h" => 0,
         "rotation" => 2,
         "x" | "y" => 3,
+        "boundVariables" => 4,
         _ => 1,
-    };
+    }
+}
+
+/// Apply a property map to one node. `x`/`y` are relative to the parent.
+pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Value>) -> Result<()> {
+    let mut unknown = Vec::new();
     let mut keys: Vec<(&String, &Value)> = props.iter().collect();
-    keys.sort_by_key(|(k, _)| order(k));
+    keys.sort_by_key(|(k, _)| apply_order(k));
     for (k, v) in keys {
         let k = k.as_str();
         match k {
@@ -343,15 +460,15 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
                 let b = v.as_str().and_then(figcraft_color::BlendMode::from_name).ok_or_else(|| bad(cmd, "unknown blend mode"))?;
                 doc.get_mut(id)?.blend = b;
             }
-            "fills" => doc.get_mut(id)?.fills = paints_of(v).ok_or_else(|| bad(cmd, "`fills` must be paints or colours"))?,
+            "fills" => set_paints(doc.get_mut(id)?, true, paints_of(v).ok_or_else(|| bad(cmd, "`fills` must be paints or colours"))?),
             "fill" => {
                 let c = color_of(v).ok_or_else(|| bad(cmd, "`fill` must be a colour"))?;
-                doc.get_mut(id)?.fills = vec![Paint::solid(c)];
+                set_paints(doc.get_mut(id)?, true, vec![Paint::solid(c)]);
             }
-            "strokes" => doc.get_mut(id)?.strokes = paints_of(v).ok_or_else(|| bad(cmd, "`strokes` must be paints or colours"))?,
+            "strokes" => set_paints(doc.get_mut(id)?, false, paints_of(v).ok_or_else(|| bad(cmd, "`strokes` must be paints or colours"))?),
             "stroke" => {
                 let c = color_of(v).ok_or_else(|| bad(cmd, "`stroke` must be a colour"))?;
-                doc.get_mut(id)?.strokes = vec![Paint::solid(c)];
+                set_paints(doc.get_mut(id)?, false, vec![Paint::solid(c)]);
             }
             "strokeWeight" => doc.get_mut(id)?.stroke.weight = f64_of(v).ok_or_else(|| bad(cmd, "`strokeWeight` must be a number"))?.max(0.0),
             "strokeAlign" => doc.get_mut(id)?.stroke.align = enum_of(v).ok_or_else(|| bad(cmd, "strokeAlign: inside|center|outside"))?,
@@ -407,7 +524,7 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
                 }
             }
             "cornerSmoothing" => doc.get_mut(id)?.corners.smoothing = f64_of(v).unwrap_or(0.0).clamp(0.0, 1.0),
-            "effects" => doc.get_mut(id)?.effects = serde_json::from_value(snake(v)).map_err(|e| bad(cmd, format!("effects: {e}")))?,
+            "effects" => doc.get_mut(id)?.effects = effects_from(cmd, v)?,
             "clip" | "clipsContent" => doc.get_mut(id)?.clip = v.as_bool().ok_or_else(|| bad(cmd, "`clip` must be a boolean"))?,
             "isMask" => doc.get_mut(id)?.is_mask = v.as_bool().unwrap_or(false),
             "devStatus" => {
@@ -431,8 +548,14 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
                     return Err(bad(cmd, "auto layout needs a frame"));
                 }
                 match v {
-                    Value::Null => n.layout = None,
-                    Value::String(s) if s.eq_ignore_ascii_case("none") => n.layout = None,
+                    Value::Null => {
+                        n.layout = None;
+                        drop_layout_bindings(n);
+                    }
+                    Value::String(s) if s.eq_ignore_ascii_case("none") => {
+                        n.layout = None;
+                        drop_layout_bindings(n);
+                    }
                     Value::String(s) => {
                         let mode = match s.to_ascii_lowercase().as_str() {
                             "horizontal" | "row" => LayoutMode::Horizontal,
@@ -447,56 +570,56 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
                 }
             }
             "gap" | "itemSpacing" | "columnGap" => {
-                ensure_layout(doc.get_mut(id)?).gap = f64_of(v).ok_or_else(|| bad(cmd, format!("`{k}` must be a number")))?
+                layout_mut(cmd, k, doc.get_mut(id)?)?.gap = f64_of(v).ok_or_else(|| bad(cmd, format!("`{k}` must be a number")))?
             }
             "crossGap" | "counterAxisSpacing" | "rowGap" => {
-                ensure_layout(doc.get_mut(id)?).cross_gap = f64_of(v).ok_or_else(|| bad(cmd, format!("`{k}` must be a number")))?
+                layout_mut(cmd, k, doc.get_mut(id)?)?.cross_gap = f64_of(v).ok_or_else(|| bad(cmd, format!("`{k}` must be a number")))?
             }
             "padding" => {
                 let p = four(v).ok_or_else(|| bad(cmd, "padding: n or [t,r,b,l]"))?;
-                ensure_layout(doc.get_mut(id)?).padding = p.map(|x| x.max(0.0));
+                layout_mut(cmd, k, doc.get_mut(id)?)?.padding = p.map(|x| x.max(0.0));
             }
             "paddingTop" | "paddingRight" | "paddingBottom" | "paddingLeft" => {
                 let i = ["paddingTop", "paddingRight", "paddingBottom", "paddingLeft"].iter().position(|x| *x == k).unwrap_or(0);
                 let val = f64_of(v).ok_or_else(|| bad(cmd, format!("`{k}` must be a number")))?.max(0.0);
-                if let Some(slot) = ensure_layout(doc.get_mut(id)?).padding.get_mut(i) {
+                if let Some(slot) = layout_mut(cmd, k, doc.get_mut(id)?)?.padding.get_mut(i) {
                     *slot = val;
                 }
             }
             "paddingHorizontal" => {
                 let val = f64_of(v).unwrap_or(0.0).max(0.0);
-                let l = ensure_layout(doc.get_mut(id)?);
+                let l = layout_mut(cmd, k, doc.get_mut(id)?)?;
                 l.padding[1] = val;
                 l.padding[3] = val;
             }
             "paddingVertical" => {
                 let val = f64_of(v).unwrap_or(0.0).max(0.0);
-                let l = ensure_layout(doc.get_mut(id)?);
+                let l = layout_mut(cmd, k, doc.get_mut(id)?)?;
                 l.padding[0] = val;
                 l.padding[2] = val;
             }
             "mainAlign" | "primaryAxisAlignItems" => {
-                ensure_layout(doc.get_mut(id)?).main_align =
+                layout_mut(cmd, k, doc.get_mut(id)?)?.main_align =
                     enum_of(v).ok_or_else(|| bad(cmd, "mainAlign: min|center|max|spaceBetween|spaceAround|spaceEvenly"))?
             }
             "crossAlign" | "counterAxisAlignItems" => {
-                ensure_layout(doc.get_mut(id)?).cross_align = enum_of(v).ok_or_else(|| bad(cmd, "crossAlign: min|center|max|baseline"))?
+                layout_mut(cmd, k, doc.get_mut(id)?)?.cross_align = enum_of(v).ok_or_else(|| bad(cmd, "crossAlign: min|center|max|baseline"))?
             }
             "contentAlign" | "counterAxisAlignContent" => {
-                ensure_layout(doc.get_mut(id)?).content_align = enum_of(v).ok_or_else(|| bad(cmd, "contentAlign: auto|spaceBetween"))?
+                layout_mut(cmd, k, doc.get_mut(id)?)?.content_align = enum_of(v).ok_or_else(|| bad(cmd, "contentAlign: auto|spaceBetween"))?
             }
-            "wrap" => ensure_layout(doc.get_mut(id)?).wrap = v.as_bool().unwrap_or(false),
+            "wrap" => layout_mut(cmd, k, doc.get_mut(id)?)?.wrap = v.as_bool().unwrap_or(false),
             "gridColumns" | "gridRows" => {
                 let count = f64_of(v).ok_or_else(|| bad(cmd, format!("`{k}` must be a number")))?.clamp(1.0, 1000.0) as u32;
-                let l = ensure_layout(doc.get_mut(id)?);
+                let l = layout_mut(cmd, k, doc.get_mut(id)?)?;
                 // Tracks past the new count go away (new tracks are 1fr).
                 let (n, tracks) =
                     if k == "gridColumns" { (&mut l.grid_columns, &mut l.column_tracks) } else { (&mut l.grid_rows, &mut l.row_tracks) };
                 *n = count;
                 tracks.truncate(count as usize);
             }
-            "strokesIncluded" => ensure_layout(doc.get_mut(id)?).strokes_included = v.as_bool().unwrap_or(false),
-            "reverseZ" => ensure_layout(doc.get_mut(id)?).reverse_z = v.as_bool().unwrap_or(false),
+            "strokesIncluded" => layout_mut(cmd, k, doc.get_mut(id)?)?.strokes_included = v.as_bool().unwrap_or(false),
+            "reverseZ" => layout_mut(cmd, k, doc.get_mut(id)?)?.reverse_z = v.as_bool().unwrap_or(false),
             "sizingH" | "layoutSizingHorizontal" => {
                 let s = sizing(v).ok_or_else(|| bad(cmd, "sizing: fixed|hug|fill"))?;
                 set_sizing(cmd, doc, id, s, true)?;
@@ -528,7 +651,7 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
             "columnTracks" | "gridColumnTracks" | "rowTracks" | "gridRowTracks" => {
                 let a = v.as_array().ok_or_else(|| bad(cmd, format!("`{k}` must be an array of tracks")))?;
                 let tracks = a.iter().map(track_of).collect::<Option<Vec<_>>>().ok_or_else(|| bad(cmd, TRACK_HELP))?;
-                let l = ensure_layout(doc.get_mut(id)?);
+                let l = layout_mut(cmd, k, doc.get_mut(id)?)?;
                 if k.contains("olumn") {
                     l.grid_columns = (tracks.len() as u32).clamp(1, 1000);
                     l.column_tracks = tracks;
@@ -599,7 +722,7 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
                 let n = doc.get_mut(id)?;
                 let t = text_mut(cmd, n)?;
                 let len = t.char_count();
-                t.replace_range(0, len, &s);
+                t.replace_range(0, len, &normalize_line_endings(&s));
                 n.overrides.insert("characters".into());
             }
             "fontFamily"
@@ -720,10 +843,15 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
                     for (field, var) in o {
                         match var.as_str() {
                             Some(vid) => {
+                                if n.bound.get(field).map(String::as_str) != Some(vid) {
+                                    crate::cmd::styles::rebind_paint_alpha(&mut n.fills, &mut n.strokes, field, true);
+                                }
                                 n.bound.insert(field.clone(), vid.to_string());
                             }
                             None => {
-                                n.bound.remove(field);
+                                if n.bound.remove(field).is_some() {
+                                    crate::cmd::styles::rebind_paint_alpha(&mut n.fills, &mut n.strokes, field, false);
+                                }
                             }
                         }
                     }
@@ -778,12 +906,14 @@ pub fn apply(cmd: &str, doc: &mut Document, id: NodeId, props: &Map<String, Valu
     if !unknown.is_empty() {
         return Err(bad(cmd, format!("unknown properties: {} (known: {KEYS})", unknown.join(", "))));
     }
-    // Inside an instance, record which property groups were overridden (an instance's own export
-    // settings and interactions are its own, not overrides).
+    // Inside an instance, record which property groups were overridden (an instance's own
+    // resizing, export settings and interactions are its own, not overrides).
     let own_root = matches!(doc.get(id)?.kind, NodeKind::Instance { .. }) && !crate::components::inside_instance(doc, id);
     let n = doc.get_mut(id)?;
     if n.source.is_some() {
-        for g in props.keys().map(|k| override_group(k)).filter(|g| *g != "other" && !(own_root && matches!(*g, "exports" | "interactions"))) {
+        for g in
+            props.keys().map(|k| override_group(k)).filter(|g| *g != "other" && !(own_root && matches!(*g, "resizing" | "exports" | "interactions")))
+        {
             n.overrides.insert(g.to_string());
         }
     }
@@ -805,7 +935,8 @@ pub fn override_group(k: &str) -> &'static str {
         "features" | "fontFeatures" | "openTypeFeatures" | "listStyle" | "indentation" | "listSpacing" | "maxLines" | "variationSettings"
         | "hangingPunctuation" | "hangingList" => "textStyle",
         "cornerRadius" | "cornerSmoothing" | "topLeftRadius" | "topRightRadius" | "bottomRightRadius" | "bottomLeftRadius" => "corners",
-        "width" | "height" | "w" | "h" | "sizingH" | "sizingV" => "size",
+        "width" | "height" | "w" | "h" => "size",
+        "sizingH" | "sizingV" | "layoutSizingHorizontal" | "layoutSizingVertical" | "minWidth" | "maxWidth" | "minHeight" | "maxHeight" => "resizing",
         "gap" | "itemSpacing" | "columnGap" | "crossGap" | "counterAxisSpacing" | "rowGap" => "gap",
         "padding" | "paddingTop" | "paddingRight" | "paddingBottom" | "paddingLeft" | "paddingHorizontal" | "paddingVertical" => "padding",
         "mainAlign" | "primaryAxisAlignItems" | "crossAlign" | "counterAxisAlignItems" | "contentAlign" | "counterAxisAlignContent" => "alignment",

crates/engine/src/cmd/structure.rs

@@ -10,11 +10,13 @@ use super::{CommandSpec, ok};
 use crate::params::*;
 use crate::{EngineError, Result, Session, bad, spec};
 
+/// The layer structure commands: group, frame, mask, boolean operations, flatten, auto layout
+/// add/remove, move to page and vector path edits.
 pub fn specs() -> Vec<CommandSpec> {
     vec![
-        spec!("object.group", "Group selection", "{ids?, name?}", true, |s, p| wrap(s, p, Wrap::Group)),
+        spec!("object.group", "Group selection", "{ids?, name?}", true, |s, p| wrap(s, p, "object.group", Wrap::Group)),
         spec!("object.ungroup", "Ungroup selection", "{ids?}", true, ungroup),
-        spec!("object.frameSelection", "Frame selection", "{ids?, name?}", true, |s, p| wrap(s, p, Wrap::Frame)),
+        spec!("object.frameSelection", "Frame selection", "{ids?, name?}", true, |s, p| wrap(s, p, "object.frameSelection", Wrap::Frame)),
         spec!("object.removeFrame", "Remove frame", "{ids?}", true, ungroup),
         spec!(
             "object.convertToGroup",
@@ -26,16 +28,23 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "object.convertToFrame",
             "Convert to frame",
-            "{ids?} (groups become frames of the same box in place, their layers staying where they are: no fill, not clipping. Frames are left alone; instances, main components and layers inside instances are refused)",
+            "{ids?} (groups become frames of the same box in place, their layers staying where they are: no fill, not clipping; sections become frames that keep their fill and don't clip. Frames are left alone; instances, main components, layers inside instances and sections holding sections are refused)",
             true,
             |s, p| convert(s, p, "object.convertToFrame", true)
         ),
+        spec!(
+            "object.convertToSection",
+            "Convert to section",
+            "{ids?} (frames on the page or in a section become sections in place, keeping their fill and layers; what only a frame has goes: auto layout, clipping, layout grids, guides and scrolling. Sections are left alone; nested frames, instances and main components are refused)",
+            true,
+            convert_to_section
+        ),
         spec!(
             "object.wrapInSection",
             "Wrap in new section",
             "{ids?, name?} (layers on the page or in a section; the section wraps them with some room)",
             true,
-            |s, p| wrap(s, p, Wrap::Section)
+            |s, p| wrap(s, p, "object.wrapInSection", Wrap::Section)
         ),
         spec!(
             "object.resizeToFit",
@@ -64,7 +73,9 @@ pub fn specs() -> Vec<CommandSpec> {
                 // Hugging needs auto layout and the children that filled have nothing to fill: both
                 // become fixed (the frame keeps filling its own auto layout parent).
                 let doc = s.doc_mut()?;
-                doc.get_mut(i)?.layout = None;
+                let n = doc.get_mut(i)?;
+                n.layout = None;
+                super::props::drop_layout_bindings(n);
                 figcraft_layout::coherent_sizing(doc, i);
             }
             ok()
@@ -121,26 +132,27 @@ const SECTION_PAD: f64 = 40.0;
 const BOOL_PARAMS: &str = "{ids?} — layers inside boolean groups: sets their own operation (how each combines with the operands below it); one boolean group: sets its operation (every operand follows it); otherwise wraps the layers in a new boolean group";
 
 /// Wrap the selection in a new boolean group doing `op`.
-pub(crate) fn wrap_boolean(s: &mut Session, p: &Value, op: BoolOp) -> Result<Value> {
-    wrap(s, p, Wrap::Bool(op))
+pub(crate) fn wrap_boolean(s: &mut Session, p: &Value, cmd: &str, op: BoolOp) -> Result<Value> {
+    wrap(s, p, cmd, Wrap::Bool(op))
 }
 
-/// Wrap the selection in a new container at the topmost selected layer's place.
-fn wrap(s: &mut Session, p: &Value, w: Wrap) -> Result<Value> {
-    let ids = req_targets("object.group", s, p)?;
+/// Wrap the selection in a new container at the topmost selected layer's place. Errors name `cmd`,
+/// the command that asked.
+fn wrap(s: &mut Session, p: &Value, cmd: &str, w: Wrap) -> Result<Value> {
+    let ids = req_targets(cmd, s, p)?;
     let doc = s.doc_mut()?;
     let ids = z_sorted(doc, &roots(doc, &ids));
-    let top = *ids.last().ok_or_else(|| bad("object.group", "nothing selected"))?;
-    let parent = doc.get(top)?.parent.ok_or_else(|| bad("object.group", "can't group a page"))?;
+    let top = *ids.last().ok_or_else(|| bad(cmd, "nothing selected"))?;
+    let parent = doc.get(top)?.parent.ok_or_else(|| bad(cmd, "can't group a page"))?;
     // Sections sit on the page or in sections, never in frames or groups.
     let board = |doc: &Document, i: NodeId| {
         doc.node(i).and_then(|n| n.parent).and_then(|p| doc.node(p)).is_some_and(|p| p.is_page() || matches!(p.kind, NodeKind::Section { .. }))
     };
     if matches!(w, Wrap::Section) && !ids.iter().all(|i| board(doc, *i)) {
-        return Err(bad("object.wrapInSection", "only layers on the page or in a section can be wrapped in a section"));
+        return Err(bad(cmd, "only layers on the page or in a section can be wrapped in a section"));
     }
     if !matches!(w, Wrap::Section) && ids.iter().any(|i| doc.node(*i).is_some_and(|n| matches!(n.kind, NodeKind::Section { .. }))) {
-        return Err(bad("object.group", "sections can't go in groups or frames"));
+        return Err(bad(cmd, "sections can't go in groups or frames"));
     }
     let index = doc.index_in_parent(top).map(|i| i + 1);
     let mut bounds = doc.bounds_of(&ids).unwrap_or_default();
@@ -199,6 +211,13 @@ fn convert(s: &mut Session, p: &Value, cmd: &'static str, to_frame: bool) -> Res
         let n = doc.get(i)?;
         let refuse = |why: &str| Err(bad(cmd, format!("\"{}\" {why}", n.name)));
         match (&n.kind, to_frame) {
+            // A frame can't hold sections.
+            (NodeKind::Section { .. }, true)
+                if n.children.iter().any(|c| doc.node(*c).is_some_and(|c| matches!(c.kind, NodeKind::Section { .. }))) =>
+            {
+                return refuse("holds sections, which can't go inside a frame: convert those first");
+            }
+            (NodeKind::Section { .. }, true) => todo.push(i),
             (NodeKind::Instance { .. }, _) => return refuse("is an instance: its layers come from its main component (detach it first)"),
             (NodeKind::Component { .. }, _) => return refuse("is a main component, which stays a frame"),
             (NodeKind::Frame | NodeKind::Group, _) if crate::components::owning_instance(doc, i).is_some() => {
@@ -212,12 +231,15 @@ fn convert(s: &mut Session, p: &Value, cmd: &'static str, to_frame: bool) -> Res
     }
     for i in &todo {
         if to_frame {
-            // The group's box as it is; nothing painted or clipped, so the look stays.
+            // The box as it is and nothing clipped, so the look stays: a group has nothing painted, a
+            // section keeps its fill.
             let n = doc.get_mut(*i)?;
+            if matches!(n.kind, NodeKind::Group) {
+                n.fills.clear();
+                n.strokes.clear();
+            }
             n.kind = NodeKind::Frame;
             n.clip = false;
-            n.fills.clear();
-            n.strokes.clear();
             continue;
         }
         let n = doc.get_mut(*i)?;
@@ -242,6 +264,43 @@ fn convert(s: &mut Session, p: &Value, cmd: &'static str, to_frame: bool) -> Res
     Ok(json!({"ids": todo}))
 }
 
+/// Frames on the page or in a section become sections in place (sections only sit there).
+fn convert_to_section(s: &mut Session, p: &Value) -> Result<Value> {
+    let cmd = "object.convertToSection";
+    let ids = req_targets(cmd, s, p)?;
+    let doc = s.doc_mut()?;
+    let mut todo = Vec::new();
+    for i in ids {
+        let n = doc.get(i)?;
+        let refuse = |why: &str| Err(bad(cmd, format!("\"{}\" {why}", n.name)));
+        let on_board = n.parent.and_then(|p| doc.node(p)).is_some_and(|p| p.is_page() || matches!(p.kind, NodeKind::Section { .. }));
+        match &n.kind {
+            NodeKind::Section { .. } => {}
+            NodeKind::Instance { .. } => return refuse("is an instance: its layers come from its main component (detach it first)"),
+            NodeKind::Component { .. } | NodeKind::ComponentSet { .. } => return refuse("is a main component, which stays a frame"),
+            NodeKind::Frame if !on_board => return refuse("is inside a frame or group: only frames on the page or in a section become sections"),
+            NodeKind::Frame => todo.push(i),
+            _ => return refuse("is not a frame"),
+        }
+    }
+    for i in &todo {
+        let n = doc.get_mut(*i)?;
+        n.kind = NodeKind::Section { contents_hidden: false };
+        (n.layout, n.clip, n.overflow) = (None, false, proto::Overflow::None);
+        n.grids.clear();
+        n.guides.clear();
+        n.styles.grid = None;
+        super::props::drop_layout_bindings(n);
+        let kids = n.children.clone();
+        for k in kids {
+            // Out of the flow there is nothing to fill or to be absolute against.
+            doc.get_mut(k)?.child_layout.absolute = false;
+        }
+        figcraft_layout::coherent_sizing(doc, *i);
+    }
+    Ok(json!({"ids": todo}))
+}
+
 fn ungroup(s: &mut Session, p: &Value) -> Result<Value> {
     let ids = req_targets("object.ungroup", s, p)?;
     let doc = s.doc_mut()?;
@@ -284,7 +343,7 @@ fn mask(s: &mut Session, p: &Value) -> Result<Value> {
         return ok();
     }
     // Group, then the bottom-most child is the mask.
-    let r = wrap(s, &json!({"ids": ids, "name": "Mask group"}), Wrap::Group)?;
+    let r = wrap(s, &json!({"ids": ids, "name": "Mask group"}), "object.mask", Wrap::Group)?;
     let gid = id_of(&r["id"]).ok_or_else(|| EngineError::Other("group failed".into()))?;
     let doc = s.doc_mut()?;
     if let Some(first) = doc.get(gid)?.children.first().copied() {
@@ -309,33 +368,46 @@ fn flatten(s: &mut Session, p: &Value) -> Result<Value> {
     let parent = doc.get(top)?.parent.ok_or_else(|| bad("vector.flatten", "can't flatten a page"))?;
     let index = doc.index_in_parent(top).map(|i| i + 1);
     let pw = doc.world_transform(parent);
-    let mut path = BezPath::new();
-    let mut even = false;
+    let mut net = VectorNetwork::default();
     for i in &ids {
         let Some(n) = doc.node(*i) else { continue };
-        // Booleans flatten to their result; strokes don't get outlined.
-        let Some((mut op, rule)) = (match &n.kind {
-            NodeKind::Group | NodeKind::Frame | NodeKind::Component { .. } | NodeKind::Instance { .. } => figcraft_render::subtree_outline(doc, n, 0),
-            _ => figcraft_render::node_outline(doc, n),
-        }) else {
-            continue;
+        // Vectors keep their own network (open paths and unfilled loops have no fill outline);
+        // booleans flatten to their result; strokes don't get outlined.
+        let mut part = match &n.kind {
+            NodeKind::Vector { network } => network.clone(),
+            _ => {
+                let Some((op, rule)) = (match &n.kind {
+                    NodeKind::Group | NodeKind::Frame | NodeKind::Component { .. } | NodeKind::Instance { .. } => {
+                        figcraft_render::subtree_outline(doc, n, 0)
+                    }
+                    _ => figcraft_render::node_outline(doc, n),
+                }) else {
+                    continue;
+                };
+                let mut part = VectorNetwork::from_path(&op);
+                if rule == figcraft_render::FillRule::EvenOdd {
+                    for r in &mut part.regions {
+                        r.winding = WindingRule::EvenOdd;
+                    }
+                }
+                part
+            }
         };
-        even |= rule == figcraft_render::FillRule::EvenOdd;
         // Into the common parent's space.
-        let w = doc.world_transform(*i);
-        op.apply_affine(pw.inverse() * w);
-        path.extend(op.elements().iter().copied());
+        let all: Vec<usize> = (0..part.vertices.len()).collect();
+        crate::vectoredit::ops::transform_vertices(&mut part, &all, pw.inverse() * doc.world_transform(*i));
+        let (nv, ns) = (net.vertices.len(), net.segments.len());
+        net.vertices.extend(part.vertices);
+        net.segments.extend(part.segments.into_iter().map(|s| Segment { a: s.a + nv, b: s.b + nv, ..s }));
+        net.regions.extend(
+            part.regions.into_iter().map(|r| Region { loops: r.loops.into_iter().map(|l| l.into_iter().map(|s| s + ns).collect()).collect(), ..r }),
+        );
     }
-    if path.elements().is_empty() {
+    let Some(bb) = net.bounds() else {
         return Err(EngineError::Disabled("vector.flatten".into(), "nothing to flatten".into()));
-    }
+    };
     let first = ids.first().and_then(|i| doc.node(*i)).cloned();
-    let bb = path.bounding_box();
-    path.apply_affine(Affine::translate((-bb.x0, -bb.y0)));
-    let mut net = VectorNetwork::from_path(&path);
-    for r in &mut net.regions {
-        r.winding = if even { WindingRule::EvenOdd } else { WindingRule::NonZero };
-    }
+    net.translate(-bb.x0, -bb.y0);
     let vid = doc.alloc_id();
     let name = first.as_ref().map(|f| f.name.clone()).unwrap_or_else(|| "Vector".into());
     let mut v = Node::new(vid, NodeKind::Vector { network: net }, name, bb.width(), bb.height());
@@ -405,7 +477,7 @@ fn outline_stroke(s: &mut Session, p: &Value) -> Result<Value> {
                 let f = doc.get_mut(fill_id)?;
                 f.strokes.clear();
             }
-            let r = wrap(s, &json!({"ids": [fill_id, vid], "name": n.name}), Wrap::Group)?;
+            let r = wrap(s, &json!({"ids": [fill_id, vid], "name": n.name}), "vector.outlineStroke", Wrap::Group)?;
             if let Some(g) = id_of(&r["id"]) {
                 out.push(g);
             }
@@ -452,7 +524,7 @@ fn layout_add(s: &mut Session, p: &Value) -> Result<Value> {
         ids
     } else {
         // Wrap non-frames in a new frame without a fill, then add auto layout to it.
-        let r = wrap(s, &json!({"ids": ids}), Wrap::Frame)?;
+        let r = wrap(s, &json!({"ids": ids}), "layout.add", Wrap::Frame)?;
         let fid = id_of(&r["id"]).ok_or_else(|| EngineError::Other("wrap failed".into()))?;
         let f = s.doc_mut()?.get_mut(fid)?;
         f.fills.clear();
@@ -477,11 +549,16 @@ fn layout_add(s: &mut Session, p: &Value) -> Result<Value> {
             let pb = doc.node(*b).map(|n| figcraft_geom::transform_rect_bbox(n.transform, n.local_rect())).unwrap_or_default();
             if vertical { pa.y0.total_cmp(&pb.y0) } else { pa.x0.total_cmp(&pb.x0) }
         });
+        let empty = doc.node(*f).is_some_and(|n| n.children.iter().filter_map(|c| doc.node(*c)).all(|c| !c.visible || c.child_layout.absolute));
         let n = doc.get_mut(*f)?;
         n.children = kids;
         n.layout = Some(al);
-        n.child_layout.sizing_h = Sizing::Hug;
-        n.child_layout.sizing_v = Sizing::Hug;
+        if !all_frames || !empty {
+            // A frame wrapped around the selection hugs it; an existing frame with no flow
+            // children keeps its size instead of collapsing to its padding.
+            n.child_layout.sizing_h = Sizing::Hug;
+            n.child_layout.sizing_v = Sizing::Hug;
+        }
     }
     s.set_selection(targets.clone());
     Ok(json!({"ids": targets}))
@@ -556,6 +633,10 @@ fn offset_path(s: &mut Session, p: &Value) -> Result<Value> {
     for i in req_targets("vector.offset", s, p)? {
         let doc = s.doc_mut()?;
         let n = doc.get(i)?.clone();
+        // A vector can't hold children: leave containers (frames, groups, instances) alone.
+        if !n.children.is_empty() {
+            continue;
+        }
         let Some((path, _)) = figcraft_render::node_outline(doc, &n) else { continue };
         let props = StrokeProps { weight: d.abs() * 2.0, join: StrokeJoin::Round, align: StrokeAlign::Center, ..Default::default() };
         let ring = figcraft_pathops::stroke_center(&path, d.abs() * 2.0, &props);

crates/engine/src/cmd/styles.rs

@@ -110,16 +110,26 @@ pub fn specs() -> Vec<CommandSpec> {
             ))
         }),
         spec!("variable.createCollection", "Create variable collection", "{name, modes? [names]}", true, |s, p| {
-            let name = req_string("variable.createCollection", p, "name")?;
-            let doc = s.doc_mut()?;
-            if doc.variables.collections.iter().any(|c| c.name == name) {
-                return Err(bad("variable.createCollection", format!("a collection named `{name}` already exists")));
+            let cmd = "variable.createCollection";
+            let name = req_string(cmd, p, "name")?.trim().to_string();
+            if name.is_empty() {
+                return Err(bad(cmd, "name can't be empty"));
             }
-            let id = doc.new_collection_id();
             let modes: Vec<String> = match get(p, "modes") {
-                Some(Value::Array(a)) => a.iter().filter_map(|m| m.as_str().map(str::to_string)).collect(),
+                Some(Value::Array(a)) => a.iter().filter_map(|m| m.as_str().map(|m| m.trim().to_string())).collect(),
                 _ => vec!["Mode 1".into()],
             };
+            if modes.is_empty() {
+                return Err(bad(cmd, "a collection needs at least one mode"));
+            }
+            if modes.iter().any(String::is_empty) {
+                return Err(bad(cmd, "mode names can't be empty"));
+            }
+            let doc = s.doc_mut()?;
+            if doc.variables.collections.iter().any(|c| c.name == name) {
+                return Err(bad(cmd, format!("a collection named `{name}` already exists")));
+            }
+            let id = doc.new_collection_id();
             let modes = modes.into_iter().enumerate().map(|(i, m)| Mode { id: format!("{id}/mode{}", i + 1), name: m }).collect();
             doc.variables.collections.push(Collection { id: id.clone(), name, modes, extends: None });
             Ok(json!({"id": id}))
@@ -458,10 +468,19 @@ fn bind_style(s: &mut Session, p: &Value) -> Result<Value> {
     match var {
         Some((_, kind)) if kind != want => return Err(bad(cmd, format!("`{field}` takes a {} variable, not a {} one", want.id(), kind.id()))),
         Some((id, _)) => {
+            if style.bound.get(&key) != Some(&id)
+                && let StyleKind::Paint { paints } = &mut style.kind
+            {
+                rebind_paint_alpha(paints, &mut [], &key, true);
+            }
             style.bound.insert(key, id);
         }
         None => {
-            style.bound.remove(&key);
+            if style.bound.remove(&key).is_some()
+                && let StyleKind::Paint { paints } = &mut style.kind
+            {
+                rebind_paint_alpha(paints, &mut [], &key, false);
+            }
         }
     }
     // The style takes its default-mode value, and each layer using it its own.
@@ -770,16 +789,41 @@ pub fn bind(s: &mut Session, p: &Value) -> Result<Value> {
         let n = doc.get_mut(i)?;
         match &vid {
             Some(v) => {
+                if n.bound.get(&field) != Some(v) {
+                    rebind_paint_alpha(&mut n.fills, &mut n.strokes, &field, true);
+                }
                 n.bound.insert(field.clone(), v.clone());
             }
             None => {
-                n.bound.remove(&field);
+                if n.bound.remove(&field).is_some() {
+                    rebind_paint_alpha(&mut n.fills, &mut n.strokes, &field, false);
+                }
             }
         }
     }
     ok()
 }
 
+/// A colour variable bound to a solid paint owns its whole colour, alpha included. Binding restarts
+/// the opacity (which holds the alpha a typed colour had, see `Paint::solid`) at 1, so the
+/// variable's alpha applies once; unbinding moves the colour's alpha back into the opacity, where a
+/// typed colour keeps it. An opacity set while bound multiplies on top and stays.
+pub(crate) fn rebind_paint_alpha(fills: &mut [Paint], strokes: &mut [Paint], field: &str, bind: bool) {
+    use super::lists::{BoundList, list_binding};
+    let Some((list, i, "color")) = list_binding(field) else { return };
+    let paints = match list {
+        BoundList::Fills => fills,
+        BoundList::Strokes => strokes,
+        _ => return,
+    };
+    if let Some(p) = paints.get_mut(i)
+        && let PaintKind::Solid { color } = &mut p.kind
+    {
+        p.opacity = if bind { 1.0 } else { p.opacity * color.a };
+        color.a = 1.0;
+    }
+}
+
 /// `variable.setMode`: choose a collection's mode on frames (the page when none are given).
 pub fn set_mode(s: &mut Session, p: &Value) -> Result<Value> {
     let cmd = "variable.setMode";
@@ -913,6 +957,167 @@ pub fn apply_bindings(doc: &mut Document) {
 
 /// [`apply_bindings`] for the layers `only` (every bound layer when `None`).
 pub fn apply_bindings_to(doc: &mut Document, only: Option<&std::collections::BTreeSet<NodeId>>) {
+    apply_bindings_matching(doc, only, |_| true);
+}
+
+/// The layers `ids` before an explicit edit, for [`detach_edited`] (only those with bindings).
+pub(crate) fn bound_before(doc: &Document, ids: &[NodeId]) -> Vec<std::sync::Arc<Node>> {
+    ids.iter().filter_map(|i| doc.node_arc(*i)).filter(|n| !n.bound.is_empty()).cloned().collect()
+}
+
+/// An explicit edit sticks: each layer's own bound field (not a list item's) whose value the edit
+/// changed drops its binding, which would otherwise write the variable's value back (#809).
+/// Compared by value, so keys written unchanged keep their bindings and fields moved along with
+/// another (proportions, min/max) lose theirs.
+pub(crate) fn detach_edited(doc: &mut Document, before: &[std::sync::Arc<Node>]) {
+    for old in before {
+        let Some(n) = doc.node(old.id) else { continue };
+        let edited: Vec<String> = n
+            .bound
+            .keys()
+            // A binding the edit itself made (`boundVariables`) stays.
+            .filter(|f| old.bound.get(*f) == n.bound.get(*f))
+            .filter(|f| super::lists::list_binding(f).is_none() && !f.starts_with(crate::components::PROP_BINDING))
+            .filter(|f| bound_field(old, f) != bound_field(n, f))
+            .cloned()
+            .collect();
+        if edited.is_empty() {
+            continue;
+        }
+        if let Ok(n) = doc.get_mut(old.id) {
+            for f in edited {
+                n.bound.remove(&f);
+            }
+        }
+    }
+}
+
+/// The stored value a layer-level binding writes, comparable (`None`: the layer has no such field).
+fn bound_field(n: &Node, field: &str) -> Option<String> {
+    let text = |f: &dyn Fn(&TextStyle) -> String| match &n.kind {
+        NodeKind::Text(t) => Some(std::iter::once(&t.style).chain(t.runs.iter().map(|r| &r.style)).map(f).collect::<Vec<_>>().join(",")),
+        _ => None,
+    };
+    let layout = n.layout.as_ref();
+    let cl = &n.child_layout;
+    let pad = |i: usize| layout.and_then(|l| l.padding.get(i).copied());
+    Some(match field {
+        "width" => format!("{}", n.width),
+        "height" => format!("{}", n.height),
+        "minWidth" => format!("{:?}", cl.min_w),
+        "maxWidth" => format!("{:?}", cl.max_w),
+        "minHeight" => format!("{:?}", cl.min_h),
+        "maxHeight" => format!("{:?}", cl.max_h),
+        "opacity" => format!("{}", n.opacity),
+        "visible" => format!("{}", n.visible),
+        "gap" | "columnGap" => format!("{:?}", layout.map(|l| l.gap)),
+        "crossGap" | "rowGap" => format!("{:?}", layout.map(|l| l.cross_gap)),
+        "padding" => format!("{:?}", layout.map(|l| l.padding)),
+        "paddingTop" => format!("{:?}", pad(0)),
+        "paddingRight" => format!("{:?}", pad(1)),
+        "paddingBottom" => format!("{:?}", pad(2)),
+        "paddingLeft" => format!("{:?}", pad(3)),
+        "paddingHorizontal" => format!("{:?}", (pad(1), pad(3))),
+        "paddingVertical" => format!("{:?}", (pad(0), pad(2))),
+        "cornerRadius" => format!("{:?}", n.corners.radii),
+        "topLeftRadius" => format!("{:?}", n.corners.radii.first()),
+        "topRightRadius" => format!("{:?}", n.corners.radii.get(1)),
+        "bottomRightRadius" => format!("{:?}", n.corners.radii.get(2)),
+        "bottomLeftRadius" => format!("{:?}", n.corners.radii.get(3)),
+        "strokeWeight" => format!("{:?}", (n.stroke.weight, n.stroke.sides)),
+        "strokeTopWeight" | "strokeRightWeight" | "strokeBottomWeight" | "strokeLeftWeight" => format!("{:?}", n.stroke.sides),
+        "arcStart" | "arcSweep" | "arcInner" => match &n.kind {
+            NodeKind::Ellipse { start, sweep, inner } => format!(
+                "{}",
+                if field == "arcStart" {
+                    start
+                } else if field == "arcSweep" {
+                    sweep
+                } else {
+                    inner
+                }
+            ),
+            _ => return None,
+        },
+        "characters" => match &n.kind {
+            NodeKind::Text(t) => t.characters.clone(),
+            _ => return None,
+        },
+        "paragraphSpacing" | "paragraphIndent" => match &n.kind {
+            NodeKind::Text(t) => format!("{}", if field == "paragraphSpacing" { t.paragraph_spacing } else { t.paragraph_indent }),
+            _ => return None,
+        },
+        "fontFamily" => text(&|s| s.font_family.clone())?,
+        "fontStyle" => text(&|s| s.font_style.clone())?,
+        "fontWeight" => text(&|s| s.weight().to_string())?,
+        "fontSize" => text(&|s| s.font_size.to_string())?,
+        "lineHeight" => text(&|s| format!("{:?}", s.line_height))?,
+        "letterSpacing" => text(&|s| format!("{:?}", s.letter_spacing))?,
+        // shortcut: other layer-level fields keep their binding on edits; add a reader when one is bound in practice.
+        _ => return None,
+    })
+}
+
+/// Imported files (`.fig`, REST) keep a solid paint's alpha in its opacity, a bound paint's too,
+/// while the bound colour brings its own alpha: take the variable's alpha back out of the opacity
+/// (styles' paints and layers') before the bindings are first resolved, so it applies once.
+pub(crate) fn unfold_imported_bound_alpha(doc: &mut Document) {
+    use super::lists::{BoundList, list_binding};
+    fn alphas(vars: &Variables, bound: &BTreeMap<String, VariableId>, modes: &BTreeMap<CollectionId, ModeId>) -> Vec<(BoundList, usize, f32)> {
+        let found = bound.iter().filter_map(|(field, var)| match (list_binding(field)?, vars.resolve(var, modes)?) {
+            ((list @ (BoundList::Fills | BoundList::Strokes), i, "color"), VariableValue::Color(c)) if c.a > 0.0 && c.a < 1.0 => Some((list, i, c.a)),
+            _ => None,
+        });
+        found.collect()
+    }
+    fn unfold(p: Option<&mut Paint>, a: f32) {
+        if let Some(p) = p
+            && matches!(p.kind, PaintKind::Solid { .. })
+        {
+            p.opacity = (p.opacity / a).min(1.0);
+        }
+    }
+    let pending = doc.take_dirty();
+    for i in 0..doc.styles.len() {
+        let found = doc.styles.get(i).map(|s| alphas(&doc.variables, &s.bound, &BTreeMap::new())).unwrap_or_default();
+        if let Some(StyleKind::Paint { paints }) = doc.styles.get_mut(i).filter(|_| !found.is_empty()).map(|s| &mut s.kind) {
+            for (_, j, a) in found {
+                unfold(paints.get_mut(j), a);
+            }
+        }
+    }
+    let ids: Vec<NodeId> = doc.nodes().filter(|n| !n.bound.is_empty()).map(|n| n.id).collect();
+    for id in ids {
+        let found = doc.node(id).map(|n| alphas(&doc.variables, &n.bound, &doc.modes_for(id))).unwrap_or_default();
+        if found.is_empty() {
+            continue;
+        }
+        let Ok(n) = doc.get_mut(id) else { continue };
+        for (list, j, a) in found {
+            unfold(if list == BoundList::Fills { n.fills.get_mut(j) } else { n.strokes.get_mut(j) }, a);
+        }
+    }
+    doc.take_dirty();
+    doc.mark_dirty(pending);
+}
+
+/// Settle imported paint colours before the document is first shown. Other bindings can affect
+/// layout or component structure, which must be resolved through the normal edit pipeline.
+pub(crate) fn apply_paint_bindings_on_load(doc: &mut Document) {
+    let pending = doc.take_dirty();
+    apply_bindings_matching(doc, None, |field| {
+        super::lists::list_binding(field).is_some_and(|(list, _, prop)| {
+            matches!(list, super::lists::BoundList::Fills | super::lists::BoundList::Strokes)
+                && (prop == "color" || super::lists::stop_binding(prop).is_some())
+        })
+    });
+    doc.take_dirty();
+    doc.mark_dirty(pending);
+}
+
+/// Re-apply the variable bindings whose field passes `include`, on the `only` nodes (every bound
+/// node when `None`). Auto layout fields wait while their node has no auto layout.
+fn apply_bindings_matching(doc: &mut Document, only: Option<&std::collections::BTreeSet<NodeId>>, include: impl Fn(&str) -> bool) {
     use super::lists::{BoundList, list_binding};
     if doc.variables.variables.is_empty() {
         return;
@@ -926,12 +1131,20 @@ pub fn apply_bindings_to(doc: &mut Document, only: Option<&std::collections::BTr
         let modes = doc.modes_for(id);
         let Some(n) = doc.node(id) else { continue };
         let binds = n.bound.clone();
+        let has_layout = n.layout.is_some();
         let mut sets = serde_json::Map::new();
         let mut effect_sets: Vec<(usize, String, VariableValue)> = Vec::new();
         let mut paint_sets: Vec<(bool, usize, Option<usize>, Color)> = Vec::new();
         let mut grid_sets: Vec<(usize, String, f64)> = Vec::new();
         let mut prop_sets: Vec<(String, VariableValue)> = Vec::new();
         for (field, var) in binds {
+            if !include(&field) {
+                continue;
+            }
+            // A binding never creates an auto layout: without one it waits for the next.
+            if !has_layout && super::props::LAYOUT_KEYS.contains(&field.as_str()) {
+                continue;
+            }
             let Some(val) = doc.variables.resolve(&var, &modes) else { continue };
             // One list item's value: a paint's colour, an effect's or a layout grid's field.
             if let Some((list, i, prop)) = list_binding(&field) {
@@ -1083,7 +1296,6 @@ pub fn document_colors(doc: &Document, page: NodeId) -> Vec<(Color, usize)> {
         stack.extend(n.children.iter().copied());
         for paint in n.fills.iter().chain(n.strokes.iter()).filter(|p| p.visible) {
             if let Some(c) = paint.solid_color() {
-                let c = c.with_alpha(c.a * paint.opacity);
                 counts.entry(c.to_rgba8()).or_insert((c, 0)).1 += 1;
             }
         }

crates/engine/src/cmd/text.rs

@@ -18,6 +18,7 @@ fn style(s: &mut Session, p: &Value, f: impl Fn(&mut TextStyle)) -> Result<Value
         let ds = s.ds_mut()?;
         let before = ds.doc.clone();
         let doc = ds.doc_mut();
+        let bound = super::styles::bound_before(doc, &[id]);
         if let NodeKind::Text(t) = &mut doc.get_mut(id)?.kind {
             if a == b {
                 t.restyle(0, t.char_count(), &f);
@@ -25,19 +26,21 @@ fn style(s: &mut Session, p: &Value, f: impl Fn(&mut TextStyle)) -> Result<Value
                 t.restyle(a, b, &f);
             }
         }
+        super::styles::detach_edited(doc, &bound);
         crate::normalize(doc, &before);
         return ok();
     }
     let ids = req_targets("text", s, p)?;
     let doc = s.doc_mut()?;
-    for i in ids {
-        for d in doc.subtree(i) {
-            if let Some(NodeKind::Text(t)) = doc.node_mut(d).map(|n| &mut n.kind) {
-                let n = t.char_count();
-                t.restyle(0, n, &f);
-            }
+    let ids: Vec<NodeId> = ids.into_iter().flat_map(|i| doc.subtree(i)).collect();
+    let before = super::styles::bound_before(doc, &ids);
+    for d in ids {
+        if let Some(NodeKind::Text(t)) = doc.node_mut(d).map(|n| &mut n.kind) {
+            let n = t.char_count();
+            t.restyle(0, n, &f);
         }
     }
+    super::styles::detach_edited(doc, &before);
     ok()
 }
 
@@ -332,7 +335,7 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "text.preview",
             "Preview text change",
-            "{command: style.apply|library.applyStyle|text.setVariations|text.style, params}  shows what the command would do on the canvas without an undo step (a hovered text style or named instance, a dragged axis slider), in place of an earlier preview; text.endPreview or any other command ends it, so running the command for real commits it as one undo step",
+            "{command: style.apply|library.applyStyle|text.setVariations|text.style, params}  shows what the command would do on the canvas without an undo step (a hovered font family or style, text style or named instance, a dragged axis slider), in place of an earlier preview; text.endPreview or any other command ends it, so running the command for real commits it as one undo step",
             false,
             |s, p| {
                 let c = req_string("text.preview", p, "command")?;
@@ -348,11 +351,13 @@ pub fn specs() -> Vec<CommandSpec> {
             let c = string(p, "characters").or_else(|| string(p, "text")).ok_or_else(|| bad("text.set", "`characters` required"))?;
             let ids = req_targets("text.set", s, p)?;
             let doc = s.doc_mut()?;
+            let before = super::styles::bound_before(doc, &ids);
             for i in ids {
                 let mut m = Map::new();
                 m.insert("characters".into(), json!(c));
                 super::props::apply("text.set", doc, i, &m)?;
             }
+            super::styles::detach_edited(doc, &before);
             ok()
         }),
         spec!(
@@ -364,6 +369,7 @@ pub fn specs() -> Vec<CommandSpec> {
                 let ids = req_targets("text.style", s, p)?;
                 let m = p.as_object().cloned().unwrap_or_default();
                 let doc = s.doc_mut()?;
+                let before = super::styles::bound_before(doc, &ids);
                 for i in ids {
                     let n = doc.get_mut(i)?;
                     let NodeKind::Text(t) = &mut n.kind else { return Err(bad("text.style", format!("{i} is not text"))) };
@@ -377,6 +383,7 @@ pub fn specs() -> Vec<CommandSpec> {
                         super::props::apply_text_style("text.style", t, a, b, k, v)?;
                     }
                 }
+                super::styles::detach_edited(doc, &before);
                 ok()
             }
         ),
@@ -474,5 +481,40 @@ pub fn specs() -> Vec<CommandSpec> {
                 })
             }
         ),
+        spec!(
+            "text.rescanFonts",
+            "Rescan installed fonts",
+            "{}  walks the system font folders again, for fonts installed while the app runs; the open document's auto-sizing text in the families that gained faces (new ones, or styles installed since) fits them (text.refit) → {added: [families that were unknown], refitted: [ids]}",
+            true,
+            |s, _| {
+                let rescan = figcraft_text::rescan_system_fonts();
+                let refitted = crate::fonts::refit_open(s, None, Some(&rescan.changed));
+                Ok(json!({"added": rescan.added, "refitted": refitted}))
+            }
+        ),
+        spec!(
+            "text.loadFont",
+            "Load font file",
+            "{path | data (base64)}  adds a font file (.ttf, .otf, .ttc, .otc; every face of a collection) to this session's fonts without installing it; the open document's auto-sizing text in its families fits it (text.refit) → {families, refitted: [ids]}",
+            true,
+            |s, p| {
+                let cmd = "text.loadFont";
+                let bytes = if let Some(b64) = string(p, "data") {
+                    use base64::Engine as _;
+                    let b64 = b64.split_once(',').map(|(_, d)| d.to_string()).unwrap_or(b64);
+                    base64::engine::general_purpose::STANDARD.decode(b64.trim()).map_err(|e| bad(cmd, format!("`data`: {e}")))?
+                } else if let Some(path) = string(p, "path") {
+                    super::file::read_capped(&path, figcraft_text::fontdb::MAX_FONT_FILE)?
+                } else {
+                    return Err(bad(cmd, "pass `path` or `data` (base64)"));
+                };
+                let families = figcraft_text::load_font_bytes(bytes);
+                if families.is_empty() {
+                    return Err(bad(cmd, "not a font file"));
+                }
+                let refitted = crate::fonts::refit_open(s, None, Some(&families));
+                Ok(json!({"families": families, "refitted": refitted}))
+            }
+        ),
     ]
 }

crates/engine/src/cmd/variables.rs

@@ -288,7 +288,11 @@ pub(crate) fn forget_variables(doc: &mut Document, gone: &BTreeSet<VariableId>)
     doc.variables.variables.retain(|v| !gone.contains(&v.id));
     let users: Vec<NodeId> = doc.nodes().filter(|n| n.bound.values().any(|v| gone.contains(v))).map(|n| n.id).collect();
     for id in users {
-        doc.get_mut(id)?.bound.retain(|_, v| !gone.contains(v));
+        let n = doc.get_mut(id)?;
+        for (field, _) in n.bound.iter().filter(|(_, v)| gone.contains(*v)) {
+            super::styles::rebind_paint_alpha(&mut n.fills, &mut n.strokes, field, false);
+        }
+        n.bound.retain(|_, v| !gone.contains(v));
     }
     Ok(())
 }

crates/engine/src/cmd/variables_io.rs

@@ -25,7 +25,7 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "variable.import",
             "Import variables",
-            "{variables (the local variables JSON, as variable.export writes it: an object, JSON text or a path)}  collections join this file's collection of the same name (values by mode name; new modes and variables are added, a variable of another type is skipped), others are added  → {collections (added), variables (added), updated, warnings}",
+            "{variables (the local variables JSON, as variable.export writes it: an object, JSON text or a path; `variableCollections` and `variables` under `meta` or at the top level)}  collections join this file's collection of the same name (values by mode name; new modes and variables are added, a variable of another type is skipped), others are added  → {collections (added), variables (added), updated, warnings (also when it holds no variables, or fewer than its collections list)}",
             true,
             import
         ),

crates/engine/src/cmd/view.rs

@@ -19,30 +19,58 @@ fn flag(s: &mut Session, p: &Value, f: fn(&mut ViewState) -> &mut bool) -> Resul
     Ok(json!({"on": *slot}))
 }
 
+/// One of a view's on/off settings.
+type Slot = fn(&mut ViewState) -> &mut bool;
+
+/// The View menu's on/off toggles (Pixel preview, with its scale, has its own command), and
+/// whether the preferences keep each: files opened or made later start with the kept ones. Outline
+/// modes and the sRGB soft-proof stay with their file, so a new file never opens in one.
+const TOGGLES: &[(&str, Slot, bool)] = &[
+    ("view.pixelGrid", |v| &mut v.pixel_grid, true),
+    ("view.layoutGrids", |v| &mut v.layout_grids, true),
+    ("view.rulers", |v| &mut v.rulers, true),
+    ("view.slices", |v| &mut v.show_slices, true),
+    ("view.comments", |v| &mut v.comments, true),
+    ("view.multiplayerCursors", |v| &mut v.multiplayer_cursors, true),
+    ("view.outlines", |v| &mut v.outlines, false),
+    ("view.outlinesSelection", |v| &mut v.outlines_selection, false),
+    ("view.outlinesHiddenLayers", |v| &mut v.outline_hidden, true),
+    ("view.outlinesObjectBounds", |v| &mut v.outline_bounds, true),
+    ("view.maskOutlines", |v| &mut v.mask_outlines, true),
+    ("view.frameOutlines", |v| &mut v.frame_outlines, true),
+    ("view.proofSrgb", |v| &mut v.proof_srgb, false),
+    ("view.snapGeometry", |v| &mut v.snap_geometry, true),
+    ("view.snapObjects", |v| &mut v.snap_objects, true),
+    ("view.snapPixel", |v| &mut v.snap_pixel, true),
+];
+
+/// View toggle `id`: the file's view changes, and the preferences remember a kept one.
+fn toggle(s: &mut Session, p: &Value, id: &str) -> Result<Value> {
+    let Some(&(_, f, keep)) = TOGGLES.iter().find(|(k, ..)| *k == id) else { return Err(bad(id, "not a View toggle")) };
+    let r = flag(s, p, f)?;
+    if keep && let Some(on) = r.get("on").and_then(Value::as_bool) {
+        s.prefs.view.insert(id.to_string(), on);
+    }
+    Ok(r)
+}
+
+/// Set `v`'s View toggles to the ones the preferences keep (the others stay as they are).
+pub(crate) fn apply_kept(prefs: &crate::Prefs, v: &mut ViewState) {
+    for (id, f, _) in TOGGLES.iter().filter(|t| t.2) {
+        if let Some(on) = prefs.view.get(*id) {
+            *f(v) = *on;
+        }
+    }
+}
+
 /// Whether the View menu's toggle `id` is on (the menus show a check mark); `None` for a command
 /// that isn't one.
 pub fn checked(s: &Session, id: &str) -> Option<bool> {
-    let v = &s.ds().ok()?.view;
-    Some(match id {
-        "view.pixelGrid" => v.pixel_grid,
-        "view.layoutGrids" => v.layout_grids,
-        "view.rulers" => v.rulers,
-        "view.slices" => v.show_slices,
-        "view.comments" => v.comments,
-        "view.multiplayerCursors" => v.multiplayer_cursors,
-        "view.outlines" => v.outlines,
-        "view.outlinesSelection" => v.outlines_selection,
-        "view.outlinesHiddenLayers" => v.outline_hidden,
-        "view.outlinesObjectBounds" => v.outline_bounds,
-        "view.maskOutlines" => v.mask_outlines,
-        "view.pixelPreview" => v.pixel_preview,
-        "view.frameOutlines" => v.frame_outlines,
-        "view.proofSrgb" => v.proof_srgb,
-        "view.snapGeometry" => v.snap_geometry,
-        "view.snapObjects" => v.snap_objects,
-        "view.snapPixel" => v.snap_pixel,
-        _ => return None,
-    })
+    let mut v = s.ds().ok()?.view.clone();
+    if id == "view.pixelPreview" {
+        return Some(v.pixel_preview);
+    }
+    TOGGLES.iter().find(|(k, ..)| *k == id).map(|(_, f, _)| *f(&mut v))
 }
 
 /// Pixel preview: toggles, or turns on at a resolution of 1x or 2x.
@@ -235,46 +263,46 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!("view.nextFrame", "Zoom to next frame", "{}", false, |s, _| zoom_frame(s, 1)),
         spec!("view.prevPage", "Previous page", "{}", false, |s, _| page_step(s, -1)),
         spec!("view.nextPage", "Next page", "{}", false, |s, _| page_step(s, 1)),
-        spec!("view.pixelGrid", "Pixel grid", "{on?}", false, |s, p| flag(s, p, |v| &mut v.pixel_grid)),
-        spec!("view.layoutGrids", "Layout grids", "{on?}", false, |s, p| flag(s, p, |v| &mut v.layout_grids)),
-        spec!("view.rulers", "Rulers", "{on?}", false, |s, p| flag(s, p, |v| &mut v.rulers)),
-        spec!("view.slices", "Slices", "{on?}", false, |s, p| flag(s, p, |v| &mut v.show_slices)),
-        spec!("view.comments", "Comments", "{on?}", false, |s, p| flag(s, p, |v| &mut v.comments)),
+        spec!("view.pixelGrid", "Pixel grid", "{on?}", false, |s, p| toggle(s, p, "view.pixelGrid")),
+        spec!("view.layoutGrids", "Layout grids", "{on?}", false, |s, p| toggle(s, p, "view.layoutGrids")),
+        spec!("view.rulers", "Rulers", "{on?}", false, |s, p| toggle(s, p, "view.rulers")),
+        spec!("view.slices", "Slices", "{on?}", false, |s, p| toggle(s, p, "view.slices")),
+        spec!("view.comments", "Comments", "{on?}", false, |s, p| toggle(s, p, "view.comments")),
         spec!("view.multiplayerCursors", "Multiplayer cursors", "{on?}  others' cursors in a live session", false, |s, p| {
-            flag(s, p, |v| &mut v.multiplayer_cursors)
+            toggle(s, p, "view.multiplayerCursors")
         }),
         spec!("view.pan", "Pan the view", "{dx, dy (arrow-key steps, e.g. 1 or -1), big? (ten times as far, like Shift)}", false, pan),
-        spec!("view.outlines", "Outlines", "{on?}", false, |s, p| flag(s, p, |v| &mut v.outlines)),
+        spec!("view.outlines", "Outlines", "{on?}", false, |s, p| toggle(s, p, "view.outlines")),
         spec!("view.outlinesSelection", "Outlines for selection", "{on?}  outline mode for the selected layers only", false, |s, p| {
-            flag(s, p, |v| &mut v.outlines_selection)
+            toggle(s, p, "view.outlinesSelection")
         }),
         spec!(
             "view.outlinesHiddenLayers",
             "Include hidden layers in outlines",
             "{on?}  outline mode (and outlines for the selection) outlines hidden layers too; they can be clicked there",
             false,
-            |s, p| { flag(s, p, |v| &mut v.outline_hidden) }
+            |s, p| { toggle(s, p, "view.outlinesHiddenLayers") }
         ),
         spec!(
             "view.outlinesObjectBounds",
             "Include object bounds in outlines",
             "{on?}  outline mode also draws each layer's box (groups, text, vectors); a click on a box's edge picks its layer",
             false,
-            |s, p| { flag(s, p, |v| &mut v.outline_bounds) }
+            |s, p| { toggle(s, p, "view.outlinesObjectBounds") }
         ),
-        spec!("view.maskOutlines", "Mask outlines", "{on?}", false, |s, p| flag(s, p, |v| &mut v.mask_outlines)),
+        spec!("view.maskOutlines", "Mask outlines", "{on?}", false, |s, p| toggle(s, p, "view.maskOutlines")),
         spec!("view.pixelPreview", "Pixel preview", "{on?, scale? (1|2: rendered pixels per page pixel; turns it on)}", false, pixel_preview),
-        spec!("view.frameOutlines", "Frame outlines", "{on?}", false, |s, p| flag(s, p, |v| &mut v.frame_outlines)),
+        spec!("view.frameOutlines", "Frame outlines", "{on?}", false, |s, p| toggle(s, p, "view.frameOutlines")),
         spec!(
             "view.proofSrgb",
             "Soft-proof sRGB",
             "{on?}  mark the colours of a Display P3 file that sRGB screens and files can't show",
             false,
-            |s, p| { flag(s, p, |v| &mut v.proof_srgb) }
+            |s, p| { toggle(s, p, "view.proofSrgb") }
         ),
-        spec!("view.snapGeometry", "Snap to geometry", "{on?}", false, |s, p| flag(s, p, |v| &mut v.snap_geometry)),
-        spec!("view.snapObjects", "Snap to objects", "{on?}", false, |s, p| flag(s, p, |v| &mut v.snap_objects)),
-        spec!("view.snapPixel", "Snap to pixel grid", "{on?}", false, |s, p| flag(s, p, |v| &mut v.snap_pixel)),
+        spec!("view.snapGeometry", "Snap to geometry", "{on?}", false, |s, p| toggle(s, p, "view.snapGeometry")),
+        spec!("view.snapObjects", "Snap to objects", "{on?}", false, |s, p| toggle(s, p, "view.snapObjects")),
+        spec!("view.snapPixel", "Snap to pixel grid", "{on?}", false, |s, p| toggle(s, p, "view.snapPixel")),
         spec!("view.toggleUi", "Show/Hide UI", "{on?}", false, |s, p| flag(s, p, |v| &mut v.ui_hidden)),
         spec!("view.fullscreen", "Full screen", "{on?}  the window fills the screen (the desktop app; a no-op headless)", false, |s, p| {
             s.request_ui("window.fullscreen", json!({"on": boolean(p, "on")}));
@@ -342,7 +370,25 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!("pref.showDimensions", "Show dimensions on objects", "{on?}", false, |s, p| pref(s, p, |x| &mut x.show_dimensions)),
         spec!("pref.numberKeysOpacity", "Use number keys for opacity", "{on?}", false, |s, p| pref(s, p, |x| &mut x.number_keys_opacity)),
         spec!("pref.reduceMotion", "Reduce motion", "{on?}", false, |s, p| pref(s, p, |x| &mut x.reduce_motion)),
+        spec!(
+            "pref.uiScale",
+            "Interface size",
+            "{scale?: a size from 0.75 to 3 relative to the system's display scale, 1 being the system's own size, so 1.25 is 125 %, not 125 (outside the range it stops at the nearest end; \"auto\" is 1; omit: just read it)} → {scale}: how large the whole interface is drawn; the canvas zoom is separate",
+            false,
+            |s, p| {
+                match get(p, "scale") {
+                    None => {}
+                    Some(Value::String(v)) if v.trim().eq_ignore_ascii_case("auto") => s.prefs.ui_scale = 1.0,
+                    Some(_) => {
+                        let scale = req_num("pref.uiScale", p, "scale")?;
+                        s.prefs.ui_scale = crate::clamp_ui_scale(scale).ok_or_else(|| bad("pref.uiScale", "`scale` must be a finite number"))?;
+                    }
+                }
+                Ok(json!({"scale": s.prefs.ui_scale}))
+            }
+        ),
         spec!("pref.autoSave", "Save files automatically", "{on?}", false, |s, p| pref(s, p, |x| &mut x.auto_save)),
+        spec!("pref.startOnHome", "Start on the Home screen", "{on?}", false, |s, p| pref(s, p, |x| &mut x.start_on_home)),
         spec!("pref.nudge", "Nudge amount", "{small?, big?}", false, |s, p| {
             s.prefs.nudge_small = num(p, "small").unwrap_or(s.prefs.nudge_small).clamp(0.01, 1000.0);
             s.prefs.nudge_big = num(p, "big").unwrap_or(s.prefs.nudge_big).clamp(0.01, 10000.0);
@@ -381,7 +427,7 @@ pub fn specs() -> Vec<CommandSpec> {
         spec!(
             "pref.language",
             "Interface language",
-            "{language: system|en|cs|ru|es|es-419|fr|de|pt-BR|ja|ko|zh-Hans|…; else English}",
+            "{language: system|en|cs|ru|es|es-419|fr|de|pt-BR|ja|ka|ko|zh-Hans|…; else English}",
             false,
             |s, p| {
                 let lang = req_string("pref.language", p, "language")?;
@@ -494,3 +540,24 @@ pub fn specs() -> Vec<CommandSpec> {
 
 #[allow(dead_code)]
 fn unused(_: NodeId) {}
+
+#[cfg(test)]
+mod start_on_home_tests {
+    use serde_json::json;
+
+    use crate::Session;
+
+    #[test]
+    fn start_on_home_is_a_preference_that_persists() {
+        let mut s = Session::new();
+        assert!(!s.prefs.start_on_home);
+        assert_eq!(s.execute("pref.startOnHome", &json!({})).unwrap()["on"], true);
+        assert!(s.prefs.start_on_home);
+        // Saved with the other preferences and read back; older settings files without it read as off.
+        let saved: crate::Prefs = serde_json::from_value(serde_json::to_value(&s.prefs).unwrap()).unwrap();
+        assert!(saved.start_on_home);
+        assert_eq!(s.execute("pref.startOnHome", &json!({"on": false})).unwrap()["on"], false);
+        let old: crate::Prefs = serde_json::from_value(json!({"theme": "dark"})).unwrap();
+        assert!(!old.start_on_home);
+    }
+}

crates/engine/src/codegen.rs

@@ -256,7 +256,26 @@ fn stroke_color(n: &Node) -> Option<Color> {
     if !n.has_visible_stroke() {
         return None;
     }
-    n.strokes.iter().filter(|p| p.visible).find_map(|p| p.solid_color().map(|c| c.with_alpha(c.a * p.opacity)))
+    n.strokes.iter().filter(|p| p.visible).find_map(|p| p.solid_color())
+}
+
+/// The CSS borders a solid stroke makes: one `border`, or with individual stroke sides a border
+/// on each side that has a weight.
+fn css_borders(doc: &Document, n: &Node, t: &mut Tokens) -> Vec<(String, String)> {
+    let Some(c) = stroke_color(n) else { return Vec::new() };
+    let Some(sides) = n.stroke.sides else {
+        let weight = tok(doc, n, &["strokeWeight"], format!("{}px", num(n.stroke.weight)), t);
+        return vec![("border".into(), format!("{weight} solid {}", tok(doc, n, &["stroke"], c.to_css(), t)))];
+    };
+    let color = tok(doc, n, &["stroke"], c.to_css(), t);
+    let named = ["top", "right", "bottom", "left"].into_iter().zip(crate::cmd::props::STROKE_SIDES);
+    named
+        .zip(sides)
+        .filter(|(_, weight)| *weight > 0.0)
+        .map(|((side, field), weight)| {
+            (format!("border-{side}"), format!("{} solid {color}", tok(doc, n, &[field], format!("{}px", num(weight)), t)))
+        })
+        .collect()
 }
 
 fn drop_shadow(n: &Node) -> Option<&Shadow> {
@@ -452,9 +471,8 @@ pub(crate) fn css_decls(doc: &Document, n: &Node, t: &mut Tokens, hug: (bool, bo
             PaintKind::Pattern(_) => put("background", "url(pattern.png) repeat".into()),
         }
     }
-    if let Some(c) = stroke_color(n) {
-        let weight = tok(doc, n, &["strokeWeight"], px(n.stroke.weight), t);
-        put("border", format!("{weight} solid {}", tok(doc, n, &["stroke"], c.to_css(), t)));
+    for (key, value) in css_borders(doc, n, t) {
+        put(&key, value);
     }
     let shadows: Vec<String> = n
         .effects
@@ -858,11 +876,16 @@ pub(crate) fn swift(ctx: &Ctx, id: NodeId, depth: usize, out: &mut String, extra
     swift_layer(ctx, n, depth, out, extra);
 }
 
+/// A layer name safe for a single-line `//` comment: line breaks become spaces.
+fn one_line(name: &str) -> String {
+    name.replace(['\n', '\r', '\u{85}', '\u{2028}', '\u{2029}'], " ")
+}
+
 fn swift_layer(ctx: &Ctx, n: &Node, depth: usize, out: &mut String, extra: &[String]) {
     let doc = ctx.doc;
     let pad = indent(depth);
     if ctx.too_deep(depth) {
-        out.push_str(&format!("{pad}// {} …\n", n.name));
+        out.push_str(&format!("{pad}// {} …\n", one_line(&n.name)));
         return;
     }
     // Nested instances are calls; an instance swap parameter is a view.
@@ -1035,7 +1058,7 @@ fn compose_layer(ctx: &Ctx, n: &Node, depth: usize, out: &mut String) {
     let doc = ctx.doc;
     let pad = indent(depth);
     if ctx.too_deep(depth) {
-        out.push_str(&format!("{pad}// {} …\n", n.name));
+        out.push_str(&format!("{pad}// {} …\n", one_line(&n.name)));
         return;
     }
     // Nested instances are calls; an instance swap parameter is a composable.
@@ -1168,4 +1191,26 @@ mod tests {
         assert!(kt.contains("Modifier.offset(7.dp, 9.dp)"));
         assert!(code_for(doc, NodeId(999_999), CodeLang::Css).is_empty());
     }
+
+    #[test]
+    fn too_deep_placeholder_keeps_a_multiline_layer_name_in_the_comment() {
+        let mut s = Session::new();
+        let name = "deep\nevil()\r\u{2028}more()";
+        let mut parent = id_of(&s.execute("frame.create", &json!({"x": 0, "y": 0, "width": 50, "height": 50, "name": name})).unwrap()["id"]).unwrap();
+        let root = parent;
+        for _ in 0..16 {
+            parent =
+                id_of(&s.execute("frame.create", &json!({"x": 1, "y": 1, "width": 40, "height": 40, "parent": parent, "name": name})).unwrap()["id"])
+                    .unwrap();
+        }
+        let doc = s.doc().unwrap();
+        for lang in [CodeLang::SwiftUi, CodeLang::Compose] {
+            let code = code_for(doc, root, lang);
+            assert!(code.contains("// deep evil()  more() …\n"), "{code}");
+            for line in code.lines() {
+                let t = line.trim_start();
+                assert!(!t.starts_with("evil()") && !t.starts_with("more()"), "layer name leaked as code:\n{code}");
+            }
+        }
+    }
 }

crates/engine/src/components.rs

@@ -11,12 +11,12 @@
 //! Override groups: `fills`, `strokes`, `effects`, `opacity`, `visible`, `name`, `corners`,
 //! `characters`, `textStyle` (font, size, spacing, resizing, …), `padding`, `gap` and `alignment`
 //! (of auto layout: its direction and other settings are the main's), `grids`, `exports`,
-//! `interactions`, `component` (a swapped nested instance), `props` (property values of a nested
-//! instance) and `slot` (a slot holding the instance's own content). An instance's own export
-//! settings and interactions are its own, like its place. `size` and `position` overrides of
-//! layers inside an instance are still read and kept, but new ones are refused
-//! ([`check_override_edit`]): those layers take their geometry, constraints and resizing from the
-//! main; the instance itself resizes.
+//! `interactions`, `size` and `resizing` (hug, fill or fixed, with min and max sizes) of layers
+//! inside an instance, `component` (a swapped nested instance), `props` (property values of a
+//! nested instance) and `slot` (a slot holding the instance's own content). An instance's own
+//! export settings, interactions and resizing are its own, like its place. `position`
+//! overrides of layers inside an instance are still read and kept, but new ones are refused
+//! ([`check_override_edit`]): those layers take their place and constraints from the main.
 //!
 //! Switching variants keeps an override where the layer's name path matches and the two variants
 //! agreed on that property (text layers keep all of theirs); swapping from the Assets panel keeps
@@ -58,6 +58,7 @@ pub const OVERRIDE_GROUPS: &[&str] = &[
     "exports",
     "interactions",
     "size",
+    "resizing",
     "position",
     "component",
     "props",
@@ -284,11 +285,28 @@ pub fn create_instance_at(doc: &mut Document, component: NodeId, parent: NodeId,
     root.dev_resources.clear();
     // The main's interactions play on its instances in prototypes; the instance's own start empty.
     root.interactions.clear();
+    // So do the variable modes the main sets (see `Document::inherited_modes`).
+    root.var_modes.clear();
     doc.insert(root, parent, index)?;
     sync_instance(doc, id);
     Ok(id)
 }
 
+/// Copy `id` within its own file under `parent` (at `index`), keeping its local transform. A file
+/// has one main per component, so a main component's copy is an instance of it; a variant copied
+/// into its set stays a new variant, and every other layer is deep-copied.
+pub fn copy_in_file(doc: &mut Document, id: NodeId, parent: NodeId, index: Option<usize>) -> Result<NodeId, DocError> {
+    let n = doc.get(id)?;
+    let in_set = doc.node(parent).is_some_and(|p| matches!(p.kind, NodeKind::ComponentSet { .. }));
+    if !matches!(n.kind, NodeKind::Component { .. }) || in_set {
+        return doc.duplicate_into(id, parent, index);
+    }
+    let transform = n.transform;
+    let instance = create_instance_at(doc, id, parent, 0.0, 0.0, index)?;
+    doc.get_mut(instance)?.transform = transform;
+    Ok(instance)
+}
+
 /// Which part of the carried overrides to apply.
 #[derive(Clone, Copy, PartialEq)]
 enum Carry {
@@ -388,11 +406,14 @@ pub(crate) fn copy_group(from: &Node, to: &mut Node, g: &str) {
         "size" => {
             to.width = from.width;
             to.height = from.height;
-            to.child_layout = from.child_layout.clone();
             if let (NodeKind::Text(a), NodeKind::Text(b)) = (&from.kind, &mut to.kind) {
                 b.auto_resize = a.auto_resize;
             }
         }
+        "resizing" => {
+            let (a, b) = (&from.child_layout, &mut to.child_layout);
+            (b.sizing_h, b.sizing_v, b.min_w, b.max_w, b.min_h, b.max_h) = (a.sizing_h, a.sizing_v, a.min_w, a.max_w, a.min_h, a.max_h);
+        }
         "position" => to.transform = from.transform,
         "component" => {
             if let (NodeKind::Instance { component: a, .. }, NodeKind::Instance { component: b, .. }) = (&from.kind, &mut to.kind) {
@@ -472,11 +493,11 @@ fn apply_prop(doc: &Document, n: &mut Node, field: &str, val: &Value) {
             }
         }
         "characters" => {
-            if let (NodeKind::Text(t), Some(sv)) = (&mut n.kind, val.as_str())
+            if let (NodeKind::Text(t), Some(sv)) = (&mut n.kind, val.as_str().map(crate::cmd::props::normalize_line_endings))
                 && t.characters != sv
             {
                 let len = t.char_count();
-                t.replace_range(0, len, sv);
+                t.replace_range(0, len, &sv);
             }
         }
         "mainComponent" => {
@@ -773,6 +794,15 @@ fn sync_instance_depth(doc: &mut Document, inst: NodeId, depth: usize, spare: BT
     for s in &src {
         let Some(nid) = map.get(s).copied() else { continue };
         let Some(o) = old.get(&nid) else { continue };
+        // A frame that kept the size its own resizing gave it: its layers (copied at their main
+        // layers' places) follow their constraints from its main layer's size.
+        if o.overrides.contains("resizing")
+            && !o.overrides.contains("size")
+            && doc.node(nid).is_some_and(|n| n.kind.is_frame_like() && n.layout.is_none())
+            && let Some((mw, mh)) = doc.node(*s).map(|m| (m.width, m.height))
+        {
+            figcraft_layout::apply_constraints(doc, nid, mw, mh);
+        }
         if !o.overrides.contains("size") && !o.overrides.contains("position") {
             continue;
         }
@@ -985,6 +1015,9 @@ pub fn diff_groups(a: &Node, b: &Node) -> Vec<&'static str> {
     if (a.width - b.width).abs() > 1e-6 || (a.height - b.height).abs() > 1e-6 {
         out.push("size");
     }
+    if resizing(a) != resizing(b) {
+        out.push("resizing");
+    }
     if a.transform != b.transform {
         out.push("position");
     }
@@ -1027,6 +1060,12 @@ pub fn diff_groups(a: &Node, b: &Node) -> Vec<&'static str> {
     out
 }
 
+/// The `resizing` group of a layer: how it sizes on each axis, and its min and max sizes.
+fn resizing(n: &Node) -> (Sizing, Sizing, [Option<f64>; 4]) {
+    let c = &n.child_layout;
+    (c.sizing_h, c.sizing_v, [c.min_w, c.max_w, c.min_h, c.max_h])
+}
+
 /// Whether two texts differ in anything but their characters (the `textStyle` group).
 fn text_style_differs(x: &TextData, y: &TextData) -> bool {
     x.style != y.style
@@ -1107,9 +1146,10 @@ pub fn sync_after_edit(doc: &mut Document, before: &Document, changed: &[NodeId]
         }
         let raw = diff_groups(b, n);
         let mut groups = raw.clone();
-        // An instance's own place, export settings and interactions are its own, not overrides.
+        // An instance's own place, resizing, export settings and interactions are its own, not
+        // overrides.
         if top_root {
-            groups.retain(|g| !matches!(*g, "component" | "props" | "position" | "exports" | "interactions"));
+            groups.retain(|g| !matches!(*g, "component" | "props" | "position" | "resizing" | "exports" | "interactions"));
         }
         if groups.iter().any(|g| matches!(*g, "size" | "position")) {
             groups.retain(|g| !matches!(*g, "size" | "position") || !geometry_derived(doc, before, id, g));
@@ -1414,7 +1454,7 @@ fn patch_structure(doc: &mut Document, before: &Document, seeds: &[NodeId]) -> b
 fn child_follows_main(doc: &Document, parent: NodeId, absolute: bool) -> bool {
     let Some(p) = doc.node(parent) else { return false };
     let constrains = p.layout.is_none() || absolute;
-    let resized = p.overrides.contains("size")
+    let resized = sized_own(p)
         || match &p.kind {
             NodeKind::Instance { component, .. } => {
                 doc.node(*component).is_none_or(|m| (m.width - p.width).abs() > 1e-9 || (m.height - p.height).abs() > 1e-9)
@@ -1475,7 +1515,7 @@ fn patch_copies(doc: &mut Document, seeds: &[(NodeId, Vec<&'static str>)]) -> bo
             let gs: Vec<&'static str> = groups
                 .iter()
                 .copied()
-                .filter(|g| !cn.overrides.contains(*g) && !(root && matches!(*g, "visible" | "name" | "position" | "exports" | "interactions")))
+                .filter(|g| !(cn.overrides.contains(*g) || root && matches!(*g, "visible" | "name" | "position" | "exports" | "interactions")))
                 .collect();
             if gs.is_empty() {
                 continue;
@@ -1518,7 +1558,7 @@ fn follows_main_geometry(doc: &Document, id: NodeId) -> bool {
     chain.windows(2).all(|w| {
         let (Some(below), Some(a)) = (w.first().and_then(|i| doc.node(*i)), w.get(1).and_then(|i| doc.node(*i))) else { return false };
         let constrains = a.layout.is_none() || below.child_layout.absolute;
-        if a.overrides.contains("size") && constrains {
+        if sized_own(a) && constrains {
             return false;
         }
         match &a.kind {
@@ -1530,6 +1570,12 @@ fn follows_main_geometry(doc: &Document, id: NodeId) -> bool {
     })
 }
 
+/// Whether a layer inside an instance overrides its size or resizing: it may not have its main
+/// layer's size, so the layers in it can't take their main layers' places as they are.
+fn sized_own(n: &Node) -> bool {
+    n.overrides.contains("size") || n.overrides.contains("resizing")
+}
+
 /// Rebuild every instance of `comps` (and of the components that hold those instances, and so on
 /// outwards), each outermost instance once, inner components first.
 fn rebuild_instances(doc: &mut Document, comps: &BTreeSet<NodeId>) {
@@ -1665,10 +1711,9 @@ pub fn check_override_edit(before: &Document, after: &Document) -> Result<(), St
 
 /// What about layer `id` an edit from `before` to `after` changed that only its main can: the
 /// auto layout of an instance or a layer in one but its padding, gap and alignment, or the
-/// position (rotation too), size, constraints or resizing of a layer inside an instance (the
-/// instance itself resizes, and its layers follow; text whose box follows its content still
-/// does). `None` when the edit is fine, also when the main changed the same way in this edit (a
-/// library update).
+/// position (rotation too), constraints or place in auto layout (absolute, grid cell) of a layer
+/// inside an instance (its size and resizing are overrides). `None` when the edit is fine, also
+/// when the main changed the same way in this edit (a library update).
 pub fn refused_override(before: &Document, after: &Document, id: NodeId) -> Option<&'static str> {
     let (n, b) = (after.node(id)?, before.node(id)?);
     if after.is_remote(id) || n.source != b.source || owning_instance(before, id).is_none() || owning_instance(after, id).is_none() {
@@ -1684,8 +1729,12 @@ pub fn refused_override(before: &Document, after: &Document, id: NodeId) -> Opti
             l
         })
     };
-    let size = |x: &Node| (x.width, x.height);
-    let resized = |x: &Node, y: &Node| (x.width - y.width).abs() > 1e-6 || (x.height - y.height).abs() > 1e-6;
+    // Child layout settings other than the resizing ones.
+    let placing = |x: &Node| {
+        let mut c = x.child_layout.clone();
+        (c.sizing_h, c.sizing_v, c.min_w, c.max_w, c.min_h, c.max_h) = (Sizing::Fixed, Sizing::Fixed, None, None, None, None);
+        c
+    };
     if mode(n) != mode(b) && mode(ma) == mode(mb) {
         return Some("The auto layout direction");
     }
@@ -1698,18 +1747,174 @@ pub fn refused_override(before: &Document, after: &Document, id: NodeId) -> Opti
     if n.transform != b.transform && ma.transform == mb.transform && !geometry_derived(after, before, id, "position") {
         return Some("A layer's position");
     }
-    if resized(n, b) && size(ma) == size(mb) && !geometry_derived(after, before, id, "size") {
-        return Some("A layer's size");
-    }
     if n.constraints != b.constraints && ma.constraints == mb.constraints {
         return Some("A layer's constraints");
     }
-    if n.child_layout != b.child_layout && ma.child_layout == mb.child_layout {
-        return Some("A layer's resizing");
+    if placing(n) != placing(b) && placing(ma) == placing(mb) {
+        return Some("A layer's place in auto layout");
     }
     None
 }
 
+/// Bounded source and parent lookups while a rebase reads an unchanged document.
+struct RebaseSources<'a> {
+    doc: &'a Document,
+    chains: BTreeMap<NodeId, Option<Vec<NodeId>>>,
+    parents: BTreeMap<(NodeId, NodeId), Option<bool>>,
+    main_changes: BTreeMap<NodeId, bool>,
+}
+
+impl<'a> RebaseSources<'a> {
+    const PARENTS: usize = 512;
+    const CACHE: usize = 8192;
+
+    fn new(doc: &'a Document) -> Self {
+        Self { doc, chains: BTreeMap::new(), parents: BTreeMap::new(), main_changes: BTreeMap::new() }
+    }
+
+    fn chain(&mut self, source: NodeId) -> Option<Vec<NodeId>> {
+        if let Some(chain) = self.chains.get(&source) {
+            return chain.clone();
+        }
+        let read = || {
+            let mut chain = Vec::new();
+            let mut seen = BTreeSet::new();
+            let mut current = Some(source);
+            for _ in 0..MAX_DEPTH {
+                let Some(id) = current else { return Some(chain) };
+                if !seen.insert(id) {
+                    return None;
+                }
+                let n = self.doc.node(id)?;
+                chain.push(id);
+                current = n.source;
+            }
+            current.is_none().then_some(chain)
+        };
+        let chain = read();
+        if self.chains.len() < Self::CACHE {
+            self.chains.insert(source, chain.clone());
+        }
+        chain
+    }
+
+    /// Validate the complete parent chain, even if `main` was found before a cycle.
+    fn in_main(&mut self, id: NodeId, main: NodeId) -> Option<bool> {
+        if let Some(found) = self.parents.get(&(id, main)) {
+            return *found;
+        }
+        let read = || {
+            let mut current = Some(id);
+            let mut seen = BTreeSet::new();
+            let mut found = false;
+            for _ in 0..Self::PARENTS {
+                let Some(id) = current else { return Some(found) };
+                if !seen.insert(id) {
+                    return None;
+                }
+                found |= id == main;
+                current = self.doc.node(id)?.parent;
+            }
+            current.is_none().then_some(found)
+        };
+        let found = read();
+        if self.parents.len() < Self::CACHE {
+            self.parents.insert((id, main), found);
+        }
+        found
+    }
+
+    fn member(&mut self, source: NodeId, main: NodeId, target: NodeId) -> Option<NodeId> {
+        let chain = self.chain(source)?;
+        if chain.contains(&target) {
+            return None;
+        }
+        let mut member = None;
+        for id in chain {
+            if self.in_main(id, main)? && id != main && member.is_none() {
+                member = Some(id);
+            }
+        }
+        member
+    }
+
+    /// Nearest enclosing instances and their current mains. Slots with own content end scope.
+    fn owners(&self, id: NodeId) -> Option<Vec<(NodeId, NodeId)>> {
+        let mut owners = Vec::new();
+        let mut current = self.doc.node(id)?.parent;
+        let mut seen = BTreeSet::from([id]);
+        for _ in 0..Self::PARENTS {
+            let Some(id) = current else { return Some(owners) };
+            if !seen.insert(id) {
+                return None;
+            }
+            let n = self.doc.node(id)?;
+            if holds_content(n) {
+                return Some(owners);
+            }
+            if let NodeKind::Instance { component, .. } = &n.kind {
+                owners.push((id, *component));
+            }
+            current = n.parent;
+        }
+        current.is_none().then_some(owners)
+    }
+
+    fn contextual(&mut self, source: NodeId, owners: &[(NodeId, NodeId)]) -> bool {
+        owners.iter().any(|(_, main)| self.in_main(source, *main) == Some(true) && source != *main)
+    }
+
+    /// A contextual child belongs to the same placed slot as its enclosing instance.
+    fn valid(&mut self, source: NodeId, target: NodeId, owners: &[(NodeId, NodeId)]) -> bool {
+        let Some((owner, main)) = owners.first() else { return false };
+        if self.member(source, *main, target).is_none() {
+            return false;
+        }
+        if self.in_main(source, *main) == Some(true) {
+            return true;
+        }
+        let Some(source_owner) = self.doc.node(*owner).and_then(|n| n.source) else { return false };
+        matches!(self.doc.node(source_owner).map(|n| &n.kind), Some(NodeKind::Instance { component, .. }) if component == main)
+            && self.owners(source).and_then(|owners| owners.first().copied()).is_some_and(|(id, _)| id == source_owner)
+    }
+
+    fn placed(&mut self, id: NodeId, owners: &[(NodeId, NodeId)]) -> Option<NodeId> {
+        let source = self.doc.node(id)?.source?;
+        if !matches!(self.doc.node(source)?.kind, NodeKind::Instance { .. } | NodeKind::Frame)
+            || !self.valid(source, id, owners)
+            || !self.contextual(source, owners)
+        {
+            return None;
+        }
+        Some(source)
+    }
+
+    fn beneath_swap(&mut self, owners: &[(NodeId, NodeId)], stop: NodeId) -> bool {
+        for (index, (id, main)) in owners.iter().enumerate() {
+            if *id == stop {
+                break;
+            }
+            let changed = if let Some(changed) = self.main_changes.get(id) {
+                *changed
+            } else {
+                let changed = self.placed(*id, &owners[index + 1..]).is_some_and(|source| match self.doc.node(source).map(|n| &n.kind) {
+                    Some(NodeKind::Instance { component, .. }) => component != main,
+                    Some(NodeKind::Frame) => true,
+                    _ => false,
+                });
+                if self.main_changes.len() < Self::CACHE {
+                    self.main_changes.insert(*id, changed);
+                }
+                changed
+            };
+            if changed {
+                return true;
+            }
+        }
+        false
+    }
+}
+
 /// Re-derive `source` links and overrides of instance `inst` against its own main by comparing
 /// values (after detaching an outer instance, restoring a main, or copying a nested instance out):
 /// the look is kept exactly. Values a component property sets aren't overrides.
@@ -1722,22 +1927,28 @@ pub fn rebase_instance(doc: &mut Document, inst: NodeId) {
         diff_groups(a, b).into_iter().filter(|g| !matches!(*g, "size" | "position")).map(str::to_string).collect()
     };
     let mut updates = Vec::new();
+    let mut sources = RebaseSources::new(doc);
+    let root_owners = sources.owners(inst).unwrap_or_default();
+    let placed_source = sources.placed(inst, &root_owners);
+    let mut contexts = vec![(inst, component)];
+    contexts.extend_from_slice(&root_owners);
     for (id, path) in &mine {
         let Some(n) = doc.node(*id) else { continue };
-        // Follow the source chain into the main first (exact), then fall back to the name path.
-        let mut main = None;
-        let mut cur = n.source;
-        for _ in 0..MAX_DEPTH {
-            let Some(c) = cur else { break };
-            if c != component && doc.contains(c) && doc.is_ancestor(component, c) {
-                main = Some(c);
-                break;
-            }
-            cur = doc.node(c).and_then(|x| x.source);
+        let owners = sources.owners(*id).unwrap_or_default();
+        let nearest_main = owners.first().map(|(_, main)| *main);
+        let valid_source = n.source.filter(|source| sources.valid(*source, *id, &owners));
+        let mut main = valid_source.and_then(|source| sources.member(source, component, *id));
+        // A swapped or Frame-to-Instance subtree is compared to its current main by the inner
+        // rebase. An outer name path must not rebind those children to the old expanded copies.
+        if main.is_none() && valid_source.is_some() && sources.beneath_swap(&owners, inst) {
+            updates.push((*id, valid_source, n.overrides.clone()));
+            continue;
         }
-        let main = main.or_else(|| theirs.get(path).copied());
+        main = main
+            .or_else(|| theirs.get(path).copied().filter(|source| nearest_main.is_some_and(|scope| sources.member(*source, scope, *id).is_some())));
+        let source = valid_source.filter(|source| sources.contextual(*source, &contexts)).filter(|_| main.is_some()).or(main);
         let mut overrides: BTreeSet<String> = n.overrides.iter().filter(|g| !matches!(g.as_str(), "component" | "props")).cloned().collect();
-        if let Some(m) = main.and_then(|m| doc.node(m)) {
+        if let Some(m) = source.and_then(|source| doc.node(source)) {
             let mut bound: Vec<&str> = m.prop_refs.keys().map(|f| field_group(f)).collect();
             bound.extend(variable_groups(n, m));
             overrides.extend(value_groups(m, n).into_iter().filter(|g| !bound.contains(&g.as_str())));
@@ -1745,36 +1956,53 @@ pub fn rebase_instance(doc: &mut Document, inst: NodeId) {
                 overrides.insert("component".into());
             }
         }
-        updates.push((*id, main, overrides));
+        updates.push((*id, source, overrides));
     }
+    // A placed nested root compares to its actual slot. A detached root compares to its own main.
+    let root_base = placed_source.or_else(|| {
+        let chain = sources.chain(component)?;
+        (!chain.contains(&inst) && sources.in_main(component, inst) == Some(false)).then_some(component)
+    });
+    let root_groups = match (root_base.and_then(|source| doc.node(source)), doc.node(inst)) {
+        (Some(m), Some(n)) => {
+            let from_variables = variable_groups(n, m);
+            let mut groups: Vec<String> = value_groups(m, n)
+                .into_iter()
+                .filter(|g| !matches!(g.as_str(), "name" | "exports" | "interactions") && !from_variables.contains(&g.as_str()))
+                .filter(|g| placed_source.is_some() || g != "resizing")
+                .collect();
+            let named = if placed_source.is_some() { n.name != m.name } else { n.name != default_instance_name(doc, component) };
+            if named {
+                groups.push("name".into());
+            }
+            if placed_source.is_some()
+                && matches!((&m.kind, &n.kind), (NodeKind::Instance { component: a, .. }, NodeKind::Instance { component: b, .. }) if a != b)
+            {
+                groups.push("component".into());
+            }
+            groups
+        }
+        _ => Vec::new(),
+    };
+    drop(sources);
     for (id, main, overrides) in updates {
         if let Some(n) = doc.node_mut(id) {
             n.source = main;
             n.overrides = if main.is_some() { overrides } else { BTreeSet::new() };
         }
     }
-    let root_groups = match (doc.node(component), doc.node(inst)) {
-        (Some(m), Some(n)) => {
-            let from_variables = variable_groups(n, m);
-            let mut groups: Vec<String> = value_groups(m, n)
-                .into_iter()
-                .filter(|g| !matches!(g.as_str(), "name" | "exports" | "interactions") && !from_variables.contains(&g.as_str()))
-                .collect();
-            // A layer name of its own (a nested instance renamed in its old main) stays.
-            if n.name != default_instance_name(doc, component) {
-                groups.push("name".into());
-            }
-            groups
-        }
-        _ => Vec::new(),
-    };
     if let Some(n) = doc.node_mut(inst) {
-        n.source = Some(component);
-        n.overrides.retain(|g| !matches!(g.as_str(), "component" | "props" | "position"));
+        n.source = root_base;
+        // A top-level instance's resizing is its own (a nested one's overrides its main layer's).
+        n.overrides.retain(|g| !matches!(g.as_str(), "component" | "props" | "position") && (placed_source.is_some() || g != "resizing"));
         n.overrides.extend(root_groups);
     }
 }
 
+#[cfg(test)]
+#[path = "components_rebase_source_tests.rs"]
+mod rebase_source_tests;
+
 /// A set's default variant: the one in its top-left corner (nearest to it, then the top-most, then
 /// the left-most).
 pub fn default_variant(doc: &Document, set: NodeId) -> Option<NodeId> {

crates/engine/src/components_behaviour_tests.rs

@@ -82,6 +82,179 @@ fn text(n: &Node) -> &TextData {
     n.kind.text().unwrap()
 }
 
+#[test]
+fn copying_a_main_component_pastes_a_linked_instance() {
+    for command in ["edit.paste", "edit.pasteOver", "edit.pasteReplace"] {
+        let mut s = Session::new();
+        let k = kit(&mut s);
+        ex(&mut s, "select.set", json!({"ids": [k.card]}));
+        ex(&mut s, "edit.copy", json!({}));
+        if command != "edit.paste" {
+            ex(&mut s, "select.set", json!({"ids": [k.inst]}));
+        }
+        let before = undo_len(&s);
+        let pasted = crate::params::id_of(&ex(&mut s, command, json!({}))["ids"][0]).unwrap();
+        assert_eq!(component_of(&s, pasted), k.card, "{command}");
+        assert_eq!(node(&s, pasted).parent, Some(s.page().unwrap()));
+        assert_eq!(node(&s, pasted).source, Some(k.card));
+        assert_eq!(undo_len(&s), before + 1);
+        ex(&mut s, "edit.undo", json!({}));
+        assert!(s.doc().unwrap().node(pasted).is_none());
+        ex(&mut s, "edit.redo", json!({}));
+        assert_eq!(component_of(&s, pasted), k.card);
+        ex(&mut s, "node.set", json!({"id": k.title, "props": {"characters": "Updated"}}));
+        assert_eq!(chars(&s, copy_of(&s, pasted, k.title)), "Updated");
+        healthy(&s);
+    }
+}
+
+#[test]
+fn copying_a_variant_pastes_an_instance_but_copying_its_set_keeps_the_components() {
+    let mut s = Session::new();
+    let (set, _, hover) = button_set(&mut s);
+    ex(&mut s, "select.set", json!({"ids": [hover]}));
+    ex(&mut s, "edit.copy", json!({}));
+    let pasted = crate::params::id_of(&ex(&mut s, "edit.paste", json!({}))["ids"][0]).unwrap();
+    assert_eq!(component_of(&s, pasted), hover);
+    assert_eq!(node(&s, pasted).name, node(&s, set).name);
+    let NodeKind::Instance { props, .. } = &node(&s, pasted).kind else { panic!("pasted variant is not an instance") };
+    assert_eq!(chars(&s, layer(&s, pasted, "Label").unwrap()), "Hover");
+    assert_eq!(props["Show dot"], true);
+    assert_eq!(node(&s, pasted).parent, Some(s.page().unwrap()));
+
+    ex(&mut s, "select.set", json!({"ids": [set]}));
+    ex(&mut s, "edit.copy", json!({}));
+    let copied_set = crate::params::id_of(&ex(&mut s, "edit.paste", json!({}))["ids"][0]).unwrap();
+    assert!(matches!(node(&s, copied_set).kind, NodeKind::ComponentSet { .. }));
+    assert_eq!(node(&s, copied_set).parent, Some(s.page().unwrap()));
+    assert_eq!(kids(&s, copied_set).len(), 2);
+    for variant in kids(&s, copied_set) {
+        assert!(matches!(node(&s, variant).kind, NodeKind::Component { .. }));
+        assert!(!kids(&s, set).contains(&variant));
+    }
+    healthy(&s);
+}
+
+#[test]
+fn cut_components_and_components_copied_to_another_file_remain_components() {
+    for (copy, undo_cut, new_file) in [("edit.cut", false, false), ("edit.cut", true, false), ("edit.copy", false, true)] {
+        let mut s = Session::new();
+        let k = kit(&mut s);
+        ex(&mut s, copy, json!({"ids": [k.card]}));
+        if undo_cut {
+            ex(&mut s, "edit.undo", json!({}));
+        }
+        if new_file {
+            ex(&mut s, "file.new", json!({}));
+        }
+        let page = s.page().unwrap();
+        let pasted = crate::params::id_of(&ex(&mut s, "edit.paste", json!({"parent": page}))["ids"][0]).unwrap();
+        assert!(matches!(node(&s, pasted).kind, NodeKind::Component { .. }), "{copy}, undo={undo_cut}, new_file={new_file}");
+        assert_eq!(kids(&s, pasted).len(), 3);
+        healthy(&s);
+    }
+}
+
+#[test]
+fn copying_a_component_does_not_link_to_an_id_reused_after_undo() {
+    let mut s = Session::new();
+    let frame = idv(&ex(&mut s, "frame.create", json!({"width": 120, "height": 60, "name": "Copied main"})));
+    let main = idv(&ex(&mut s, "component.create", json!({"ids": [frame]})));
+    ex(&mut s, "edit.copy", json!({"ids": [main]}));
+    s.undo().unwrap();
+    s.undo().unwrap();
+    let other = idv(&ex(&mut s, "frame.create", json!({"width": 300, "height": 200, "name": "Unrelated main"})));
+    ex(&mut s, "component.create", json!({"ids": [other]}));
+    assert_eq!(other, main, "undo makes the original id available again");
+    let page = s.page().unwrap();
+    let pasted = crate::params::id_of(&ex(&mut s, "edit.paste", json!({"parent": page}))["ids"][0]).unwrap();
+    assert_eq!(node(&s, pasted).name, "Copied main");
+    assert_eq!((node(&s, pasted).width, node(&s, pasted).height), (120.0, 60.0));
+    assert!(matches!(node(&s, pasted).kind, NodeKind::Component { .. }));
+    healthy(&s);
+}
+
+#[test]
+fn pasted_component_instances_keep_the_copied_transform_in_the_target_frame() {
+    let mut s = Session::new();
+    let k = kit(&mut s);
+    ex(&mut s, "node.set", json!({"id": k.card, "props": {"rotation": 30}}));
+    let original = s.doc().unwrap().world_transform(k.card);
+    let frame = idv(&ex(&mut s, "frame.create", json!({"x": -100, "y": -100, "width": 1000, "height": 1000})));
+    ex(&mut s, "edit.copy", json!({"ids": [k.card]}));
+    let pasted = crate::params::id_of(&ex(&mut s, "edit.paste", json!({"parent": frame}))["ids"][0]).unwrap();
+    assert_eq!(component_of(&s, pasted), k.card);
+    for (actual, expected) in s.doc().unwrap().world_transform(pasted).as_coeffs().into_iter().zip(original.as_coeffs()) {
+        assert!((actual - expected).abs() < 1e-9);
+    }
+    assert_eq!(node(&s, pasted).parent, Some(frame));
+    let before = s.doc().unwrap().clone();
+    assert!(s.execute("edit.paste", &json!({"parent": k.card})).is_err());
+    assert_eq!(s.doc().unwrap(), &before, "pasting into the main is refused atomically");
+    healthy(&s);
+}
+
+#[test]
+fn duplicating_a_main_component_makes_a_linked_instance() {
+    for rename in [false, true] {
+        let mut s = Session::new();
+        ex(&mut s, "pref.renameDuplicates", json!({"on": rename}));
+        let k = kit(&mut s);
+        let rect = idv(&ex(&mut s, "shape.rectangle", json!({"x": 0, "y": 300, "width": 50, "height": 50, "props": {"name": "Box"}})));
+        let before = s.doc().unwrap().clone();
+        let out = ex(&mut s, "edit.duplicate", json!({"ids": [k.card, rect]}));
+        let ids: Vec<NodeId> = out["ids"].as_array().unwrap().iter().filter_map(crate::params::id_of).collect();
+        assert_eq!(s.selection(), ids);
+        let copy = *ids.iter().find(|i| matches!(node(&s, **i).kind, NodeKind::Instance { .. })).expect("the main's copy is an instance");
+        assert_eq!(component_of(&s, copy), k.card);
+        assert_eq!(node(&s, copy).name, "Card", "instances keep their default name (rename={rename})");
+        assert_eq!(node(&s, copy).parent, Some(s.page().unwrap()));
+        let (b, c) = (s.doc().unwrap().world_bounds(k.card).unwrap(), s.doc().unwrap().world_bounds(copy).unwrap());
+        assert_eq!((c.x0, c.y0, c.width(), c.height()), (b.x1 + 100.0, b.y0, b.width(), b.height()), "a top-level frame's offset");
+        let other = *ids.iter().find(|i| **i != copy).unwrap();
+        assert!(matches!(node(&s, other).kind, NodeKind::Rectangle), "other layers are still copied");
+        ex(&mut s, "node.set", json!({"id": k.title, "props": {"characters": "Updated"}}));
+        assert_eq!(chars(&s, copy_of(&s, copy, k.title)), "Updated", "the instance follows its main");
+        ex(&mut s, "edit.undo", json!({}));
+        ex(&mut s, "edit.undo", json!({}));
+        assert_eq!(*s.doc().unwrap(), before, "undo restores exactly");
+        healthy(&s);
+    }
+}
+
+#[test]
+fn alt_dragging_a_main_component_copies_an_instance() {
+    use crate::tools::{PointerEvent, PointerKind};
+    let mut s = Session::new();
+    let f = idv(&ex(&mut s, "frame.create", json!({"x": 0, "y": 0, "width": 100, "height": 100, "name": "Tile"})));
+    let main = idv(&ex(&mut s, "component.create", json!({"ids": [f]})));
+    let ev = |kind, x| PointerEvent { alt: true, ..PointerEvent::at(kind, x, 50.0, 1.0) };
+    s.pointer(&ev(PointerKind::Down, 50.0)).unwrap();
+    s.pointer(&ev(PointerKind::Move, 150.0)).unwrap();
+    s.pointer(&ev(PointerKind::Move, 250.0)).unwrap();
+    s.pointer(&ev(PointerKind::Up, 250.0)).unwrap();
+    let [copy] = s.selection()[..] else { panic!("one copy selected") };
+    assert_eq!(component_of(&s, copy), main);
+    assert_eq!(s.doc().unwrap().world_bounds(copy).unwrap().x0, 200.0);
+    assert_eq!(s.doc().unwrap().world_bounds(main).unwrap().x0, 0.0, "the main stays");
+    healthy(&s);
+}
+
+#[test]
+fn duplicating_a_variant_adds_a_variant_to_its_set() {
+    let mut s = Session::new();
+    let (set, _, hover) = button_set(&mut s);
+    let copy = crate::params::id_of(&ex(&mut s, "edit.duplicate", json!({"ids": [hover]}))["ids"][0]).unwrap();
+    assert!(matches!(node(&s, copy).kind, NodeKind::Component { .. }));
+    assert_eq!(node(&s, copy).parent, Some(set));
+    assert_eq!(kids(&s, set).len(), 3);
+    // A whole set duplicates as a new set of variants.
+    let set2 = crate::params::id_of(&ex(&mut s, "edit.duplicate", json!({"ids": [set]}))["ids"][0]).unwrap();
+    assert!(matches!(node(&s, set2).kind, NodeKind::ComponentSet { .. }));
+    assert!(kids(&s, set2).iter().all(|v| matches!(node(&s, *v).kind, NodeKind::Component { .. })));
+    healthy(&s);
+}
+
 #[test]
 fn overridable_properties_stay_through_main_edits_and_reset() {
     // (what, layer, group, override on the instance, the same property edited on the main, read,
@@ -316,14 +489,6 @@ fn what_instances_cannot_override_is_refused() {
         ("nudge a layer", "transform.nudge", json!({"ids": ["$"], "dx": 1, "dy": 0}), Layer::Bg, "position"),
         ("rotate a layer", "node.set", json!({"id": "$", "props": {"rotation": 15}}), Layer::Bg, "position and rotation come with the layer's place"),
         ("flip a layer", "object.flipH", json!({"ids": ["$"]}), Layer::Bg, "position"),
-        (
-            "resize a layer",
-            "node.set",
-            json!({"id": "$", "props": {"width": 50}}),
-            Layer::Bg,
-            "not among the overridable properties; the instance resizes",
-        ),
-        ("resize a text box", "node.set", json!({"id": "$", "props": {"width": 150}}), Layer::Title, "\"the bounds of any text layers\""),
         (
             "change constraints",
             "node.set",
@@ -331,13 +496,6 @@ fn what_instances_cannot_override_is_refused() {
             Layer::Bg,
             "\"any constraints applied to the layers\"",
         ),
-        (
-            "make a layer fill its auto layout",
-            "node.set",
-            json!({"id": "$", "props": {"sizingH": "fill"}}),
-            Layer::Chip,
-            "resizing comes with the layer's size",
-        ),
         (
             "take a layer out of auto layout",
             "node.set",
@@ -721,3 +879,35 @@ fn auto_layout_instances_follow_their_main() {
     assert_eq!(node(&s, i).child_layout.min_w, Some(80.0));
     healthy(&s);
 }
+
+#[test]
+fn a_new_component_set_is_named_after_its_first_variant() {
+    // "Button/State=Hover" groups under "Button": the set takes the path before the last '/'.
+    // A bare property name ("State=Default, Size=Small") names no set, and neither does an empty
+    // name: the set gets the next numbered default, like a new component. A plain name is kept.
+    let rows = [
+        ("Button/State=Hover", "Button", "slash-prefixed: the path before the last '/'"),
+        ("Icons/Arrow/Dir=Up", "Icons/Arrow", "nested path: everything before the last '/'"),
+        ("State=Default, Size=Small", "Component 1", "bare prop=value: not \"State\""),
+        ("", "Component 1", "empty name: the numbered default"),
+    ];
+    for (name, expected, why) in rows {
+        let mut s = Session::new();
+        let f = idv(&ex(&mut s, "frame.create", json!({"x": 0, "y": 0, "width": 40, "height": 20})));
+        ex(&mut s, "node.set", json!({"id": f, "props": {"name": name}}));
+        let c = idv(&ex(&mut s, "component.create", json!({"ids": [f]})));
+        assert_eq!(node(&s, c).name, name, "{why}: the variant keeps its name");
+        let set = idv(&ex(&mut s, "component.combineVariants", json!({"ids": [c]})));
+        assert_eq!(node(&s, set).name, expected, "{why}");
+        healthy(&s);
+    }
+
+    // Add variant on a lone component (a variant property on it) wraps it in a set named after it.
+    let mut s = Session::new();
+    let f = idv(&ex(&mut s, "frame.create", json!({"x": 0, "y": 0, "width": 40, "height": 20, "name": "Button"})));
+    let c = idv(&ex(&mut s, "component.create", json!({"ids": [f]})));
+    let set = idv(&ex(&mut s, "component.addProperty", json!({"id": c, "name": "State", "type": "variant"})));
+    assert_eq!(node(&s, set).name, "Button");
+    assert_eq!(node(&s, c).name, "State=Default");
+    healthy(&s);
+}

crates/engine/src/components_rebase_source_tests.rs

@@ -0,0 +1,244 @@
+//! Contextual import sources survive rebasing; detached and swapped subtrees use their current mains.
+
+use super::*;
+
+fn add(doc: &mut Document, parent: NodeId, kind: NodeKind, name: &str) -> NodeId {
+    doc.create(parent, kind, name, 0.0, 0.0, 20.0, 20.0).unwrap()
+}
+
+fn component(doc: &mut Document, parent: NodeId, name: &str) -> NodeId {
+    add(doc, parent, NodeKind::Component { description: String::new(), props: BTreeMap::new() }, name)
+}
+
+fn mirror(doc: &mut Document, source: NodeId, parent: NodeId) -> NodeId {
+    let mut n = doc.node(source).unwrap().clone();
+    let children = std::mem::take(&mut n.children);
+    n.id = doc.alloc_id();
+    n.parent = None;
+    n.source = Some(source);
+    let id = n.id;
+    doc.insert(n, parent, None).unwrap();
+    for child in children {
+        mirror(doc, child, id);
+    }
+    id
+}
+
+fn instance(doc: &mut Document, main: NodeId, parent: NodeId, name: &str) -> NodeId {
+    let mut n = doc.node(main).unwrap().clone();
+    let children = std::mem::take(&mut n.children);
+    n.id = doc.alloc_id();
+    n.kind = NodeKind::Instance { component: main, props: BTreeMap::new() };
+    n.name = name.into();
+    n.parent = None;
+    n.source = None;
+    let id = n.id;
+    doc.insert(n, parent, None).unwrap();
+    for child in children {
+        mirror(doc, child, id);
+    }
+    id
+}
+
+struct Scene {
+    doc: Document,
+    inner: NodeId,
+    base: NodeId,
+    slot: NodeId,
+    context: NodeId,
+    root: NodeId,
+    nested: NodeId,
+    child: NodeId,
+}
+
+fn scene() -> Scene {
+    let mut doc = Document::new("Source context");
+    let page = doc.first_page().unwrap();
+    let inner = component(&mut doc, page, "Inner");
+    let base = add(&mut doc, inner, NodeKind::Rectangle, "Body");
+    doc.node_mut(base).unwrap().transform = Affine::translate((2.0, 0.0));
+    let outer = component(&mut doc, page, "Outer");
+    let slot = instance(&mut doc, inner, outer, "Nested");
+    doc.node_mut(slot).unwrap().source = Some(inner);
+    let context = doc.node(slot).unwrap().children[0];
+    doc.node_mut(context).unwrap().transform = Affine::translate((3.0, 0.0));
+    doc.node_mut(context).unwrap().opacity = 0.3;
+    let root = instance(&mut doc, outer, page, "Outer copy");
+    let nested = doc.node(root).unwrap().children[0];
+    let child = doc.node(nested).unwrap().children[0];
+    doc.node_mut(child).unwrap().transform = Affine::translate((2.0, 0.0));
+    doc.node_mut(child).unwrap().opacity = 0.2;
+    Scene { doc, inner, base, slot, context, root, nested, child }
+}
+
+fn both(s: &mut Scene) {
+    rebase_instance(&mut s.doc, s.nested);
+    rebase_instance(&mut s.doc, s.root);
+}
+
+#[test]
+fn rebase_default_only_sources_promote_to_the_actual_outer_context() {
+    let mut s = scene();
+    s.doc.node_mut(s.nested).unwrap().source = None;
+    s.doc.node_mut(s.child).unwrap().source = None;
+    both(&mut s);
+    assert_eq!(s.doc.node(s.nested).unwrap().source, Some(s.slot));
+    assert_eq!(s.doc.node(s.child).unwrap().source, Some(s.context));
+}
+
+#[test]
+fn rebase_rejects_a_context_source_from_another_nested_slot() {
+    let mut s = scene();
+    let outer = s.doc.node(s.slot).unwrap().parent.unwrap();
+    let sibling = instance(&mut s.doc, s.inner, outer, "Other nested slot");
+    s.doc.node_mut(sibling).unwrap().source = Some(s.inner);
+    let sibling_child = s.doc.node(sibling).unwrap().children[0];
+    mirror(&mut s.doc, sibling, s.root);
+    s.doc.node_mut(s.child).unwrap().source = Some(sibling_child);
+    both(&mut s);
+    assert_eq!(s.doc.node(s.nested).unwrap().source, Some(s.slot));
+    assert_eq!(s.doc.node(s.child).unwrap().source, Some(s.context));
+    assert_eq!(s.doc.node(sibling_child).unwrap().transform.translation().x, 2.0);
+    assert_eq!(s.doc.node(s.context).unwrap().transform.translation().x, 3.0);
+}
+
+#[test]
+fn rebase_does_not_mark_inherited_context_values_as_local_overrides() {
+    let mut s = scene();
+    s.doc.node_mut(s.child).unwrap().opacity = 0.3;
+    both(&mut s);
+    assert_eq!(s.doc.node(s.child).unwrap().source, Some(s.context));
+    assert!(!s.doc.node(s.child).unwrap().overrides.contains("opacity"));
+}
+
+#[test]
+fn rebase_preserves_multilevel_context_without_shortening_source_chains() {
+    let mut doc = Document::new("Nested source contexts");
+    let page = doc.first_page().unwrap();
+    let inner = component(&mut doc, page, "Inner");
+    let base = add(&mut doc, inner, NodeKind::Rectangle, "Body");
+    doc.node_mut(base).unwrap().transform = Affine::translate((2.0, 0.0));
+    let wrapper = component(&mut doc, page, "Wrapper");
+    let default_slot = instance(&mut doc, inner, wrapper, "Nested");
+    doc.node_mut(default_slot).unwrap().source = Some(inner);
+    let outer = component(&mut doc, page, "Outer");
+    let wrapper_slot = instance(&mut doc, wrapper, outer, "Wrapper slot");
+    doc.node_mut(wrapper_slot).unwrap().source = Some(wrapper);
+    let source_slot = doc.node(wrapper_slot).unwrap().children[0];
+    let context = doc.node(source_slot).unwrap().children[0];
+    doc.node_mut(context).unwrap().transform = Affine::translate((3.0, 0.0));
+    let root = instance(&mut doc, outer, page, "Outer copy");
+    let wrapper_copy = doc.node(root).unwrap().children[0];
+    let nested = doc.node(wrapper_copy).unwrap().children[0];
+    let child = doc.node(nested).unwrap().children[0];
+    doc.node_mut(nested).unwrap().name = "Renamed nested".into();
+    doc.node_mut(child).unwrap().transform = Affine::translate((2.0, 0.0));
+    for id in [nested, wrapper_copy, root] {
+        rebase_instance(&mut doc, id);
+        assert_eq!(doc.node(nested).unwrap().source, Some(source_slot));
+        assert_eq!(doc.node(child).unwrap().source, Some(context));
+    }
+    assert_eq!(doc.node(context).unwrap().source, Some(doc.node(default_slot).unwrap().children[0]));
+    assert_eq!(doc.node(context).unwrap().transform.translation().x, 3.0);
+    assert_eq!(doc.node(child).unwrap().transform.translation().x, 2.0);
+}
+
+#[test]
+fn rebase_preserves_placed_frame_to_instance_and_current_main_children() {
+    let mut doc = Document::new("Typed nested source");
+    let page = doc.first_page().unwrap();
+    let inner = component(&mut doc, page, "Inner");
+    let body = add(&mut doc, inner, NodeKind::Rectangle, "Body");
+    let outer = component(&mut doc, page, "Outer");
+    let slot = add(&mut doc, outer, NodeKind::Frame, "Empty slot");
+    let root = instance(&mut doc, outer, page, "Outer copy");
+    let nested = doc.node(root).unwrap().children[0];
+    doc.node_mut(nested).unwrap().kind = NodeKind::Instance { component: inner, props: BTreeMap::new() };
+    let child = mirror(&mut doc, body, nested);
+    rebase_instance(&mut doc, nested);
+    rebase_instance(&mut doc, root);
+    assert_eq!(doc.node(nested).unwrap().source, Some(slot));
+    assert_eq!(doc.node(child).unwrap().source, Some(body));
+    assert!(matches!(doc.node(nested).unwrap().kind, NodeKind::Instance { component, .. } if component == inner));
+}
+
+#[test]
+fn rebase_keeps_current_main_sources_and_component_delta_beneath_swap() {
+    let mut s = scene();
+    let page = s.doc.first_page().unwrap();
+    let replacement = component(&mut s.doc, page, "Replacement");
+    let body = add(&mut s.doc, replacement, NodeKind::Rectangle, "Body");
+    s.doc.node_mut(body).unwrap().transform = Affine::translate((7.0, 0.0));
+    s.doc.node_mut(s.nested).unwrap().kind = NodeKind::Instance { component: replacement, props: BTreeMap::new() };
+    s.doc.remove(s.child).unwrap();
+    s.child = mirror(&mut s.doc, body, s.nested);
+    s.doc.node_mut(s.child).unwrap().transform = Affine::translate((8.0, 0.0));
+    s.doc.node_mut(s.nested).unwrap().name = "Renamed swap".into();
+    rebase_instance(&mut s.doc, s.nested);
+    assert_eq!(s.doc.node(s.nested).unwrap().source, Some(s.slot));
+    assert!(s.doc.node(s.nested).unwrap().overrides.contains("component"));
+    rebase_instance(&mut s.doc, s.root);
+    assert_eq!(s.doc.node(s.nested).unwrap().source, Some(s.slot));
+    assert_eq!(s.doc.node(s.child).unwrap().source, Some(body));
+    assert!(s.doc.node(s.nested).unwrap().overrides.contains("component"));
+    assert_eq!(s.doc.node(s.child).unwrap().transform.translation().x, 8.0);
+}
+
+#[test]
+fn rebase_detached_nested_uses_own_main_and_keeps_inherited_geometry() {
+    let mut s = scene();
+    let page = s.doc.first_page().unwrap();
+    let detached = mirror(&mut s.doc, s.nested, page);
+    let child = s.doc.node(detached).unwrap().children[0];
+    // The old source references still exist, but their Outer context is absent here.
+    s.doc.node_mut(detached).unwrap().source = Some(s.slot);
+    s.doc.node_mut(child).unwrap().source = Some(s.context);
+    s.doc.node_mut(child).unwrap().transform = Affine::translate((3.0, 0.0));
+    rebase_instance(&mut s.doc, detached);
+    assert_eq!(s.doc.node(detached).unwrap().source, Some(s.inner));
+    assert_eq!(s.doc.node(child).unwrap().source, Some(s.base));
+    assert_eq!(s.doc.node(child).unwrap().transform.translation().x, 3.0);
+    assert_eq!(s.doc.node(s.base).unwrap().transform.translation().x, 2.0);
+}
+
+#[test]
+fn rebase_does_not_preserve_existing_foreign_or_stale_sources() {
+    let mut s = scene();
+    let page = s.doc.first_page().unwrap();
+    let foreign = component(&mut s.doc, page, "Foreign");
+    let foreign_body = add(&mut s.doc, foreign, NodeKind::Rectangle, "Body");
+    s.doc.node_mut(s.child).unwrap().source = Some(foreign_body);
+    both(&mut s);
+    assert_ne!(s.doc.node(s.child).unwrap().source, Some(foreign_body));
+    assert_eq!(s.doc.node(s.child).unwrap().source, Some(s.context));
+    let mut s = scene();
+    let page = s.doc.first_page().unwrap();
+    let replacement = component(&mut s.doc, page, "Replacement");
+    let body = add(&mut s.doc, replacement, NodeKind::Rectangle, "Body");
+    s.doc.node_mut(s.nested).unwrap().kind = NodeKind::Instance { component: replacement, props: BTreeMap::new() };
+    s.doc.node_mut(s.child).unwrap().source = Some(s.context);
+    both(&mut s);
+    assert_ne!(s.doc.node(s.child).unwrap().source, Some(s.context), "the old default-main child is stale after a swap");
+    assert!(s.doc.node(s.child).unwrap().source.is_none() || s.doc.node(s.child).unwrap().source == Some(body));
+}
+
+#[test]
+fn rebase_rejects_source_and_parent_cycles_with_bounded_lookups() {
+    let mut s = scene();
+    s.doc.node_mut(s.base).unwrap().source = Some(s.context);
+    both(&mut s);
+    assert_eq!(s.doc.node(s.child).unwrap().source, None);
+    let mut s = scene();
+    s.doc.node_mut(s.context).unwrap().parent = Some(s.context);
+    both(&mut s);
+    assert_ne!(s.doc.node(s.child).unwrap().source, Some(s.context));
+    let mut s = scene();
+    s.doc.node_mut(s.nested).unwrap().parent = Some(s.child);
+    s.doc.node_mut(s.child).unwrap().parent = Some(s.nested);
+    let sources = RebaseSources::new(&s.doc);
+    assert!(sources.owners(s.child).is_none());
+    let mut s = scene();
+    s.doc.node_mut(s.root).unwrap().kind = NodeKind::Instance { component: s.root, props: BTreeMap::new() };
+    rebase_instance(&mut s.doc, s.root);
+    assert_ne!(s.doc.node(s.root).unwrap().source, Some(s.root));
+}

crates/engine/src/components_scale_tests.rs

@@ -747,3 +747,29 @@ fn alt_dropping_a_library_component_swaps_to_it() {
     assert!(doc.node(glyph).unwrap().overrides.is_empty());
     let _ = std::fs::remove_dir_all(dir);
 }
+
+#[test]
+fn a_fill_set_on_a_bound_instance_layer_detaches_it_as_an_override() {
+    // Without unbinding first: the explicit colour detaches the variable on the instance layer only,
+    // and stays through main edits until the override is reset.
+    let mut s = Session::new();
+    let (chip, _) = bound_chip(&mut s);
+    let i = crate::params::id_of(&ex(&mut s, "instance.create", json!({"component": chip, "x": 200, "y": 0}))["id"]).unwrap();
+    let bg = find_path(s.doc().unwrap(), i, &["Bg"]).unwrap();
+    ex(&mut s, "node.set", json!({"ids": [bg], "props": {"fill": "#ff00ff"}}));
+    let n = s.doc().unwrap().node(bg).unwrap().clone();
+    assert_eq!(n.fills[0].solid_color().unwrap().to_hex(), "FF00FF");
+    assert!(!n.bound.contains_key("fill"));
+    assert!(n.overrides.contains("fills"));
+    let main_bg = find_path(s.doc().unwrap(), chip, &["Bg"]).unwrap();
+    ex(&mut s, "node.set", json!({"ids": [main_bg], "props": {"height": 28}}));
+    ex(&mut s, "variable.set", json!({"variable": "Chip", "value": "#445566"}));
+    let doc = s.doc().unwrap();
+    healthy(doc);
+    assert_eq!(doc.node(bg).unwrap().fills[0].solid_color().unwrap().to_hex(), "FF00FF");
+    assert!(doc.node(main_bg).unwrap().bound.contains_key("fill"), "the main keeps its binding");
+    ex(&mut s, "component.resetOverride", json!({"id": bg, "group": "fills"}));
+    let n = s.doc().unwrap().node(bg).unwrap();
+    assert!(n.bound.contains_key("fill"));
+    assert_eq!(n.fills[0].solid_color().unwrap().to_hex(), "445566");
+}

crates/engine/src/components_tests.rs

@@ -67,8 +67,6 @@ fn overrides_survive_main_edits() {
     ex(&mut s, "node.set", json!({"id": ibg, "props": {"effects": [{"type": "dropShadow"}]}}));
     ex(&mut s, "text.set", json!({"id": ititle, "characters": "Overridden"}));
     ex(&mut s, "node.set", json!({"id": idot, "props": {"visible": false}}));
-    // A layer inside an instance keeps its main's size (the instance itself resizes).
-    assert!(s.execute("node.set", &json!({"id": idot, "props": {"width": 30}})).is_err());
     let ov = node(&s, ibg).overrides;
     for g in ["fills", "strokes", "effects", "name"] {
         assert!(ov.contains(g), "{g} in {ov:?}");

crates/engine/src/convert_container_tests.rs

@@ -1,5 +1,5 @@
-//! Frames and groups converted into each other in place: the layers stay where they are on the
-//! page, what only a frame has goes with it, what can't convert is refused, one undo step.
+//! Frames, groups and sections converted into each other in place: the layers stay where they are on
+//! the page, what only a frame has goes with it, what can't convert is refused, one undo step.
 
 use serde_json::{Value, json};
 
@@ -136,7 +136,7 @@ fn what_cannot_convert_is_refused_and_nothing_changes() {
 #[test]
 fn junk_parameters_are_refused_not_fatal() {
     let junk = [json!(null), json!(true), json!(-1), json!(1e308), json!("x"), json!([[1]]), json!({"a": 1}), json!([0, 999_999, "7"])];
-    for cmd in ["object.convertToGroup", "object.convertToFrame"] {
+    for cmd in ["object.convertToGroup", "object.convertToFrame", "object.convertToSection"] {
         for j in &junk {
             let mut s = Session::new();
             let f = id(ex(&mut s, "frame.create", json!({"x": 0, "y": 0, "width": 50, "height": 50})));
@@ -148,3 +148,72 @@ fn junk_parameters_are_refused_not_fatal() {
         }
     }
 }
+
+#[test]
+fn a_frame_on_the_page_becomes_a_section_and_back() {
+    let mut s = Session::new();
+    let f = id(ex(&mut s, "frame.create", json!({"x": 100, "y": 50, "width": 300, "height": 200, "name": "Flow", "props": {"fill": "#FFEEDD"}})));
+    let (a, b) = (rect(&mut s, f, 20.0, 30.0), rect(&mut s, f, 400.0, 90.0));
+    ex(&mut s, "layout.add", json!({"ids": [f], "direction": "horizontal"}));
+    ex(&mut s, "node.set", json!({"id": f, "props": {"width": 300, "height": 200}}));
+    let before = [page_box(&s, a), page_box(&s, b), page_box(&s, f)];
+    assert_eq!(ex(&mut s, "object.convertToSection", json!({"ids": [f]}))["ids"], json!([f]));
+    let n = s.doc().unwrap().node(f).unwrap().clone();
+    assert!(matches!(n.kind, NodeKind::Section { contents_hidden: false }));
+    assert_eq!((n.name.as_str(), n.children.clone(), n.fills.len()), ("Flow", vec![a, b], 1), "same name, layers and fill");
+    assert!(n.layout.is_none() && !n.clip, "no auto layout or clipping on a section");
+    assert_eq!([page_box(&s, a), page_box(&s, b), page_box(&s, f)], before, "nothing moves");
+    // And back: a frame that keeps the fill and doesn't clip, so the look stays.
+    assert_eq!(ex(&mut s, "object.convertToFrame", json!({"ids": [f]}))["ids"], json!([f]));
+    let n = s.doc().unwrap().node(f).unwrap().clone();
+    assert!(matches!(n.kind, NodeKind::Frame) && n.fills.len() == 1 && !n.clip);
+    assert_eq!([page_box(&s, a), page_box(&s, b), page_box(&s, f)], before);
+    // Each conversion is one undo step.
+    ex(&mut s, "edit.undo", json!({}));
+    assert!(matches!(kind(&s, f), NodeKind::Section { .. }));
+    ex(&mut s, "edit.undo", json!({}));
+    assert!(matches!(kind(&s, f), NodeKind::Frame));
+    assert!(s.doc().unwrap().node(f).unwrap().layout.is_some(), "the frame's auto layout is back");
+}
+
+#[test]
+fn only_frames_on_the_page_or_in_a_section_become_sections() {
+    let mut s = Session::new();
+    let outer = id(ex(&mut s, "frame.create", json!({"x": 0, "y": 0, "width": 300, "height": 300})));
+    let inner = id(ex(&mut s, "frame.create", json!({"parent": outer, "x": 10, "y": 10, "width": 100, "height": 100})));
+    let err = s.execute("object.convertToSection", &json!({"ids": [inner]})).unwrap_err().to_string();
+    assert!(err.contains("inside a frame"), "{err}");
+    let r = rect(&mut s, outer, 150.0, 150.0);
+    assert!(s.execute("object.convertToSection", &json!({"ids": [r]})).is_err(), "a rectangle isn't a frame");
+    // A frame inside a section converts; a section holding a section can't become a frame.
+    let sec = id(ex(&mut s, "node.create", json!({"type": "section", "x": 500, "y": 0, "width": 400, "height": 400})));
+    let in_sec = id(ex(&mut s, "frame.create", json!({"parent": sec, "x": 20, "y": 20, "width": 100, "height": 100})));
+    ex(&mut s, "object.convertToSection", json!({"ids": [in_sec]}));
+    assert!(matches!(kind(&s, in_sec), NodeKind::Section { .. }));
+    let err = s.execute("object.convertToFrame", &json!({"ids": [sec]})).unwrap_err().to_string();
+    assert!(err.contains("holds sections"), "{err}");
+    assert!(matches!(kind(&s, sec), NodeKind::Section { .. }), "nothing changed");
+}
+
+#[test]
+fn wrapping_errors_name_the_command_that_was_run() {
+    // Grouping, framing, auto layout, masks and booleans share one wrapping step; a refusal names
+    // the command that asked, not `object.group`.
+    let mut s = Session::new();
+    let page = s.page().unwrap();
+    for cmd in ["object.group", "object.frameSelection", "layout.add", "bool.union"] {
+        let err = s.execute(cmd, &json!({"ids": [page]})).unwrap_err().to_string();
+        assert!(err.contains(&format!("`{cmd}`")), "{cmd}: {err}");
+    }
+    let r = rect(&mut s, page, 0.0, 0.0);
+    let err = s.execute("object.mask", &json!({"ids": [page, r]})).unwrap_err().to_string();
+    assert!(err.contains("`object.mask`"), "{err}");
+    let section = id(ex(&mut s, "node.create", json!({"type": "section", "x": 300, "y": 0, "width": 100, "height": 100})));
+    ex(&mut s, "node.set", json!({"ids": [section], "props": {"fills": ["#FFFFFF"], "strokes": ["#000000"], "strokeWeight": 1}}));
+    let err = s.execute("vector.outlineStroke", &json!({"ids": [section]})).unwrap_err().to_string();
+    assert!(err.contains("`vector.outlineStroke`"), "{err}");
+    let f = id(ex(&mut s, "frame.create", json!({"x": 100, "y": 0, "width": 100, "height": 100})));
+    let inner = rect(&mut s, f, 10.0, 10.0);
+    let err = s.execute("object.wrapInSection", &json!({"ids": [inner, r]})).unwrap_err().to_string();
+    assert!(err.contains("`object.wrapInSection`"), "{err}");
+}

crates/engine/src/cursor_tests.rs

@@ -202,15 +202,16 @@ fn an_edit_an_instance_refuses_shows_not_allowed_and_is_undone() {
     let before = s.doc().unwrap().world_bounds(inner).unwrap();
     assert_eq!((before.x0, before.y0, before.x1, before.y1), (450.0, 50.0, 550.0, 150.0));
     ex(&mut s, "select.set", json!({"ids": [inner]}));
-    // Resizing it by its right edge: only the main component can.
-    assert!(close(resize(hover(&mut s, (550.0, 100.0), NONE)), 0.0), "the handle still shows its arrow");
+    // Resizing it by its right edge: a size of its own (an override).
+    assert!(close(resize(hover(&mut s, (550.0, 100.0), NONE)), 0.0), "the handle shows its arrow");
     s.pointer(&ev(PointerKind::Down, (550.0, 100.0), NONE)).unwrap();
     s.pointer(&ev(PointerKind::Move, (570.0, 100.0), NONE)).unwrap();
     s.pointer(&ev(PointerKind::Move, (600.0, 100.0), NONE)).unwrap();
-    assert_eq!(s.tool.overlay.cursor, Cursor::NotAllowed);
+    assert_ne!(s.tool.overlay.cursor, Cursor::NotAllowed);
     s.pointer(&ev(PointerKind::Up, (600.0, 100.0), NONE)).unwrap();
-    assert_eq!(s.doc().unwrap().world_bounds(inner).unwrap(), before, "the resize was undone");
-    // Moving it: refused too.
+    let before = s.doc().unwrap().world_bounds(inner).unwrap();
+    assert_eq!((before.x0, before.x1), (450.0, 600.0), "the resize stays");
+    // Moving it: only the main component can.
     s.pointer(&ev(PointerKind::Down, (500.0, 100.0), NONE)).unwrap();
     s.pointer(&ev(PointerKind::Move, (510.0, 110.0), NONE)).unwrap();
     s.pointer(&ev(PointerKind::Move, (520.0, 120.0), NONE)).unwrap();

crates/engine/src/design_paste_tests.rs

@@ -0,0 +1,108 @@
+//! Paste of layers copied from another design app: the clipboard's design data (a `.fig` canvas in
+//! its HTML) read through the `.fig` import and pasted as Paste pastes our own layers.
+
+use base64::Engine as _;
+use serde_json::json;
+
+use super::*;
+use crate::cmd::edit::{CLIP_CLOSE, CLIP_OPEN, design_clipboard_buffer};
+
+const B64: base64::engine::GeneralPurpose = base64::engine::general_purpose::STANDARD;
+
+fn id(v: &Value) -> NodeId {
+    params::id_of(&v["id"]).unwrap()
+}
+
+fn copied_file() -> Vec<u8> {
+    let mut s = Session::new();
+    let frame = id(&s.execute("frame.create", &json!({"x": 0, "y": 0, "width": 200, "height": 100, "name": "Card"})).unwrap());
+    s.execute("node.create", &json!({"type": "rectangle", "x": 10, "y": 10, "width": 40, "height": 20, "parent": frame, "name": "Badge"})).unwrap();
+    s.execute("node.create", &json!({"type": "ellipse", "x": 300, "y": 0, "width": 50, "height": 50, "name": "Dot"})).unwrap();
+    let r = s.execute("file.export", &json!({"format": "fig"})).unwrap();
+    B64.decode(r["data"].as_str().unwrap()).unwrap()
+}
+
+fn clipboard_html(buffer: &[u8]) -> String {
+    let mut wrapped = B64.encode(buffer);
+    wrapped.insert(8, '\n');
+    format!(r#"<meta charset="utf-8"><span data-buffer="<!--{CLIP_OPEN}{wrapped}{CLIP_CLOSE}-->"></span>"#)
+}
+
+fn names(s: &Session, ids: &[NodeId]) -> Vec<String> {
+    let doc = s.doc().unwrap();
+    ids.iter().map(|i| doc.node(*i).unwrap().name.clone()).collect()
+}
+
+#[test]
+fn buffer_is_found_in_the_html() {
+    let file = copied_file();
+    assert_eq!(design_clipboard_buffer(&clipboard_html(&file)), Some(file));
+    assert_eq!(design_clipboard_buffer("<p>plain</p>"), None);
+    assert_eq!(design_clipboard_buffer(&format!("{CLIP_OPEN}not base64!{CLIP_CLOSE}")), None);
+    assert_eq!(design_clipboard_buffer(&format!("{CLIP_OPEN}{}{CLIP_CLOSE}", B64.encode(b"hello"))), None);
+    assert_eq!(design_clipboard_buffer(&format!("{CLIP_OPEN}ZmlnLQ")), None);
+    // Web text that only mentions the markers holds no design data.
+    assert_eq!(design_clipboard_buffer(&format!("<p>see {CLIP_OPEN} and {CLIP_CLOSE} in the docs</p>")), None);
+}
+
+#[test]
+fn oversized_design_data_is_refused_before_decoding() {
+    // Just past the cap (256 MB of data, as base64), made of valid base64 characters.
+    let big = "A".repeat((256 * 1024 * 1024usize).div_ceil(3) * 4 + 4);
+    assert_eq!(design_clipboard_buffer(&format!("{CLIP_OPEN}{big}{CLIP_CLOSE}")), None);
+    let mut s = Session::new();
+    let e = s.execute("edit.pasteDesignLayers", &json!({ "data": big })).unwrap_err();
+    assert!(e.to_string().contains("256 MB"), "{e}");
+    assert!(s.clipboard.nodes.is_empty());
+}
+
+#[test]
+fn layers_paste_into_the_page_and_undo() {
+    let mut s = Session::new();
+    let page = s.page().unwrap();
+    let r = s.execute("edit.pasteDesignLayers", &json!({"html": clipboard_html(&copied_file())})).unwrap();
+    let ids: Vec<NodeId> = r["ids"].as_array().unwrap().iter().map(|v| params::id_of(v).unwrap()).collect();
+    assert_eq!(names(&s, &ids), ["Card", "Dot"]);
+    assert_eq!(s.selection(), ids);
+    let doc = s.doc().unwrap();
+    assert!(ids.iter().all(|i| doc.node(*i).unwrap().parent == Some(page)));
+    let card = doc.node(ids[0]).unwrap();
+    assert_eq!(names(&s, &card.children), ["Badge"]);
+    assert_eq!((card.width, card.height), (200.0, 100.0));
+    assert!(s.undo().unwrap());
+    assert!(ids.iter().all(|i| !s.doc().unwrap().contains(*i)));
+}
+
+#[test]
+fn a_second_paste_repeats_the_copied_layers() {
+    let mut s = Session::new();
+    // `data` may be wrapped and unpadded, like the HTML's base64.
+    let mut data = B64.encode(copied_file()).trim_end_matches('=').to_string();
+    data.insert(8, '\n');
+    s.execute("edit.pasteDesignLayers", &json!({ "data": data })).unwrap();
+    let r = s.execute("edit.paste", &json!({})).unwrap();
+    let ids: Vec<NodeId> = r["ids"].as_array().unwrap().iter().map(|v| params::id_of(v).unwrap()).collect();
+    assert_eq!(names(&s, &ids), ["Card", "Dot"]);
+}
+
+#[test]
+fn pastes_into_the_selected_frame() {
+    let mut s = Session::new();
+    let host = id(&s.execute("frame.create", &json!({"x": 1000, "y": 0, "width": 800, "height": 600})).unwrap());
+    s.execute("select.set", &json!({"ids": [host]})).unwrap();
+    let r = s.execute("edit.pasteDesignLayers", &json!({"html": clipboard_html(&copied_file())})).unwrap();
+    let first = params::id_of(&r["ids"][0]).unwrap();
+    assert_eq!(s.doc().unwrap().node(first).unwrap().parent, Some(host));
+}
+
+#[test]
+fn other_content_is_refused_without_changes() {
+    let mut s = Session::new();
+    let before = s.doc().unwrap().nodes().count();
+    assert!(s.execute("edit.pasteDesignLayers", &json!({})).is_err());
+    assert!(s.execute("edit.pasteDesignLayers", &json!({"html": "<b>hi</b>"})).is_err());
+    assert!(s.execute("edit.pasteDesignLayers", &json!({"data": B64.encode(b"PK not a zip")})).is_err());
+    assert!(s.execute("edit.pasteDesignLayers", &json!({"data": B64.encode(b"fig-kiwi\x00\x00\x00\x00junk")})).is_err());
+    assert_eq!(s.doc().unwrap().nodes().count(), before);
+    assert!(s.clipboard.nodes.is_empty());
+}

crates/engine/src/doc_urls.rs

@@ -0,0 +1,48 @@
+//! Which URLs stored in a document may be handed to the browser or the system opener.
+//!
+//! A document can carry URLs that the app opens for whoever views it: a prototype's Open link
+//! action ([`crate::proto_run`]) and Dev Mode's dev resources ([`crate::dev_resources`]). Both end
+//! up at the platform's opener, so a document that someone else made chooses what that opener is
+//! asked to do. Only the schemes a browser would follow on a plain link are allowed:
+//!
+//! - `javascript:` runs script. In the web build the opener is `window.open`, which executes it in
+//!   the app's own origin, so a saved document becomes stored XSS.
+//! - `file:` and `smb:` reach the file system; on Windows a UNC host also sends credentials.
+//! - Windows hands `ms-…:` schemes to application handlers, and macOS and Linux hand unknown
+//!   schemes to whichever application registered them.
+//!
+//! The check is lexical and does no I/O. It is deliberately an allow-list: a deny-list of known
+//! dangerous schemes is outgrown by every new handler a platform adds.
+
+/// The schemes a URL stored in a document may use.
+const WEB_SCHEMES: [&str; 3] = ["http", "https", "mailto"];
+
+/// Whether `url`, stored in a document, may be opened.
+///
+/// Requires a scheme from [`WEB_SCHEMES`], compared ignoring ASCII case. A URL with no scheme is
+/// refused: the opener would resolve it against the app's own page on the web. Control characters
+/// are refused anywhere, because browsers ignore some of them inside a scheme (`java\tscript:`
+/// reaches a `javascript:` handler), and `http`/`https` must name a host.
+pub fn openable(url: &str) -> bool {
+    let url = url.trim();
+    if url.is_empty() || url.chars().any(char::is_control) {
+        return false;
+    }
+    let Some((scheme, rest)) = url.split_once(':') else { return false };
+    // An RFC 3986 scheme, so a stray colon in text cannot look like one.
+    let mut chars = scheme.chars();
+    if !chars.next().is_some_and(|c| c.is_ascii_alphabetic()) || !chars.all(|c| c.is_ascii_alphanumeric() || matches!(c, '+' | '-' | '.')) {
+        return false;
+    }
+    if !WEB_SCHEMES.iter().any(|s| scheme.eq_ignore_ascii_case(s)) {
+        return false;
+    }
+    if scheme.eq_ignore_ascii_case("mailto") {
+        // `mailto:` names an address.
+        return !rest.is_empty();
+    }
+    // `http` and `https` name a host, so the authority is required: `http:x` is not a web link,
+    // and `http:///p` has no host.
+    let Some(after) = rest.strip_prefix("//") else { return false };
+    !after.is_empty() && !after.starts_with('/')
+}

crates/engine/src/doc_urls_tests.rs

@@ -0,0 +1,87 @@
+//! A URL stored in a document reaches the browser or the system opener, so only the schemes a
+//! browser follows on a plain link are allowed ([`crate::doc_urls`]).
+
+use crate::doc_urls::openable;
+
+#[test]
+fn web_links_are_opened() {
+    for url in [
+        "http://example.com",
+        "https://example.com",
+        "https://example.com/a/b?c=d#e",
+        "HTTPS://EXAMPLE.COM",
+        "HtTp://example.com",
+        "mailto:[email protected]",
+        "mailto:[email protected]?subject=hi",
+        "  https://example.com  ",
+        "https://user:[email protected]:8443/p",
+    ] {
+        assert!(openable(url), "{url:?} should open");
+    }
+}
+
+#[test]
+fn script_and_handler_schemes_are_refused() {
+    for url in [
+        // Runs in the app's own origin on the web build: a saved document would be stored XSS.
+        "javascript:alert(1)",
+        "JavaScript:alert(1)",
+        "jAvAsCrIpT:alert(document.cookie)",
+        "vbscript:msgbox(1)",
+        "data:text/html,<script>alert(1)</script>",
+        "blob:https://example.com/x",
+        // Reach the file system; a UNC host also sends Windows credentials.
+        "file:///etc/passwd",
+        "file://attacker.example/share/x",
+        "smb://attacker.example/share/x",
+        "webdav://attacker.example/x",
+        // Windows application handlers.
+        "ms-msdt:/id PCWDiagnostic",
+        "ms-officecmd:x",
+        "search-ms:query=x",
+        "shell:startup",
+        // Anything else a platform may have registered.
+        "tel:+1234",
+        "sms:+1234",
+        "ssh://host",
+        "ftp://host/x",
+        "figcraft://join?host=127.0.0.1",
+        "zoommtg://zoom.us/join?x",
+        "view-source:https://example.com",
+        "jar:https://example.com/x!/y",
+    ] {
+        assert!(!openable(url), "{url:?} must be refused");
+    }
+}
+
+#[test]
+fn a_scheme_is_required_and_control_characters_are_refused() {
+    for url in [
+        // No scheme: the web opener would resolve these against the app's own page.
+        "",
+        "   ",
+        "example.com",
+        "/etc/passwd",
+        "//example.com",
+        "\\\\host\\share\\x",
+        "about",
+        // Browsers ignore some control characters inside a scheme, so a smuggled one must not
+        // leave `javascript` looking like an unknown scheme that we then refuse by luck.
+        "java\tscript:alert(1)",
+        "java\nscript:alert(1)",
+        "java\rscript:alert(1)",
+        "javascript\u{0}:alert(1)",
+        "https://example.com/\u{0}",
+        // A colon in ordinary text is not a scheme.
+        "see page 2: the diagram",
+        "1https://example.com",
+        // The allowed schemes still need their own part.
+        "mailto:",
+        "http:",
+        "http:example.com",
+        "http:///p",
+        "https://",
+    ] {
+        assert!(!openable(url), "{url:?} must be refused");
+    }
+}

crates/engine/src/duplicate_spacing_tests.rs

@@ -157,3 +157,49 @@ fn an_alt_drag_into_auto_layout_sets_no_step() {
     cmd_d(&mut s);
     assert_eq!(s.doc().unwrap().node(f).unwrap().children.len(), n + 1, "Duplicate still adds one to the flow");
 }
+
+/// Drag `from` by `by` with no modifier: moving the selection, not copying it.
+fn drag_move(s: &mut Session, from: (f64, f64), by: (f64, f64)) {
+    let ev = |kind, (x, y): (f64, f64)| PointerEvent::at(kind, x, y, 1.0);
+    s.pointer(&ev(PointerKind::Down, from)).unwrap();
+    for k in 1..=4 {
+        let t = f64::from(k) / 4.0;
+        s.pointer(&ev(PointerKind::Move, (from.0 + by.0 * t, from.1 + by.1 * t))).unwrap();
+    }
+    s.pointer(&ev(PointerKind::Up, (from.0 + by.0, from.1 + by.1))).unwrap();
+}
+
+/// The reported path (#567): Cmd+D, drag the copy with the mouse, Cmd+D again. The other tests
+/// here set the copy's position with `node.set` or Alt-drag it; dragging is how it is usually done,
+/// and the step is measured from where the copy ended up, whichever way it got there.
+#[test]
+fn duplicate_repeats_the_step_set_by_dragging_the_copy() {
+    let mut s = Session::new();
+    let a = rect(&mut s, 0.0, 0.0);
+    ex(&mut s, "select.set", json!({"ids": [a]}));
+    let c1 = cmd_d(&mut s);
+    assert_eq!(at(&s, c1), (0.0, 0.0), "the first copy lands in place");
+
+    drag_move(&mut s, (50.0, 50.0), (150.0, 20.0));
+    assert_eq!(at(&s, c1), (150.0, 20.0), "the drag moved the copy, it did not make another one");
+    assert_eq!(s.selection(), vec![c1], "and left it selected");
+    assert_eq!(at(&s, a), (0.0, 0.0), "the original stays");
+
+    let c2 = cmd_d(&mut s);
+    assert_eq!(at(&s, c2), (300.0, 40.0), "the next one as far again");
+    let c3 = cmd_d(&mut s);
+    assert_eq!(at(&s, c3), (450.0, 60.0), "and again");
+}
+
+/// And a step set with the arrow keys, which is how a small offset is usually made exact.
+#[test]
+fn duplicate_repeats_a_nudged_step() {
+    let mut s = Session::new();
+    let a = rect(&mut s, 0.0, 0.0);
+    ex(&mut s, "select.set", json!({"ids": [a]}));
+    let c1 = cmd_d(&mut s);
+    ex(&mut s, "transform.nudge", json!({"dx": 40, "dy": 0}));
+    assert_eq!(at(&s, c1), (40.0, 0.0));
+    let c2 = cmd_d(&mut s);
+    assert_eq!(at(&s, c2), (80.0, 0.0), "the nudge is the step");
+}

crates/engine/src/effects_tests.rs

@@ -51,6 +51,32 @@ fn effect_set_edits_noise_texture_and_glass() {
     assert!(s.execute("effect.set", &json!({"ids": [r], "index": 0, "effect": {"type": "glass", "depth": "deep"}})).is_err());
 }
 
+/// A key an effect doesn't have is refused, naming what it takes: serde dropped it without a word,
+/// so a shadow given `offsetX`/`offsetY` (the names variable bindings use) kept the default offset.
+#[test]
+fn effects_refuse_keys_they_dont_have() {
+    let mut s = Session::new();
+    let r = rect(&mut s);
+    let shadow = json!({"type": "dropShadow", "color": "#00000040", "offsetX": 0, "offsetY": 1, "radius": 3});
+    let err = s.execute("node.set", &json!({"ids": [r], "props": {"effects": [shadow]}})).unwrap_err().to_string();
+    assert!(err.contains("effects[0]") && err.contains("offsetX, offsetY") && err.contains("offset"), "{err}");
+    assert!(s.doc().unwrap().node(r).unwrap().effects.is_empty(), "nothing stored");
+    let err = s.execute("effect.add", &json!({"ids": [r], "effect": {"type": "layerBlur", "radious": 8}})).unwrap_err().to_string();
+    assert!(err.contains("radious"), "{err}");
+    s.execute("effect.add", &json!({"ids": [r], "type": "dropShadow"})).unwrap();
+    let err = s.execute("effect.set", &json!({"ids": [r], "index": 0, "effect": {"type": "dropShadow", "spred": 2}})).unwrap_err().to_string();
+    assert!(err.contains("spred"), "{err}");
+    // Every kind's own keys still go in, camelCase or snake_case, and so does what inspect reports.
+    for ty in ["innerShadow", "layerBlur", "backgroundBlur", "noise", "texture", "glass"] {
+        s.execute("effect.add", &json!({"ids": [r], "type": ty})).unwrap();
+    }
+    let reported = crate::inspect::node_json(s.doc().unwrap(), r, 0)["effects"].clone();
+    s.execute("node.set", &json!({"ids": [r], "props": {"effects": reported}})).unwrap();
+    let camel = json!({"type": "dropShadow", "offset": [0, 1], "showBehind": true, "visible": true});
+    let snake = json!({"type": "innerShadow", "offset": [0, 1], "show_behind": false});
+    s.execute("node.set", &json!({"ids": [r], "props": {"effects": [camel, snake]}})).unwrap();
+}
+
 #[test]
 fn scaling_scales_grain_and_glass() {
     let mut s = Session::new();

crates/engine/src/fig_import_tests.rs

@@ -50,3 +50,43 @@ fn local_samples_match_their_exports() {
         }
     }
 }
+
+/// Layers of an instance copy keep their link to the layer they stand for when the file is
+/// opened, also after they were renamed in the copy (a name is no identity), and the override
+/// that a rename is stays an override.
+#[test]
+fn opened_fig_links_instance_layers_by_identity_not_by_name() {
+    use base64::Engine as _;
+    let mut s = Session::new();
+    let make = |s: &mut Session, cmd: &str, p: serde_json::Value| s.execute(cmd, &p).unwrap()["id"].as_u64().map(figcraft_doc::NodeId).unwrap();
+    let body = make(&mut s, "frame.create", json!({"x": 0, "y": 0, "width": 40, "height": 20, "name": "Inner"}));
+    let label = make(&mut s, "text.create", json!({"text": "Label", "x": 2, "y": 2, "parent": body, "props": {"name": "Label"}}));
+    let inner = make(&mut s, "component.create", json!({"ids": [body]}));
+    let frame = make(&mut s, "frame.create", json!({"x": 100, "y": 0, "width": 200, "height": 60, "name": "Outer"}));
+    let outer = make(&mut s, "component.create", json!({"ids": [frame]}));
+    let slot = make(&mut s, "instance.create", json!({"component": inner, "x": 0, "y": 0, "parent": outer}));
+    s.execute("node.set", &json!({"id": slot, "props": {"name": "Slot"}})).unwrap();
+    let copy = make(&mut s, "instance.create", json!({"component": outer, "x": 0, "y": 200}));
+    let copy_slot = s.doc().unwrap().node(copy).unwrap().children[0];
+    let copy_label = s.doc().unwrap().node(copy_slot).unwrap().children[0];
+    s.execute("node.set", &json!({"id": copy_slot, "props": {"name": "Renamed slot"}})).unwrap();
+    s.execute("node.set", &json!({"id": copy_label, "props": {"name": "Renamed label"}})).unwrap();
+    let _ = label;
+
+    let exported = s.execute("file.export", &json!({"format": "fig"})).unwrap();
+    let path = std::env::temp_dir().join(format!("figcraft-slots-{}.fig", std::process::id()));
+    std::fs::write(&path, base64::engine::general_purpose::STANDARD.decode(exported["data"].as_str().unwrap()).unwrap()).unwrap();
+    let mut opened = Session::new();
+    let result = opened.execute("file.open", &json!({"path": path.to_string_lossy()}));
+    let _ = std::fs::remove_file(&path);
+    result.unwrap();
+    let doc = opened.doc().unwrap();
+    let outer = doc.nodes().find(|n| n.name == "Outer" && matches!(n.kind, NodeKind::Component { .. })).unwrap();
+    let copy = doc.nodes().find(|n| n.name == "Outer" && matches!(n.kind, NodeKind::Instance { .. })).unwrap();
+    let slot = doc.node(copy.children[0]).unwrap();
+    let label = doc.node(slot.children[0]).unwrap();
+    assert_eq!((slot.name.as_str(), label.name.as_str()), ("Renamed slot", "Renamed label"));
+    assert_eq!(slot.source, Some(outer.children[0]));
+    assert_eq!(label.source, Some(doc.node(outer.children[0]).unwrap().children[0]));
+    assert!(slot.overrides.contains("name") && label.overrides.contains("name"));
+}