Merge pull request #2700 from andeecollard/fix/trace-large-images-warn

Image Trace: large images trace with a warning; anchor limit 8,000,000

crates/engine/src/cmd/buildcmds.rs

@@ -129,7 +129,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Make",
             ["Object", "Image Trace"],
             None,
-            "{id?: image or Image Trace group (default: selection), preset?: name (imageTrace.presets), enhanced?: false (the preset's enhanced version: with Auto Grouping, and with Shapes in all but High Fidelity Photo; Flat Logo has none and is traced as it is), params?: {mode: \"blackAndWhite\"|\"grayscale\"|\"color\"|\"logo\", threshold: 0-255, palette: \"limited\"|\"fullTone\"|\"automatic\"|\"documentLibrary\" (color mode; limited: the `colors` best colours, fullTone: as many as the tones need, more with colorDetail, automatic: flat art with its own colours, else fullTone, documentLibrary: at most `colors` of the library's colours, as they are), colors: 2-256, colorDetail: 0-100 (fullTone, automatic), library: \"document\" (the document's swatches) or a swatch library id or name (swatch.library.list; documentLibrary), paths: 0-100, corners: 0-100, noise: px, method: \"abutting\"|\"overlapping\", ignoreWhite (leave out white areas), ignoreColor?: \"#rrggbb\" (with ignoreWhite: the colour left out instead of white), snapCurvesToLines, shapes: false (filled outlines that are a circle, an ellipse, a rectangle or a regular polygon come out as that live shape), autoGrouping: false (each path that has others inside it is grouped with them), gradients: false (grayscale and color: an area whose colour changes evenly along one direction is one path with a linear gradient fill), fills: true, strokes: false (Create: lines up to strokeWidth wide become stroked centre lines; without fills, wider areas become stroked outlines), strokeWidth: px (10), logoColors?: [\"#rrggbb\"…] (mode logo: flat-colour logos only; colours found automatically or named here, white is always its own colour, at most ten; noise = areas under noise/10 px ignored; edges to a fraction of a pixel, sharp corners restored, lines and circles snapped; enclosed transparent areas are painted white unless ignoreWhite makes them holes; fills/strokes are ignored; gradients and photos are refused)}, view?: as imageTrace.setView (default: the traced object's own, else tracingResult), ids?: [id…] (instead of id)} → {id, paths, anchors, colors}",
+            "{id?: image or Image Trace group (default: selection), preset?: name (imageTrace.presets), enhanced?: false (the preset's enhanced version: with Auto Grouping, and with Shapes in all but High Fidelity Photo; Flat Logo has none and is traced as it is), params?: {mode: \"blackAndWhite\"|\"grayscale\"|\"color\"|\"logo\", threshold: 0-255, palette: \"limited\"|\"fullTone\"|\"automatic\"|\"documentLibrary\" (color mode; limited: the `colors` best colours, fullTone: as many as the tones need, more with colorDetail, automatic: flat art with its own colours, else fullTone, documentLibrary: at most `colors` of the library's colours, as they are), colors: 2-256, colorDetail: 0-100 (fullTone, automatic), library: \"document\" (the document's swatches) or a swatch library id or name (swatch.library.list; documentLibrary), paths: 0-100, corners: 0-100, noise: px, method: \"abutting\"|\"overlapping\", ignoreWhite (leave out white areas), ignoreColor?: \"#rrggbb\" (with ignoreWhite: the colour left out instead of white), snapCurvesToLines, shapes: false (filled outlines that are a circle, an ellipse, a rectangle or a regular polygon come out as that live shape), autoGrouping: false (each path that has others inside it is grouped with them), gradients: false (grayscale and color: an area whose colour changes evenly along one direction is one path with a linear gradient fill), fills: true, strokes: false (Create: lines up to strokeWidth wide become stroked centre lines; without fills, wider areas become stroked outlines), strokeWidth: px (10), logoColors?: [\"#rrggbb\"…] (mode logo: flat-colour logos only; colours found automatically or named here, white is always its own colour, at most ten; noise = areas under noise/10 px ignored; edges to a fraction of a pixel, sharp corners restored, lines and circles snapped; enclosed transparent areas are painted white unless ignoreWhite makes them holes; fills/strokes are ignored; gradients and photos are refused)}, view?: as imageTrace.setView (default: the traced object's own, else tracingResult), ids?: [id…] (instead of id)} → {id, paths, anchors, colors, warnings: [text…] (the image is over 1500 px on a side, so it traces more slowly; or it was traced scaled down)}",
             has_selection_or_ids,
             |s, p| trace_make(s, p, false)
         ),
@@ -859,9 +859,16 @@ fn trace_library(s: &Session, params: &mut tr::TraceParams) -> Result<Vec<([u8;
     Ok(library)
 }
 
-/// The most anchor points an Image Trace may make: a photo traced at high fidelity can make
-/// millions, more than the canvas draws smoothly or a laptop has memory for, so the trace is
-/// refused with advice instead (#525).
+/// The most anchor points an Image Trace may make, a guard for memory: a trace past it is refused
+/// with advice instead (#525). A trace keeps about 90 bytes an anchor in the document (measured on
+/// code-drawn photos of 2000 × 2000 to 6000 × 4000 pixels), so 8,000,000 anchors are about
+/// 0.7 GB, with a peak of about 1 GB while tracing: a 4000 × 3000 photo at High Fidelity Photo
+/// makes about 1.9 million, and even at Paths 100, Noise 1 and every tone about 7.9 million. On the
+/// web, where a page has at most 4 GB of memory, the limit stays at 2,000,000.
+#[cfg(not(target_arch = "wasm32"))]
+pub const MAX_TRACE_ANCHORS: usize = 8_000_000;
+/// The most anchor points an Image Trace may make on the web (see the native limit).
+#[cfg(target_arch = "wasm32")]
 pub const MAX_TRACE_ANCHORS: usize = 2_000_000;
 
 /// The live shape for a shape the tracer found (in the image's pixels), placed in the document by `xf`.
@@ -975,6 +982,7 @@ fn trace_make(s: &mut Session, p: &Value, expand: bool) -> Result<Value> {
     let raster = tr::Raster::decode_to_fit(&blob.bytes).map_err(|e| EngineError::Other(e.to_string()))?;
     let library = trace_library(s, &mut params)?;
     let res = tr::trace_within(&raster, &params, MAX_TRACE_ANCHORS).map_err(|e| EngineError::Other(e.to_string()))?;
+    let warnings = trace_warnings((img.width, img.height), (raster.width, raster.height));
     // Pixel space of the decoded raster → the image object's pixel space → document.
     let sx = img.width.max(1) as f64 / raster.width.max(1) as f64;
     let sy = img.height.max(1) as f64 / raster.height.max(1) as f64;
@@ -1044,7 +1052,34 @@ fn trace_make(s: &mut Session, p: &Value, expand: bool) -> Result<Value> {
         sel.set([gid]);
         Ok(gid)
     })?;
-    Ok(json!({ "id": id.0, "paths": npaths, "anchors": anchors, "colors": colors }))
+    Ok(json!({ "id": id.0, "paths": npaths, "anchors": anchors, "colors": colors, "warnings": warnings }))
+}
+
+/// Images larger than this on a side are traced, but more slowly: the trace says so.
+pub const LARGE_TRACE_SIDE: u32 = 1500;
+
+/// What a trace of an image of `size` pixels, traced at `traced` pixels, tells the user: that a
+/// large image takes longer (the public documentation's warning for images over 1500 px), and that
+/// one over the tracer's [`tr::MAX_PIXELS`] was traced scaled down.
+pub(crate) fn trace_warnings(size: (u32, u32), traced: (u32, u32)) -> Vec<String> {
+    let mut out = vec![];
+    if size.0.max(size.1) > LARGE_TRACE_SIDE {
+        out.push(format!(
+            "The image is {} × {} pixels, more than {LARGE_TRACE_SIDE} on a side: it is traced, but more slowly. A lower-fidelity preset or a smaller copy of the image traces faster.",
+            size.0, size.1
+        ));
+    }
+    if u64::from(traced.0) * u64::from(traced.1) < u64::from(size.0) * u64::from(size.1) {
+        out.push(format!(
+            "The image was traced at {} × {} pixels, scaled down from {} × {} ({} megapixels at most).",
+            traced.0,
+            traced.1,
+            size.0,
+            size.1,
+            tr::MAX_PIXELS >> 20
+        ));
+    }
+    out
 }
 
 fn trace_targets(s: &Session, p: &Value) -> Result<Vec<NodeId>> {
@@ -1113,3 +1148,21 @@ fn trace_expand(s: &mut Session, p: &Value) -> Result<Value> {
     })?;
     Ok(json!({ "ids": ids_json(&targets) }))
 }
+
+#[cfg(test)]
+mod trace_limit_tests {
+    use super::{MAX_TRACE_ANCHORS, trace_warnings};
+
+    #[test]
+    fn trace_warnings_name_a_large_or_scaled_down_image() {
+        assert!(trace_warnings((1500, 1500), (1500, 1500)).is_empty());
+        assert_eq!(trace_warnings((1501, 10), (1501, 10)).len(), 1);
+        let w = trace_warnings((16000, 12000), (9459, 7094));
+        assert_eq!(w.len(), 2, "{w:?}");
+        assert!(w[0].contains("16000 × 12000") && w[1].contains("9459 × 7094") && w[1].contains("64 megapixels"), "{w:?}");
+    }
+
+    // A 4000 × 3000 photo at High Fidelity Photo makes about 1.9 million anchors, which must fit;
+    // the limit still guards memory (about 90 bytes an anchor). Checked when the tests build.
+    const _: () = assert!(MAX_TRACE_ANCHORS >= 2_000_000 && MAX_TRACE_ANCHORS <= 16_000_000);
+}

crates/engine/src/tests_build.rs

@@ -908,6 +908,34 @@ fn traced_paths(n: &Node) -> Vec<Arc<Node>> {
     n.children().unwrap().iter().filter(|c| !matches!(c.kind, NodeKind::Image(_))).cloned().collect()
 }
 
+#[test]
+fn a_large_image_traces_with_a_warning() {
+    // The public documentation: images over 1500 px on a side are traced, only more slowly.
+    let mut s = session();
+    let art = vectorcraft_trace::Raster::from_fn(
+        1600,
+        40,
+        |x, y| if (100..1500).contains(&x) && (10..30).contains(&y) { [0, 0, 0, 255] } else { [255; 4] },
+    );
+    add_image(&mut s, &art, Affine::IDENTITY);
+    let r = s.execute("imageTrace.make", &json!({"params": {"ignoreWhite": true}})).unwrap();
+    assert_eq!(r["paths"], 1);
+    let w = r["warnings"].as_array().unwrap();
+    assert_eq!(w.len(), 1, "{w:?}");
+    assert!(w[0].as_str().unwrap().contains("1600 × 40") && w[0].as_str().unwrap().contains("1500"), "{w:?}");
+    // Make and Expand says so too.
+    let r = s.execute("imageTrace.makeAndExpand", &json!({"id": r["id"], "params": {"ignoreWhite": true}})).unwrap();
+    assert_eq!(r["warnings"].as_array().map(Vec::len), Some(1));
+    // At 1500 px and under, no warning.
+    let mut s = session();
+    image_doc(&mut s);
+    let r = s.execute("imageTrace.make", &json!({})).unwrap();
+    assert_eq!(r["warnings"], json!([]));
+    let edge = vectorcraft_trace::Raster::from_fn(1500, 8, |x, _| if x < 700 { [0, 0, 0, 255] } else { [255; 4] });
+    add_image(&mut s, &edge, Affine::IDENTITY);
+    assert_eq!(s.execute("imageTrace.make", &json!({})).unwrap()["warnings"], json!([]));
+}
+
 #[test]
 fn image_trace_make_places_paths_over_the_image() {
     let mut s = session();

crates/trace/tests/quality/main.rs

@@ -33,7 +33,7 @@ use measure::{Metrics, measure};
 use vectorcraft_trace::{Raster, TraceParams, TraceResult, TracedPath, presets, trace_within};
 
 /// The engine's limit (`MAX_TRACE_ANCHORS`): a trace past it is refused.
-const MAX_ANCHORS: usize = 2_000_000;
+const MAX_ANCHORS: usize = 8_000_000;
 
 struct Counting;
 static LIVE: AtomicUsize = AtomicUsize::new(0);
@@ -243,7 +243,7 @@ fn cost(img: &Raster, params: &TraceParams) -> String {
         Ok(res) => format!("{secs:.2} s, {} paths, {} anchors, {mb:.0} MB", res.paths.len(), res.anchor_count()),
         Err(e) => {
             let why = e.to_string();
-            let why = if why.contains("anchor points") { "over 2,000,000 anchors" } else { "not flat art" };
+            let why = if why.contains("anchor points") { "over 8,000,000 anchors" } else { "not flat art" };
             format!("refused after {secs:.2} s ({why}), {mb:.0} MB")
         }
     }
@@ -341,7 +341,7 @@ fn report() -> String {
         .map(|mp| (mp.sqrt() * 1024.0).round() as u32)
         .collect();
     let (photo, badge) = (inputs.iter().find(|i| i.name == "photo-like").unwrap(), inputs.iter().find(|i| i.name == "four-colour badge").unwrap());
-    md += "\n## 5. Cost\n\nOne trace at a time on this machine (all cores); memory is the peak allocated above the image itself. A trace of more than 2,000,000 anchors is refused, as in the app.\n\n| preset | image | megapixels | result |\n|:--|:--|--:|:--|\n";
+    md += "\n## 5. Cost\n\nOne trace at a time on this machine (all cores); memory is the peak allocated above the image itself. A trace of more than 8,000,000 anchors is refused, as in the app.\n\n| preset | image | megapixels | result |\n|:--|:--|--:|:--|\n";
     for size in sizes {
         let n = size as usize;
         let images = [("photo-like", photo.draw(size, Variant::Clean)), ("four-colour badge", raster::render(&badge.scaled(size), badge.bg, n, n))];

crates/ui-egui/src/lib.rs

@@ -751,6 +751,12 @@ impl VectorcraftApp {
         match &r {
             Err(e) => self.ui.status = e.clone(),
             Ok(v) => {
+                // Image Trace's notes (a large image traces more slowly, or was scaled down).
+                if id.starts_with("imageTrace.make")
+                    && let Some(w) = v["warnings"].as_array().and_then(|w| w.first()).and_then(Value::as_str)
+                {
+                    self.ui.status = w.to_string();
+                }
                 if id == "file.new" {
                     self.ui.status.clear();
                     // New Document's Pixel preview mode (Overprint Preview is the engine's).

crates/ui-egui/src/panels/image_trace.rs

@@ -519,6 +519,20 @@ mod tests {
         app
     }
 
+    #[test]
+    fn a_large_image_traces_and_the_status_bar_says_it_is_slower() {
+        let mut app = VectorcraftApp::new(vectorcraft_engine::Session::new(), Default::default());
+        app.session.execute("file.new", &json!({"width": 100, "height": 100})).unwrap();
+        let img = image::RgbaImage::from_fn(1601, 12, |x, _| image::Rgba(if x < 800 { [0, 0, 0, 255] } else { [255, 255, 255, 255] }));
+        let mut png = vec![];
+        img.write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png).unwrap();
+        let data = vectorcraft_format::base64_encode(&png);
+        app.run("file.place", json!({"name": "wide.png", "dataBase64": data, "link": false})).unwrap();
+        trace_with(&mut app, "Default");
+        assert!(target(&app).2.is_some(), "the image is traced");
+        assert!(app.ui.status.contains("1601 × 12") && app.ui.status.contains("more slowly"), "{}", app.ui.status);
+    }
+
     #[test]
     fn sketch_quick_trace_reveals_all_adjustments_and_keeps_the_source() {
         let mut app = traced_app();

docs/image-trace-adjustments.md

@@ -26,6 +26,15 @@ so Undo also restores the panel values before its next frame. View can show the
 Use **Expand** when finished to turn the result into ordinary editable vector objects;
 after expanding, the tracing settings are no longer available. **Release** restores the source.
 
+**Large images.** An image of more than 1500 pixels on a side is traced as any other, only more
+slowly, and the trace says so: `imageTrace.make` returns the note in `warnings` and the status bar
+shows it (the [results optimization](https://helpx.adobe.com/illustrator/using/image-trace-results-optimization.html)
+page describes the same warning for images over 1500 px). An image of more than 64 megapixels (up to
+192) is traced from a copy scaled down to 64 megapixels, and the trace says that too. A trace that would
+make more than 8,000,000 anchor points (2,000,000 on the web) is refused to protect memory, with advice:
+raise Noise, lower Paths or Colors, or pick a lower-fidelity preset. A trace keeps
+about 90 bytes an anchor; a 4000 × 3000 photo at High Fidelity Photo makes about 1.9 million.
+
 These controls use VectorCraft's existing tracing algorithm. Parameter effects follow its
 implementation; they do not claim pixel-identical results with another application.
 The terminology and general control behavior are described in the

docs/image-trace-quality.md

@@ -1,5 +1,6 @@
 # Image Trace quality
 
+> **Last reviewed:** 2026-10-14 · **Last updated:** 2026-10-17 · **Change:** minor (Image Trace: large images trace with a warning; anchor limit raised to 8,000,000; earlier: Gradients: grown over noise and soft rims)
 > **Last reviewed:** 2026-10-14 · **Last updated:** 2026-10-17 · **Change:** minor (Image Trace: Raster::new returns an error for a buffer of the wrong length; earlier: Gradients: grown over noise and soft rims)
 > **Last reviewed:** 2026-10-17 · **Last updated:** 2026-10-17 · **Change:** minor (Create Strokes: maximal-disc pruning and junction merging; centre-lines rerun)
 > **Last reviewed:** 2026-10-17 · **Last updated:** 2026-10-17 · **Change:** minor (Create Strokes: exact crop distances and Guo–Hall thinning; centre-lines rerun)
@@ -14,8 +15,37 @@ compared with the numbers before each change. Nothing here is a judgement by eye
 with any other product except the open tracer named under [Yardstick](#4-yardstick).
 
 
-## Collapsed loops keep few segments
+## Large images
 
+Images over 1500 px on a side are traced with a warning that they trace more slowly (see
+[image-trace-adjustments.md](image-trace-adjustments.md)), and the anchor limit that guards memory is
+8,000,000 (2,000,000 on the web) instead of 2,000,000. Measured through `imageTrace.make` (release
+build, 4 cores, one trace at a time; memory is the peak allocated above the placed image, and what the
+document keeps after the trace) on code-drawn photo-like pictures (40 soft-edged shaded discs on a
+gradient, texture, sensor noise):
+
+| size | preset | time | anchors | paths | peak | kept |
+|:--|:--|--:|--:|--:|--:|--:|
+| 2000 × 2000 | High Fidelity Photo | 4.1 s | 737,478 | 16,064 | 152 MB | 52 MB |
+| 2000 × 2000 | Low Fidelity Photo | 1.6 s | 114,008 | 1,486 | 142 MB | 7 MB |
+| 2000 × 2000 | Default | 0.9 s | 103,084 | 1,001 | 117 MB | 6 MB |
+| 3000 × 2000 | High Fidelity Photo | 6.4 s | 1,013,114 | 25,256 | 236 MB | 75 MB |
+| 3000 × 2000 | Default | 1.2 s | 145,756 | 1,574 | 162 MB | 9 MB |
+| 4000 × 3000 | High Fidelity Photo | 12.8 s | 1,914,018 | 58,638 | 471 MB | 150 MB |
+| 4000 × 3000 | Low Fidelity Photo | 5.1 s | 258,826 | 4,833 | 428 MB | 18 MB |
+| 4000 × 3000 | Default | 2.4 s | 273,392 | 3,568 | 317 MB | 17 MB |
+| 4000 × 3000 | 16 Colors | 3.0 s | 103,222 | 2,434 | 364 MB | 7 MB |
+| 4000 × 3000 | Full Tone, Colors 85, Paths 90, Noise 4 | 29.6 s | 5,230,847 | 164,687 | 684 MB | 412 MB |
+| 4000 × 3000 | Full Tone, Colors 100, Paths 100, Noise 1 | 37.2 s | 7,885,709 | 338,561 | 876 MB | 685 MB |
+| 6000 × 4000 | Full Tone, Colors 85, Paths 90, Noise 4 | 106.1 s | 10,445,409 | 398,772 | 1169 MB | 872 MB |
+| 6000 × 4000 | Full Tone, Colors 100, Paths 100, Noise 1 | 116.3 s | 13,508,871 | 658,133 | 1456 MB | 1230 MB |
+
+(The last two rows were measured without a limit; they are refused now.) The 4000 × 3000 High Fidelity
+Photo trace was 86,000 anchors under the old limit; a noisier scan of the same size would have been
+refused. At 8,000,000 anchors a trace keeps about 0.7 GB, with a peak of about 0.9 GB while tracing.
+
+
+## Collapsed loops keep few segments
 A small closed loop (or a piece that returns to its own junction) whose fit collapsed to a single
 cubic cannot stay as one, so it kept every positioned point as a straight segment. A looser Paths
 collapses more loops, so it could give more segments than a tighter one. Such a loop now tries the
@@ -24,7 +54,6 @@ stays within 1.5 × max(tolerance, 0.5 px) of the points both ways: the fit at u
 tighter tolerances (what a slightly higher Paths gives); for a closed loop then two cubics split at
 its start and its farthest point, then the outline simplified at the tolerance and finer; the
 positioned points last, as before.
-
 Test on code-drawn images: `a_higher_paths_never_gives_fewer_segments` (32 seeded 48 px images of
 soft blobs in four colours plus pixel noise, Color and Black and White, Noise 1 and 3, segments at
 Paths 0, 25, 50, 75 and 100 must not fall). Before, six runs fell, e.g. 125 → 79 segments from
@@ -32,7 +61,6 @@ Paths 0 to 25 (seed 21, Color, Noise 1) and 71 → 63 → 52 from Paths 0 to 50
 White, Noise 3); now they are 75 → 79 and 41 → 48 → 52. One image (seed 16 in Black and White) still
 falls from 140 to 136 segments between Paths 0 and 25, before and after this change; that fall has
 another cause, still open, and the image is left out of the test. The crate's other tests pass unchanged.
-
 ## Notches read only their own piece
 Where the pixel at a sharp corner falls to the other colour, the outline cuts the corner in two
 one-pixel steps, and between two straight edges of three cracks or more those two steps become one
@@ -1212,6 +1240,7 @@ The remaining spur/extra-junction target is not met by this graph-only change.
 
 | date | change |
 |:--|:--|
+| 2026-10-17 | Images over 1500 px on a side trace with a warning; the anchor limit is 8,000,000 (2,000,000 on the web); time and memory of 2000 × 2000 to 6000 × 4000 code-drawn photos |
 | 2026-10-17 | `Raster::new` returns an error for RGBA bytes of the wrong length (it failed an assertion) and `Raster::pixel` reads nothing past the raster; traces of valid images unchanged |
 | 2026-10-17 | M12: maximal-disc graph pruning, split-crossing merges and degree-two joins; correct junction degrees 30→44/45 aa and hard, none missed; remaining spurs unchanged. Centre-lines rerun, scores and earlier tables unchanged. |
 | 2026-10-17 | M12: exact per-blob Euclidean distances and Guo–Hall thinning; centre-lines rerun on 46 inputs. Ends found: aa 638→682/688, hard 631→681/688. Whole-blob stroke/fill choice retained; preset/cost tables unchanged. |

docs/roadmap.md

@@ -1,6 +1,6 @@
 # Roadmap: milestones and what's next
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-17 · **Change:** minor (Image Trace: Raster::new returns an error for a buffer of the wrong length; M12 graph pruning and junction merging measured; M12 exact crop EDT and Guo–Hall thinning measured; M12 centre-lines baseline measured; scores and hours unchanged; Image Trace: a higher Paths never gives fewer segments on collapsed loops; Image Trace: the notch rule reads only its own piece; Image Trace: an edge's sub-pixel shift is the same from either side; Image Trace: a simpler contour walk with no precomputed direction table; transparency grid visibility saved in native documents, #1968; EPS editing data: legacy mesh corners, vector opacity masks and compound member paint retained; raster page comparison filters minification without relaxing limits; scores and hours unchanged; correction: M12's Image Trace quick presets leave the panel as it was, the Image Trace button opens it; batch exporting, #1935; G2: Effect › Sketch › Halftone Pattern; Photoshop filters 30/57, 27 remaining (22–38 h); Warp Options controls verified by focused checks and original-image review; estimates unchanged; existing-guide Escape cancellation validated 2026-10-14; scores and hours unchanged; open-path anchor Delete keeps surviving runs separate; estimates unchanged; PDF.R1: shared PDF reader with windowed content scanning and explicit incomplete-content errors; scores and estimates unchanged; PDF.W1: guarded shared PDF writer; output behavior, scores and estimates unchanged; Artboard tab-switch follow-up historically validated on `a0671777`; scores and hours unchanged; Artboard clean active-tab close/Delete follow-up validated 2026-10-15; later 2026-10-14 merges: per-corner radius, #1682; Width Point Edit from the Width tool, #1814, #1630; guides, #1782, #1836; anchor X/Y/W/H, #1824; toolbar and All Tools, #1751; macOS save sheets, #1855; rendering caches, #1667–#1792; untrusted files, #1852, #1862–#1873; failed-save dialog, #1685; Dim Images, #1683; estimates unchanged; M12 row: Image Trace's enhanced presets; verified PngSuite downloads, #1729; synthetic control-input budgets, #1709; 2026-10-14 merges: anchor Align and Distribute, #1636; Direct Selection and Delete fixes, #1674, #1666, #1743; Expand on repeats, #1756; file and input hardening, #1776–#1783, #1786, #1807; MCP limits and envelope, #1727, #1728; Image Trace #1647, #1657; estimates unchanged; later 2026-10-13 merges: SVG import, #1565, #1596, #1568, #1601; Warp Arc, #1578; Pathfinder strokes, #1570; saves, #1620 in part; OpenType features, #1607; intersect Smart Guides, #1602 in part; estimates unchanged; TIFF is available in Export for Screens and Asset Export with shared format settings; scores and hours unchanged; G1/M11: Artboard deletion and history selection normalization; history regressions and full workspace CI pass; scores and hours unchanged; Character styles retain explicit Auto leading, propagate resets and preserve local leading overrides; scores and hours unchanged; Width Point Edit: Shift-double-click enables adjoining adjustment; plain double-click keeps it off; scores and hours unchanged; per-corner radius fields with a link toggle, split from #1594; control transport deadlines, #1726; M12 row: Image Trace's presets and options as they are now; Polish interface, #1498; compact native saves, #1492; PDF and EPS paste as vector art, #1499; import fixes, #1528, #1530, #1531, #1544, #1551, #1553; guide objects, #1534; Join after Average, #1533; Keyboard Shortcuts, #1539; estimates unchanged; Direct Selection anchor precedence, #1508; dialog slider rails, #1483; template layers in Outline view, #1486; type that does not fit its frame is reported, #1471; 3D on outlined type, #1481; print-size images, #1517; French catalog, #1511; estimates unchanged; Split Into Grid options, #1462; Transform Objects and Reflect's angle, #1448 and #1460; Pathfinder on a group, #1450; unknown parameter keys refused, #1442; grayscale TIFFs with alpha, #1466 in part; estimates unchanged; M9: Extrude & Bevel, Inflate and Rotate; `.ai` compound path paint, #1410, overprint on import, #1388, text-only PDF parts, #1387; Transform dialogs preview, #1412, and transforms of direct-selected anchors, #1408; strokes wider than their shape, #1396; estimates unchanged; `.ai` editing-data follow-ups, #1390, #1391, #1392; dialog keyboard focus, #1367 and #1395; symbol instance redraw cache, #1386; font rescan, #1376; estimates unchanged; gradient shapes import as paths, #1304; white constant alpha masks, #1286 in part; Live Corners widget click, #1239; custom ruler origin, #1212; M11: Artboard object clicks create a fitted artboard (#1227); estimate unchanged; Pathfinder single-result source names and SVG IDs retained, #1293; DXF control-point SPLINE closure read, #1299 follow-up; desktop print transport adopts craft-print, Windows 7 fallback retained, scores unchanged; Czech render-site localization follow-up; Line truncated
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-17 · **Change:** minor (Image Trace: large images trace with a warning; anchor limit raised to 8,000,000; Image Trace: Raster::new returns an error for a buffer of the wrong length; M12 graph pruning and junction merging measured; M12 exact crop EDT and Guo–Hall thinning measured; M12 centre-lines baseline measured; scores and hours unchanged; Image Trace: a higher Paths never gives fewer segments on collapsed loops; Image Trace: the notch rule reads only its own piece; Image Trace: an edge's sub-pixel shift is the same from either side; Image Trace: a simpler contour walk with no precomputed direction table; transparency grid visibility saved in native documents, #1968; EPS editing data: legacy mesh corners, vector opacity masks and compound member paint retained; raster page comparison filters minification without relaxing limits; scores and hours unchanged; correction: M12's Image Trace quick presets leave the panel as it was, the Image Trace button opens it; batch exporting, #1935; G2: Effect › Sketch › Halftone Pattern; Photoshop filters 30/57, 27 remaining (22–38 h); Warp Options controls verified by focused checks and original-image review; estimates unchanged; existing-guide Escape cancellation validated 2026-10-14; scores and hours unchanged; open-path anchor Delete keeps surviving runs separate; estimates unchanged; PDF.R1: shared PDF reader with windowed content scanning and explicit incomplete-content errors; scores and estimates unchanged; PDF.W1: guarded shared PDF writer; output behavior, scores and estimates unchanged; Artboard tab-switch follow-up historically validated on `a0671777`; scores and hours unchanged; Artboard clean active-tab close/Delete follow-up validated 2026-10-15; later 2026-10-14 merges: per-corner radius, #1682; Width Point Edit from the Width tool, #1814, #1630; guides, #1782, #1836; anchor X/Y/W/H, #1824; toolbar and All Tools, #1751; macOS save sheets, #1855; rendering caches, #1667–#1792; untrusted files, #1852, #1862–#1873; failed-save dialog, #1685; Dim Images, #1683; estimates unchanged; M12 row: Image Trace's enhanced presets; verified PngSuite downloads, #1729; synthetic control-input budgets, #1709; 2026-10-14 merges: anchor Align and Distribute, #1636; Direct Selection and Delete fixes, #1674, #1666, #1743; Expand on repeats, #1756; file and input hardening, #1776–#1783, #1786, #1807; MCP limits and envelope, #1727, #1728; Image Trace #1647, #1657; estimates unchanged; later 2026-10-13 merges: SVG import, #1565, #1596, #1568, #1601; Warp Arc, #1578; Pathfinder strokes, #1570; saves, #1620 in part; OpenType features, #1607; intersect Smart Guides, #1602 in part; estimates unchanged; TIFF is available in Export for Screens and Asset Export with shared format settings; scores and hours unchanged; G1/M11: Artboard deletion and history selection normalization; history regressions and full workspace CI pass; scores and hours unchanged; Character styles retain explicit Auto leading, propagate resets and preserve local leading overrides; scores and hours unchanged; Width Point Edit: Shift-double-click enables adjoining adjustment; plain double-click keeps it off; scores and hours unchanged; per-corner radius fields with a link toggle, split from #1594; control transport deadlines, #1726; M12 row: Image Trace's presets and options as they are now; Polish interface, #1498; compact native saves, #1492; PDF and EPS paste as vector art, #1499; import fixes, #1528, #1530, #1531, #1544, #1551, #1553; guide objects, #1534; Join after Average, #1533; Keyboard Shortcuts, #1539; estimates unchanged; Direct Selection anchor precedence, #1508; dialog slider rails, #1483; template layers in Outline view, #1486; type that does not fit its frame is reported, #1471; 3D on outlined type, #1481; print-size images, #1517; French catalog, #1511; estimates unchanged; Split Into Grid options, #1462; Transform Objects and Reflect's angle, #1448 and #1460; Pathfinder on a group, #1450; unknown parameter keys refused, #1442; grayscale TIFFs with alpha, #1466 in part; estimates unchanged; M9: Extrude & Bevel, Inflate and Rotate; `.ai` compound path paint, #1410, overprint on import, #1388, text-only PDF parts, #1387; Transform dialogs preview, #1412, and transforms of direct-selected anchors, #1408; strokes wider than their shape, #1396; estimates unchanged; `.ai` editing-data follow-ups, #1390, #1391, #1392; dialog keyboard focus, #1367 and #1395; symbol instance redraw cache, #1386; font rescan, #1376; estimates unchanged; gradient shapes import as paths, #1304; white constant alpha masks, #1286 in part; Live Corners widget click, #1239; custom ruler origin, #1212; M11: Artboard object clicks create a fitted artboard (#1227); estimate unchanged; Pathfinder single-result source names and SVG IDs retained, #1293; DXF control-point SPLINE closure read, #1299 follow-up; desktop print transport adopts craft-print, WindowsLine truncated
 
 Forward-looking plan. Where VectorCraft stands is in [`ROADMAP.md`](../ROADMAP.md) and
 [target-app-parity.md](target-app-parity.md); the ranked work list is [gaps.md](gaps.md). Hours are Opus 5.5
@@ -64,7 +64,7 @@ Checked 2026-10-10 from the code, tests and open issues; no workflow fails, so V
 | M11 | Artboards & views (selected-set deletion shared by Artboards menu, trash and Properties, retaining artboard 1 when all are selected; Artboard deletion keys keep the first of an all-selected set and protect artwork; history prunes invalid indices while preserving valid multiselection (history tests and full workspace CI pass); click-to-fit objects with the Artboard tool (#1227), artboard escape routing and document setup modal handoff done; artboard panel/tool with Move Artwork for X/Y fields and Artboard Options, Trim View, middle-button pan, print tiling and the status bar's artboard navigator with synchronized Artboard tool selection done; multiple windows, presentation polish) | 🟡 | 15–25 |
 | M12 | Advanced color & art (CMYK/ICC, separations, Gradient Mesh, Live Paint, Image Trace, Graphs) | 🟡 Gradient Mesh, Live Paint, Image Trace (Create Strokes: exact crop EDT, Guo–Hall thinning and maximal-disc graph simplification; 15 presets, the 14 documented ones each with an enhanced version; Ignore Color, Shapes, Auto Grouping and Gradients options; measured in `image-trace-quality.md`; the Flat Logo mode places edges to a fraction of a pixel, restores sharp corners, snaps lines and circles, and refuses gradients), Recolor Artwork, colour management (ICC, soft proofing, separations preview), Graphs (all 9 tools, Graph Data/Type, group-selected series colours persist through regenerate/save/open) done; Graph Design and Marker designs, Transpose and Switch x/y, `|` label line breaks, the pie options, drop shadows, the legend across the top, overlapping widths, First Row/Column in Front, filled lines, kept label formatting and the Graph Data worksheet done; graph Column designs pending | 6–10 |
 | M13 | Automation (Actions ✅ record/playback, persisted; variables, scripting, batch) | 🟡 MCP `add_text` exposes existing vertical point, area and path type; broader scripting and batch work remains | 18–27 |
-| M12 | Advanced color & art (CMYK/ICC, separations, Gradient Mesh, Live Paint, Image Trace, Graphs) | 🟡 Gradient Mesh, Live Paint, Image Trace (junction-returning pieces retain their positioned boundaries; a simpler contour walk with identical output; an edge's sub-pixel shift is the same from either side; notches read only their own piece; collapsed loops keep few segments; quick presets reveal adjustment controls; Properties reopens them; tiny fitted contours retain islands and holes; 15 presets, the 14 documented ones each with an enhanced version; Ignore Color, Shapes, Auto Grouping and Gradients options; measured in `image-trace-quality.md`; closed outlines retain their interior after straightening; the Flat Logo mode places edges to a fraction of a pixel, restores sharp corners, snaps lines and circles, and refuses gradients), Recolor Artwork, colour management (ICC, soft proofing, separations preview), Graphs (all 9 tools, Graph Data/Type, group-selected series colours persist through regenerate/save/open) done; Graph Design and Marker designs, Transpose and Switch x/y, `|` label line breaks, the pie options, drop shadows, the legend across the top, overlapping widths, First Row/Column in Front, filled lines, kept label formatting and the Graph Data worksheet done; graph Column designs pending | 6–10 |
+| M12 | Advanced color & art (CMYK/ICC, separations, Gradient Mesh, Live Paint, Image Trace, Graphs) | 🟡 Gradient Mesh, Live Paint, Image Trace (junction-returning pieces retain their positioned boundaries; a simpler contour walk with identical output; an edge's sub-pixel shift is the same from either side; notches read only their own piece; collapsed loops keep few segments; large images trace with a warning; quick presets reveal adjustment controls; Properties reopens them; tiny fitted contours retain islands and holes; 15 presets, the 14 documented ones each with an enhanced version; Ignore Color, Shapes, Auto Grouping and Gradients options; measured in `image-trace-quality.md`; closed outlines retain their interior after straightening; the Flat Logo mode places edges to a fraction of a pixel, restores sharp corners, snaps lines and circles, and refuses gradients), Recolor Artwork, colour management (ICC, soft proofing, separations preview), Graphs (all 9 tools, Graph Data/Type, group-selected series colours persist through regenerate/save/open) done; Graph Design and Marker designs, Transpose and Switch x/y, `|` label line breaks, the pie options, drop shadows, the legend across the top, overlapping widths, First Row/Column in Front, filled lines, kept label formatting and the Graph Data worksheet done; graph Column designs pending | 6–10 |
 | M12 | Advanced color & art (CMYK/ICC, separations, Gradient Mesh, Live Paint, Image Trace, Graphs) | 🟡 Gradient Mesh, Live Paint, Image Trace (junction-returning pieces retain their positioned boundaries; quick presets trace at once and the Image Trace button opens the adjustment controls; tiny fitted contours retain islands and holes; 15 presets, the 14 documented ones each with an enhanced version; Ignore Color, Shapes, Auto Grouping and Gradients options; measured in `image-trace-quality.md`; closed outlines retain their interior after straightening; the Flat Logo mode places edges to a fraction of a pixel, restores sharp corners, snaps lines and circles, and refuses gradients), Recolor Artwork, colour management (ICC, soft proofing, separations preview), Graphs (all 9 tools, Graph Data/Type, group-selected series colours persist through regenerate/save/open) done; Graph Design and Marker designs, Transpose and Switch x/y, `|` label line breaks, the pie options, drop shadows, the legend across the top, overlapping widths, First Row/Column in Front, filled lines, kept label formatting and the Graph Data worksheet done; graph Column designs pending | 6–10 |
 | M13 | Automation (Actions ✅ record/playback, persisted; variables, scripting, batch) | 🟡 | 18–27 |
 | M14 | 1.0 polish (preferences, shortcut editor, workspaces, accessibility, packaging for all OSes) | 🟡 Numeric-field pointer selection and focus regression-tested (#1326, in part; short movements still select all); RPM runtime capabilities and glibc floor checked (#1275; real-distro install/start-up pending), Eyedropper cursor with precise-setting checks (#1269), Preferences, shortcut editor (chords with Shift and a punctuation key fire as typed; other apps' text shortcut sets imported), workspaces, a custom title bar on Windows/Linux with a Home button, content-sized dialogs, menus that scroll when longer than the window and macOS native menu dismissal done (M14.8), and native macOS save sheets with a Format menu (#866); an experimental, unsupported Windows 7 x64 portable OpenGL build (not verified by maintainers); accessibility and broader Windows/Linux packaging/QA pending | 18–28 |
@@ -87,6 +87,7 @@ M3 follow-up (#1968): native saves retain the per-document transparency grid set
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-17 | minor | Image Trace: images over 1500 px on a side trace normally with a warning that they are slower (as the public documentation describes), images over 64 MP say they were scaled down, and the memory guard is 8,000,000 anchors (2,000,000 on the web) instead of 2,000,000, measured at about 90 bytes an anchor. Scores and hours unchanged. |
 | 2026-10-17 | minor | Image Trace: `Raster::new` returns an error for RGBA bytes of the wrong length instead of failing an assertion, and `Raster::pixel` reads nothing past the raster; no behaviour change for valid images. Scores and hours unchanged. |
 | 2026-10-17 | minor | M12: maximal-disc pruning and junction merging, measured in the centre-lines class; whole-blob selection, scores and hours unchanged. |
 | 2026-10-17 | minor | M12: exact per-blob distances and Guo–Hall thinning preserve more stroke ends in the centre-lines class; whole-blob selection, scores and hours unchanged. |

docs/target-app-parity.md

@@ -1,6 +1,6 @@
 # Parity with Adobe Illustrator
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-17 · **Change:** minor (Image Trace: Raster::new returns an error for a buffer of the wrong length; M12 maximal-disc graph pruning and junction merging measured; M12 crop EDT and Guo–Hall thinning measured; M12 centre-lines baseline measured; scores and hours unchanged; installed plug-ins stay installed after a restart, #2541; Group Selection picks and moves one path of a compound path, #2441 in part; the Move dialog opens on the last move and its last checkboxes; Image Trace: a higher Paths never gives fewer segments on collapsed loops; Image Trace: the notch rule reads only its own piece; Image Trace: an edge's sub-pixel shift is the same from either side; Image Trace Flat Logo traces line art on white paper instead of a blank result; score and hours unchanged; Image Trace: a simpler contour walk with no precomputed direction table; transparency grid visibility saved in native documents, #1968; MCP cancellation, progress and busy answers during long exports, #2165, #2171, #2172; EPS editing data: legacy mesh corners, vector opacity masks and compound member paint retained; raster page comparison filters minification without relaxing limits; scores and hours unchanged; native family-name fallback from English-only typographic names, #2208; scores unchanged; batch exporting, #1935; G2: Effect › Sketch › Halftone Pattern; Photoshop filters 30/57, 27 remaining (22–38 h); G5: Symbol Options Export Type (Graphic / Movie Clip); Localization: Brazilian Portuguese complete under the tests, #1914, 71% → 74%; G6 image variables: Automation ~60% → ~62% / detail ~65% → ~68%, hours lowered; Warp Options controls verified by focused checks and original-image review; estimates unchanged; G11: Asset Export Art Optimized seam (#983 / #1037) and supersampled thumbs; Export for Screens 85% → 90%; existing-guide Escape cancellation validated 2026-10-14; scores and hours unchanged; open-path anchor Delete keeps surviving runs separate; estimates unchanged; PDF.R1: shared PDF reader with windowed content scanning and explicit incomplete-content errors; scores and estimates unchanged; PDF.W1: guarded shared PDF writer; output behavior, scores and estimates unchanged; Artboard tab-switch follow-up historically validated on `a0671777`; scores and hours unchanged; Artboard clean active-tab close/Delete follow-up validated 2026-10-15; later 2026-10-14 merges: anchor X/Y/W/H, #1824; Snap to Grid over Snap to Pixel, #1816; toolbar and All Tools, #1751; Actions panel selection, #1629 in part; redo during a drag, #1719; preferences written on OK, #1747; type in symbols after reopening, #1738; macOS save sheets, #1855, the Format menu withdrawn; stroke outlines shared, #1667; untrusted files, #1852, #1862–#1873; failed-save dialog, #1685; effects, #1864, Dim Images, #1683; duplicated rows of the 2026-10-05 table noted for the owner; scores unchanged; Image Trace: Shapes rework, stroke caps, enhanced presets, gradients over noise, measured in `image-trace-quality.md`, score unchanged; verified PngSuite downloads, #1729; synthetic control-input budgets, #1709; 2026-10-14 merges: anchor Align and Distribute, #1636; Direct Selection and Delete fixes, #1674, #1666, #1743; Escape while typing, #1686; Pen clicks, #1663; Expand on repeats, #1756; Roughen and Scribble, #1643, #1648; file and input hardening, #1776–#1783, #1786, #1807; MCP limits and envelope, #1727, #1728; Image Trace levelling and Flat Logo on scans, #1647, #1657; scores unchanged; later 2026-10-13 merges: SVG import, #1565, #1596, #1568, #1598, #1601; type on a path from PDF and `.ai`, #1585, #1586; ICC tag alignment, #1584; saves, #1620 in part; Warp Arc, #1578; Zig Zag, #1558; Pathfinder strokes, #1570; OpenType features, #1607; intersect Smart Guides, #1602 in part; a guide's position in the Transform panel, #1597 in part, a convenience with no parity claim; scores unchanged; TIFF is available in Export for Screens and Asset Export with shared format settings; scores and hours unchanged; G1/M11: Artboard deletion and history selection normalization; history regressions and full workspace CI pass; scores and hours unchanged; Character styles retain explicit Auto leading, propagate resets and preserve local leading overrides; scores and hours unchanged; Width Point Edit: Shift-double-click enables adjoining adjustment; plain double-click keeps it off; scores and hours unchanged; Units › Identify Objects By (`identifyObjectsBy`) acts on Layers, Variables and Layer Options, #394, scores unchanged; Appearance of Black › Printing / Exporting (`blackOutput`) acts on RGB raster export and Print as Bitmap, #394, scores unchanged; per-corner radius fields with a link toggle, split from #1594; control transport deadlines, #1726; Color panel: the mode picked last comes back after a restart, #1675; Image Trace: shared edges, memory, thin lines, strokes, corners, and the Shapes, Auto Grouping and GradieLine truncated
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-17 · **Change:** minor (Image Trace: large images trace with a warning; anchor limit raised to 8,000,000; Image Trace: Raster::new returns an error for a buffer of the wrong length; M12 maximal-disc graph pruning and junction merging measured; M12 crop EDT and Guo–Hall thinning measured; M12 centre-lines baseline measured; scores and hours unchanged; installed plug-ins stay installed after a restart, #2541; Group Selection picks and moves one path of a compound path, #2441 in part; the Move dialog opens on the last move and its last checkboxes; Image Trace: a higher Paths never gives fewer segments on collapsed loops; Image Trace: the notch rule reads only its own piece; Image Trace: an edge's sub-pixel shift is the same from either side; Image Trace Flat Logo traces line art on white paper instead of a blank result; score and hours unchanged; Image Trace: a simpler contour walk with no precomputed direction table; transparency grid visibility saved in native documents, #1968; MCP cancellation, progress and busy answers during long exports, #2165, #2171, #2172; EPS editing data: legacy mesh corners, vector opacity masks and compound member paint retained; raster page comparison filters minification without relaxing limits; scores and hours unchanged; native family-name fallback from English-only typographic names, #2208; scores unchanged; batch exporting, #1935; G2: Effect › Sketch › Halftone Pattern; Photoshop filters 30/57, 27 remaining (22–38 h); G5: Symbol Options Export Type (Graphic / Movie Clip); Localization: Brazilian Portuguese complete under the tests, #1914, 71% → 74%; G6 image variables: Automation ~60% → ~62% / detail ~65% → ~68%, hours lowered; Warp Options controls verified by focused checks and original-image review; estimates unchanged; G11: Asset Export Art Optimized seam (#983 / #1037) and supersampled thumbs; Export for Screens 85% → 90%; existing-guide Escape cancellation validated 2026-10-14; scores and hours unchanged; open-path anchor Delete keeps surviving runs separate; estimates unchanged; PDF.R1: shared PDF reader with windowed content scanning and explicit incomplete-content errors; scores and estimates unchanged; PDF.W1: guarded shared PDF writer; output behavior, scores and estimates unchanged; Artboard tab-switch follow-up historically validated on `a0671777`; scores and hours unchanged; Artboard clean active-tab close/Delete follow-up validated 2026-10-15; later 2026-10-14 merges: anchor X/Y/W/H, #1824; Snap to Grid over Snap to Pixel, #1816; toolbar and All Tools, #1751; Actions panel selection, #1629 in part; redo during a drag, #1719; preferences written on OK, #1747; type in symbols after reopening, #1738; macOS save sheets, #1855, the Format menu withdrawn; stroke outlines shared, #1667; untrusted files, #1852, #1862–#1873; failed-save dialog, #1685; effects, #1864, Dim Images, #1683; duplicated rows of the 2026-10-05 table noted for the owner; scores unchanged; Image Trace: Shapes rework, stroke caps, enhanced presets, gradients over noise, measured in `image-trace-quality.md`, score unchanged; verified PngSuite downloads, #1729; synthetic control-input budgets, #1709; 2026-10-14 merges: anchor Align and Distribute, #1636; Direct Selection and Delete fixes, #1674, #1666, #1743; Escape while typing, #1686; Pen clicks, #1663; Expand on repeats, #1756; Roughen and Scribble, #1643, #1648; file and input hardening, #1776–#1783, #1786, #1807; MCP limits and envelope, #1727, #1728; Image Trace levelling and Flat Logo on scans, #1647, #1657; scores unchanged; later 2026-10-13 merges: SVG import, #1565, #1596, #1568, #1598, #1601; type on a path from PDF and `.ai`, #1585, #1586; ICC tag alignment, #1584; saves, #1620 in part; Warp Arc, #1578; Zig Zag, #1558; Pathfinder strokes, #1570; OpenType features, #1607; intersect Smart Guides, #1602 in part; a guide's position in the Transform panel, #1597 in part, a convenience with no parity claim; scores unchanged; TIFF is available in Export for Screens and Asset Export with shared format settings; scores and hours unchanged; G1/M11: Artboard deletion and history selection normalization; history regressions and full workspace CI pass; scores and hours unchanged; Character styles retain explicit Auto leading, propagate resets and preserve local leading overrides; scores and hours unchanged; Width Point Edit: Shift-double-click enables adjoining adjustment; plain double-click keeps it off; scores and hours unchanged; Units › Identify Objects By (`identifyObjectsBy`) acts on Layers, Variables and Layer Options, #394, scores unchanged; Appearance of Black › Printing / Exporting (`blackOutput`) acts on RGB raster export and Print as Bitmap, #394, scores unchanged; per-corner radius fields with a link toggle, split from #1594; control transport deadlines, #1726; Color panel: the mode picked last comes back after a restart, #1675; Image Trace: shared edgLine truncated
 
 The authoritative parity assessment. [`ROADMAP.md`](../ROADMAP.md) summarizes it; [`gaps.md`](gaps.md) is
 the work list made from it. Deep areas have their own checklists: [UI and interaction](ui-parity.md),
@@ -82,6 +82,7 @@ dominate; 3D, graphs and automation are specialist). They sum to 105. Feature de
 | Symbols, blends, envelopes, Repeat, perspective | 5 | 87% | 30.7's Blend panel with ease in/out, dynamic symbols, symbol libraries, Start Global Edit, envelope Anti-Alias/Preserve Shape; Symbol Options › Registration, Export Type (Graphic / Movie Clip) and 9-slice guide settings (stored, not drawn) are done | 5–9 | estimated |
 | Image Trace, graphs, image tools | 3 | 75% | graph Column designs, Image Trace Create Strokes depth (Create Object Mosaic is done; junction-returning piece survival has source-generated regressions in `image-trace-quality.md`; simpler contour walk, identical output; an edge's sub-pixel shift is the same from either side; notches read only their own piece; collapsed loops keep few segments, so Paths is monotone on the code-drawn sweep) | 5–8 | estimated (raised from 72%); quick presets reveal adjustment controls, Properties reopens them |
 | Symbols, blends, envelopes, Repeat, perspective | 5 | 87% | 30.7's Blend panel with ease in/out, dynamic symbols, symbol libraries, Start Global Edit, envelope Anti-Alias/Preserve Shape; Symbol Options › Registration and Export Type (Graphic / Movie Clip) are done | 5–9 | estimated |
+| Image Trace, graphs, image tools | 3 | 75% | graph Column designs, Image Trace Create Strokes depth (Create Object Mosaic is done; junction-returning piece survival has source-generated regressions in `image-trace-quality.md`; large images trace with a warning) | 5–8 | estimated (raised from 72%); quick presets reveal adjustment controls, Properties reopens them |
 | Layers, artboards, document setup | 5 | 78% | Selected-artboard deletion is consistent across panel actions (all-selected retains artboard 1); history prunes removed indices while preserving valid multiselection; remaining:  30.0's artboard locking and colours and managing artboards from the canvas, Layers panel row context menus and Collect for Export (click-to-fit objects is done, #1227) | 5–8 | estimated (lowered from 82%: target moved); Artboard deletion keys keep artwork and the first of an all-selected set |
 | View & navigation | 3 | 70% | New View/Edit Views, multiple windows and Arrange, Snap to Glyph | 9–14 | estimated |
 | File formats | 6 | 75% | `.ai` files open with a flattened or wrong layer structure in real cases (#951), guides lost (#779), no writing of Illustrator's editing data (#868), FreeHand/CorelDRAW/DWG/HEIC/JPEG 2000 import, 3D export; see [file-format-parity.md](file-format-parity.md); EPS legacy mesh/opacity-mask and raster comparison follow-up verified | 10–20 | estimated (lowered from 85%: open issues); DXF control-point SPLINE import closure regression-tested (#1299 follow-up after #1320); PDF writer metadata, reader streaming and immutable backend checks in `crates/pdf/src/tests.rs`, `crates/pdf/src/tests_reader_streaming.rs` and `xtask/src/pdf_deps.rs` |
@@ -605,6 +606,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
 - **Transparency:** opacity masks (clip/invert/disable/link), exported as SVG `<mask>` and PDF soft masks. The constant alpha soft mask that PDF and `.ai` export draw a CMYK page with transparency through is white, so applications that read every soft mask by its luminosity show the page too (#1359, part of #1286).
   Disable, Enable, Unlink and Link Opacity Mask and Opacity Mask Options (`transparency.setOpacityMask`) record no undo step when every mask they act on already has the flags they set.
 - **Image Trace, thin closed outlines:** generated `fit::snap_area_tests` verify nonzero interiors after straightening, opposite closed-boundary winding and Noise controls; see [quality notes](image-trace-quality.md#thin-closed-outlines-with-snap-curves-to-lines). Scores and hours unchanged; open-piece fitting is unchanged.
+- **Image Trace, large images:** images over 1500 px on a side trace with a warning in the result and the status bar; the anchor limit is 8,000,000 (2,000,000 on the web), measured at about 90 bytes an anchor (see [quality notes](image-trace-quality.md#large-images)).
 - **Image Trace small contours:** closed fits too small to form an editable subpath retain their positioned outline, including holes. Source-generated island, hole/winding and stepped-region regressions cover Corners and Noise; defaults, parity scores and estimates are unchanged.
 - **Create Strokes baseline (2026-10-17, measured):** the ignored centre-lines class covers 23 exact code-drawn scenes in aa and hard variants, including junctions, crossings, fills meeting strokes and varying widths. [Baseline and metric definitions](image-trace-quality.md#centre-lines). Topology is recovered from emitted geometry; width-profile metrics remain unavailable. No behaviour change or score increase.
 - **Image Trace, collapsed loops keep few segments:** a loop whose fit collapses to one cubic keeps the fewest segments that hold its area and course, so a higher Paths gives no fewer segments; a code-drawn Paths sweep in `crates/trace` (see [quality notes](image-trace-quality.md#collapsed-loops-keep-few-segments)).
@@ -763,6 +765,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-17 | minor | Image Trace: images over 1500 px on a side trace normally with a warning that they are slower (as the public documentation describes), images over 64 MP say they were scaled down, and the memory guard is 8,000,000 anchors (2,000,000 on the web) instead of 2,000,000, measured at about 90 bytes an anchor. Scores and hours unchanged. |
 | 2026-10-17 | minor | Image Trace: `Raster::new` returns an error for RGBA bytes of the wrong length instead of failing an assertion, and `Raster::pixel` reads nothing past the raster; no behaviour change for valid images. Scores and hours unchanged. |
 | 2026-10-17 | minor | M12: maximal-disc graph pruning and junction merging; centre-lines degrees improve to 44/45 in each variant, remaining spurs unchanged. Scores, missing features and estimates unchanged. |
 | 2026-10-17 | minor | M12: exact per-blob EDT and Guo–Hall skeletons, with randomized EDT/active-set checks and preserved diagonal ends; centre-lines measurements updated. Scores and estimates unchanged. |