M1: node.get reports layer data (pluginData) (#879)

Layer data written with node.set {props: {pluginData}} was saved but no
command read it back. node.get (the command, the control method and MCP
get_node) and document.inspect now report pluginData as {key: value}
when a layer or page has any, so a tool keeping state in a file can
read it on its next run. Widget keys are included: the plugin rules
only stop plugins writing them, and widget.list already reports that
state.

ROADMAP.md

@@ -316,6 +316,7 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
 
 | Date | Change | Summary |
 |---|---|---|
+| 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 |
 | 2026-10-17 | 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. |

crates/engine/src/inspect.rs

@@ -165,6 +165,10 @@ pub fn node_json(doc: &Document, id: NodeId, depth: usize) -> Value {
             o.insert("operandOperation".into(), json!(op));
         }
     }
+    // Layer data written with `node.set {props: {pluginData}}` (pages too).
+    if !n.plugin_data.is_empty() {
+        o.insert("pluginData".into(), json!(n.plugin_data));
+    }
     match &n.kind {
         NodeKind::Text(t) => {
             o.insert("characters".into(), json!(t.characters));

crates/engine/src/lib.rs

@@ -1775,6 +1775,8 @@ mod pixel_preview_tests;
 #[cfg(test)]
 mod playground_tests;
 #[cfg(test)]
+mod plugin_data_tests;
+#[cfg(test)]
 mod plugin_directory_tests;
 #[cfg(test)]
 mod plugin_panels_tests;

crates/engine/src/plugin_data_tests.rs

@@ -0,0 +1,30 @@
+//! Layer data (`pluginData`) reads back through `node.get` and `document.inspect` (#879): what
+//! `node.set` writes on a layer or a page comes back as `{key: value}`, a removed key goes, and a
+//! layer without any reports none.
+
+use crate::Session;
+use crate::components::tests::{ex, idv};
+use serde_json::json;
+
+#[test]
+fn node_get_reports_the_layer_data_node_set_wrote() {
+    let mut s = Session::new();
+    let f = idv(&ex(&mut s, "frame.create", json!({"x": 0, "y": 0, "width": 100, "height": 100})));
+    let r = idv(&ex(&mut s, "shape.rectangle", json!({"x": 0, "y": 0, "width": 10, "height": 10})));
+    let page = s.ds().unwrap().page;
+    assert!(ex(&mut s, "node.get", json!({"id": f})).get("pluginData").is_none(), "no data, no field");
+    ex(&mut s, "node.set", json!({"ids": [f], "props": {"pluginData": {"com.example.sync": "{\"v\":1}", "n": 2}}}));
+    ex(&mut s, "node.set", json!({"ids": [page], "props": {"pluginData": {"com.example.sync": "page"}}}));
+    let got = ex(&mut s, "node.get", json!({"id": f}))["pluginData"].clone();
+    assert_eq!(got, json!({"com.example.sync": "{\"v\":1}", "n": "2"}), "values read back as the strings stored");
+    assert_eq!(ex(&mut s, "node.get", json!({"id": page}))["pluginData"], json!({"com.example.sync": "page"}), "pages keep data too");
+    assert!(ex(&mut s, "node.get", json!({"id": r})).get("pluginData").is_none(), "other layers report none");
+    // The document tree reports it as well (the page and its children).
+    let tree = crate::inspect::document(&s, 2, false);
+    assert_eq!(tree["pages"][0]["pluginData"], json!({"com.example.sync": "page"}));
+    // A null removes a key; undo brings it back.
+    ex(&mut s, "node.set", json!({"ids": [f], "props": {"pluginData": {"n": null}}}));
+    assert_eq!(ex(&mut s, "node.get", json!({"id": f}))["pluginData"], json!({"com.example.sync": "{\"v\":1}"}));
+    ex(&mut s, "edit.undo", json!({}));
+    assert_eq!(ex(&mut s, "node.get", json!({"id": f}))["pluginData"]["n"], "2");
+}

docs/control-protocol.md

@@ -131,7 +131,9 @@ component/instance links, overrides, `slot` (a slot layer's property name), boun
 `devStatus` (handoff status), `devChanged` (changed since it was marked ready for dev),
 `annotations` (Dev Mode notes: `[{label, properties, category?}]`), `codeLinks` (a component's
 links to code: `[{language, importPath, name, template}]`), `devResources` (links for developers,
-its own and inherited: `[{name, url, index?, from?}]`). The auto layout props
+its own and inherited: `[{name, url, index?, from?}]`), `pluginData` (layer data written with
+`node.set {props: {pluginData: {key: value}}}`, pages included: `{key: value}`, values as strings;
+only when there is some). The auto layout props
 that `node.set` accepts are listed in [mcp.md](mcp.md#conventions-agents-must-know).
 
 ### `ui.inspect {}`

docs/mcp.md

@@ -299,7 +299,7 @@ Or in a project's `.mcp.json`:
 | `create_node {type, x, y, width, height, parent, index, name, text, path, props}` | Create a frame, rectangle, ellipse, polygon, star, line, arrow, text, vector, section, component or slice; returns `{id, node}`. |
 | `set_properties {ids, props}` | `node.set` on layers (geometry, fills, strokes, effects, corner radius, auto layout, sizing, constraints, masks (`isMask`, `maskType: alpha\|vector\|luminance`), handoff status (`devStatus: none\|readyForDev\|completed`; marking again clears "Changed"), a section's `sectionContentsHidden`, text…); returns the updated layers. |
 | `inspect_document {depth, allPages}` | The document as JSON (layer tree, styles, selection, history). |
-| `get_node {id, depth}` | One layer as JSON. |
+| `get_node {id, depth}` | One layer as JSON; `pluginData` (`{key: value}`, values as strings) when the layer or page has layer data written with `set_properties {props: {pluginData}}`. |
 | `select {ids}` | Replace the selection (`[]` deselects). |
 | `export {ids, format, scale \| size, path?, bleed?, cropMarks?, bleedMarks?, cmyk?, contentsOnly?, includeBoundingBox?, svgOutlineText?, svgIdAttribute?, svgSimplifyStroke?}` | png, jpg, svg, webp, pdf, or `fig`: the whole file as `.fig`, experimental (see Exporting `.fig` files below); `size` is `2x`, `512w` or `512h`. The image covers what the layers paint (shadows towards their offset, strokes, unclipped children, a mask group's mask; hidden layers take no room; a slice is its area with everything under it); `contentsOnly: false` also draws every other layer showing in that area, `includeBoundingBox` exports the layers' own boxes; SVG: `svgOutlineText: false` keeps `<text>`, `svgIdAttribute` writes unique ids from layer names, `svgSimplifyStroke: false` writes every stroke as an outline. The same options go in export settings (`export.add` / `export.update`). PDF: frames one page each (sized in points), anything else together on one page; print options: `bleed` (points or a length like `"3mm"`, `"0.125in"`), crop and bleed marks, CMYK colour (see Exports below), also taken by `file.export`, `file.exportLayers`, `file.exportFramesPdf` and stored per export setting by `export.add` / `export.update`; `run_command` `file.exportFramesPdf {page?, path?}` writes every top-level frame of a page. Without `path`, images come back as MCP image content, SVG as text. Layers' own export settings: `run_command` with `export.add` / `export.update {index, size?, suffix?, format?}` / `export.remove` and `file.exportLayers {ids?, dir?, assets?}` (every layer once per setting, named `<layer><suffix>.<format>`, a slash in a layer name making a folder; `assets: true` exports the Inspect tab's assets instead: icons as SVG, images as PNG). |
 | `screenshot {ids?, scale?, maxSize?, window?}` | PNG of the page (with background) or of layers, scaled to fit `maxSize` (default 1600). `window: true` captures the app window in front when attached, a window id (see Windows below) that window. |

docs/plugins.md

@@ -460,4 +460,6 @@ import what you need from `figcraft`.
   vectors, components or variables).
 - Panels: no images, sliders or free layout inside a panel.
 - Data in the document: plugins keep data on layers (pages included) with `node.set {props:
-  {pluginData: {key: value}}}`; there is no separate per-document store.
+  {pluginData: {key: value}}}` (a `null` value removes a key) and read it back with `node.get`, which
+  reports `pluginData: {key: value}` (values as strings) when a layer has any; there is no separate
+  per-document store.

docs/target-app-parity.md

@@ -111,7 +111,7 @@ Breadth: does it exist. Ready: depth, correctness and fidelity for real projects
 | 15 | Dev Mode / inspect | 2 | 96% | 72% | Import lines for connected instances inside generated layer trees; an editor extension is left to the MCP server (inspect behaviour suite with colour formats, rem and icon and image assets, code connect, plugins in Dev Mode and dev resources links landed) ([dev-mode-parity](dev-mode-parity.md)) | 0–1 |
 | 16 | Comments, versions, find, misc | 3 | 87% | 63% | Comments are local only; comparing two versions; branches in live sessions; text runs and other lists besides fills, strokes and effects merge whole (branches with review and merge, their own version history and per-item list merges, and a comments and version history behaviour suite from the documentation landed) | 1–3 |
 | 17 | Multiplayer & sharing | 8 | 17% | 5% | Core landed (`crates/collab`: ids, change sets, server ordering, convergence tested); live sessions (preview): WebSocket transport, hosting from the desktop app, joining from the app or the browser, invite links that open the app, cursors, selections and follow, cursor chat and spotlight, per-person undo, offline resume; a self-hosted `figcraft-server` with persistence and share links to edit or view, which can be open to the public (owner tokens, limits per address, expiry, moderation). Left: accounts and teams, audio ([collaboration-parity](collaboration-parity.md)) | 42–84 |
-| 18 | Plugins & widgets | 4 | 60% | 35% | Own sandboxed WASM plugins landed (#101: manifest, permissions, menu, Run last, Manage, SDK), with log byte/count limits checked before allocation and host forwarding ([logging limits](plugins.md#logging-limits)), plugin panels called back per button or changed value and per-plugin settings (ABI v2), then widgets (API 3: plugin-drawn layers on the canvas with state kept in the document, redrawn on clicks; a Counter example), panels side by side and a colour picker for plugin colour fields, then a plugin directory on `figcraft-server` (publish with the server key, browse, install after a permissions confirmation, hash-checked downloads, updates by version). Left: a public catalogue, publisher accounts and signatures, ratings, background update checks, the directory in the browser; widgets take clicks only (no text input, property menus, hover or timers) and draw frames, text, shapes and images only; Figma's plugins are JavaScript and don't run (a JS engine would be an owner decision) ([plugins.md](plugins.md)) | 8–26 |
+| 18 | Plugins & widgets | 4 | 60% | 35% | Own sandboxed WASM plugins landed (#101: manifest, permissions, menu, Run last, Manage, SDK), with log byte/count limits checked before allocation and host forwarding ([logging limits](plugins.md#logging-limits)), plugin panels called back per button or changed value and per-plugin settings (ABI v2), then widgets (API 3: plugin-drawn layers on the canvas with state kept in the document, redrawn on clicks; a Counter example), panels side by side and a colour picker for plugin colour fields, then a plugin directory on `figcraft-server` (publish with the server key, browse, install after a permissions confirmation, hash-checked downloads, updates by version); layer data written with `node.set {props: {pluginData}}` reads back through `node.get` (#879). Left: a public catalogue, publisher accounts and signatures, ratings, background update checks, the directory in the browser; widgets take clicks only (no text input, property menus, hover or timers) and draw frames, text, shapes and images only; Figma's plugins are JavaScript and don't run (a JS engine would be an owner decision) ([plugins.md](plugins.md)) | 8–26 |
 | 19 | Team libraries & organization | 2 | 70% | 40% | Libraries kept on `figcraft-server` under their file and enabled by a share link (per-asset versions, background update checks, overrides kept), usage counts per component and file, swapping a library by names. Left: team-wide library lists, accounts and permissions, analytics over time, pushed update notices | 4–8 |
 | 20 | Figma Draw extras | 2 | 88% | 60% | Have: variable width, lasso, shape builder, noise/texture, text on a path, pattern fills, stretch and scatter brushes, pen pressure (Windows pens, browser styluses), multi-edit (several vector layers in edit mode at once). Missing: pressure from macOS/Linux tablets | 1–3 |
 | 21 | AI features | 3 | 0% | 0% | First draft, rename layers, image edit/remove background, visual search, Make: needs local models (owner decision) | 30–60 |
@@ -638,6 +638,7 @@ Carried over from the ROADMAP's "Shipped so far" (2026-10-10). The test count th
 
 | Date | Change | Summary |
 |---|---|---|
+| 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 |
 | 2026-10-17 | minor | Menu breadth re-run with `cargo xtask parity`: 212 / 212 (100%; the catalog gained View ▸ Full screen with #227 on 2026-10-14), 561 commands. Rows for the 2026-10-17 landings: import/export (area 14) and the file formats dimension name the `.fig` import's new fidelity (instance identity, overrides by key, text style precedence, grid tracks, slots, connector labels, per-point joins, text on a path, image adjustments, list start numbers, vertical trim), budgets from the file's size, the import report, a `.fig` copy from Save as and paste from another design app; the localization evidence takes the re-measured catalog counts (2,272 entries, drafts at 95–99%, Indonesian and Czech drafts, Swedish and Turkish catalogs); the Automation line adds control requests answered while the window is minimised (#720); batch #753's Selection colors, smart-selection spacing, Present tab and auto layout on empty frames are in ui-parity, prototyping-parity and auto-layout-parity. Numbers unchanged: every `.fig` and paste change is checked on synthetic files or clipboard HTML made from our own export, and real files are what gap 1's blocker and the file-exchange discounts wait for; the UI changes (menus, the Actions palette, editor fixes) are not compared side by side, so UI/UX stays at 58%; the localization grade and hours stay (Indonesian's draft is offset by the drafts' new gaps) |
 | 2026-10-17 | minor | Automation roots (M8, #715, #481): `figcraft-cli mcp --automation-read-root DIR --automation-write-root DIR` (each repeatable, existing folders) and the desktop app with the same flags confine every file a command reads to the read and write roots and every file it writes to the write roots; paths are resolved (links followed, `..`, Windows `\\?\` and UNC paths, case) and compared by whole folder names, anything else is an ordinary error. The engine reaches the file system through one module (enforced by `crates/engine/clippy.toml`), and a sweep runs every command with paths outside the roots. `--attach` refuses the flags (the app confines itself); `ui.screenshot` and `ui.render` return PNG data without a `path`, so the attached MCP server writes no temporary files. 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. |