Export: the export commands' params and the MCP export tool list the .ai format

document.export, document.serialize and document.exportSelection write
a PDF-compatible .ai (format: "ai"), and document.formats lists ai as
writable, but none of their params texts named it. The params text of
document.exportSelection named only png, jpg, webp, svg, svgz and pdf,
although the command writes all 20 writable formats. The description
of the MCP export tool and its row in docs/mcp.md named every format
of the tool's format enum except ai, and the range text and the row
said that only PDF writes several artboards.

The three params texts now list every format their command writes,
and document.export's range and useArtboards texts name .ai beside
PDF. The MCP export tool's description names ai, and its artboard and
range texts say that .ai, like PDF, writes one page per artboard. The
range text and the row also say that SVG, SVGZ and EPS write one file
per chosen artboard, and that rasters, DXF, EMF and WMF do so with
options.useArtboards: true.

Docs: docs/mcp.md (the export tool).

crates/engine/src/cmd/fileio/mod.rs

@@ -106,7 +106,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Serialize Document",
             [],
             None,
-            "{format?: vectorcraft (default)|template|svg|svgz|pdf|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|tiff|bmp|tga|psd, …the format's options (see document.formats; SVG ones also as svg: {…}), selectedOnly?: false (the selected objects alone, in their layers)} → {text, warnings} for svg (plus dataBase64, the file, when its encoding isn't UTF-8), else {dataBase64, warnings}; an SVG of several artboards also gives files: [{name, text}], linked images linked: [{name, dataBase64}]",
+            "{format?: vectorcraft (default)|template|svg|svgz|pdf|ai|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|tiff|bmp|tga|psd, …the format's options (see document.formats; SVG ones also as svg: {…}), selectedOnly?: false (the selected objects alone, in their layers)} → {text, warnings} for svg (plus dataBase64, the file, when its encoding isn't UTF-8), else {dataBase64, warnings}; an SVG of several artboards also gives files: [{name, text}], linked images linked: [{name, dataBase64}]",
             has_doc,
             export::serialize
         ),
@@ -115,7 +115,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Export Document",
             [],
             None,
-            "{path?, format?: svg|svgz|pdf|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|tiff|bmp|tga|psd|vectorcraft|template (default: from the path's extension, else png; png8 writes an indexed .png), selectedOnly?: false (the selected objects alone, in their layers), artboard?: 0, artboards?: [i…], range?: \"1-3, 5\" | \"all\" (1-based; PDF writes one page per artboard, default all; SVG writes one file per artboard, {stem}-{artboard}.svg; raster formats write one artboard), useArtboards?: true (raster: one file per chosen artboard, default all, {stem}-{artboard}.{ext}; pdf: every page) | false (pdf/raster: the bounds of the visible art; SVG has it as an SVG option), ppi?: 72 (raster formats: pixels per inch, stored in the file; wins over scale), scale?: 1 (pixels per point), background?: transparent|white|black|\"#rrggbb\" (jpg: white when transparent), antiAlias?: none|art (default)|type (text snapped to pixels), interlaced?: false (png, Adam7), quality?: 90 (jpg: 0–100), colorModel?: rgb|cmyk|gray (jpg), method?: baseline|optimized|progressive, scans?: 3 (3–5, progressive), embedIcc?: true, imageMap?: none|client|server (an HTML or NCSA map of the objects with a URL, written as <stem>.html / <stem>.map), colors?: 256 (gif/png8: 2–256), reduction?: perceptual|selective (default)|adaptive|web|blackWhite|gray, dither?: none|diffusion (default)|pattern|noise, ditherAmount?: 100, transparency?: true, matte?: white|\"#rrggbb\"|none, interlaced?, lossless?: true (webp: lossy WebP isn't available yet: written lossless, with a warning), encoding?: utf8|utf16 (txt: the stories in stacking order, back to front, a thread once; utf16 with a byte order mark), lineEndings?: lf|crlf, selectionOnly?: false, svg?: {styling, outlineText, images, objectIds, decimals, minify, responsive, useArtboards, preserveEditing, metadata, fewerTspans, hiddenLayers, encoding, profile, embedFonts} (see document.formats), …the SVG options given flat instead, …the PDF options of document.exportPdf, …the DXF options of document.exportDxf (useArtboards: one drawing per artboard), …the EPS options of document.exportEps (useArtboards: one file per artboard, {stem}_{artboard}.eps; else the visible art), …emf and wmf write one picture of the artboard (useArtboards: true one file per chosen artboard, false the bounds of the visible art; EMF keeps curves, clipping, transparent images and gradients as images clipped to their shape; WMF flattens curves into polygons behind a placeable header; what a format leaves out comes back in warnings), colorModel?: rgb|cmyk|gray (tiff: rgb keeps transparency as an alpha channel), lzw?: true, byteOrder?: little|big, embedIcc?: true, colorModel?: rgb|gray (bmp), depth?: 24 (bmp: 1 black and white, 4|8 a palette by reduction and dither, 16, 24, 32 with alpha), fileFormat?: windows|os2 (1, 4, 8 or 24 bits), rle?: false (4 and 8 bits, windows), flipRows?: false (top-down rows), depth?: 24 (tga: 16 one-bit alpha, 24, 32 with alpha), colorModel?: rgb|cmyk|gray (psd), layers?: true (each top-level layer a pixel layer with its opacity and blend mode; a background colour is a Background layer; false: one flat image, on white), maxEditability?: false (layers and sublayers become groups, each object a layer named as in the Layers panel, text by its text; clipping, masked or knockout layers stay one layer), hiddenLayers?: false (hidden layers and objects written hidden instead of left out), embedIcc?: true (at most 30000 pixels a side; formats without alpha are flattened on white)} → {path, format, bytes, warnings, files?: [path…] (several), linked?: [path…] (linked images, image maps)}; no path → {dataBase64, format, bytes, warnings, files?: [{name, dataBase64}], linked?: [{name, dataBase64}]}. Never changes the document's path",
+            "{path?, format?: svg|svgz|pdf|ai|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|tiff|bmp|tga|psd|vectorcraft|template (default: from the path's extension, else png; png8 writes an indexed .png), selectedOnly?: false (the selected objects alone, in their layers), artboard?: 0, artboards?: [i…], range?: \"1-3, 5\" | \"all\" (1-based; PDF and .ai write one page per artboard, default all; SVG writes one file per artboard, {stem}-{artboard}.svg; raster formats write one artboard), useArtboards?: true (raster: one file per chosen artboard, default all, {stem}-{artboard}.{ext}; pdf/ai: every page) | false (pdf/ai/raster: the bounds of the visible art; SVG has it as an SVG option), ppi?: 72 (raster formats: pixels per inch, stored in the file; wins over scale), scale?: 1 (pixels per point), background?: transparent|white|black|\"#rrggbb\" (jpg: white when transparent), antiAlias?: none|art (default)|type (text snapped to pixels), interlaced?: false (png, Adam7), quality?: 90 (jpg: 0–100), colorModel?: rgb|cmyk|gray (jpg), method?: baseline|optimized|progressive, scans?: 3 (3–5, progressive), embedIcc?: true, imageMap?: none|client|server (an HTML or NCSA map of the objects with a URL, written as <stem>.html / <stem>.map), colors?: 256 (gif/png8: 2–256), reduction?: perceptual|selective (default)|adaptive|web|blackWhite|gray, dither?: none|diffusion (default)|pattern|noise, ditherAmount?: 100, transparency?: true, matte?: white|\"#rrggbb\"|none, interlaced?, lossless?: true (webp: lossy WebP isn't available yet: written lossless, with a warning), encoding?: utf8|utf16 (txt: the stories in stacking order, back to front, a thread once; utf16 with a byte order mark), lineEndings?: lf|crlf, selectionOnly?: false, svg?: {styling, outlineText, images, objectIds, decimals, minify, responsive, useArtboards, preserveEditing, metadata, fewerTspans, hiddenLayers, encoding, profile, embedFonts} (see document.formats), …the SVG options given flat instead, …the PDF options of document.exportPdf, …the DXF options of document.exportDxf (useArtboards: one drawing per artboard), …the EPS options of document.exportEps (useArtboards: one file per artboard, {stem}_{artboard}.eps; else the visible art), …emf and wmf write one picture of the artboard (useArtboards: true one file per chosen artboard, false the bounds of the visible art; EMF keeps curves, clipping, transparent images and gradients as images clipped to their shape; WMF flattens curves into polygons behind a placeable header; what a format leaves out comes back in warnings), colorModel?: rgb|cmyk|gray (tiff: rgb keeps transparency as an alpha channel), lzw?: true, byteOrder?: little|big, embedIcc?: true, colorModel?: rgb|gray (bmp), depth?: 24 (bmp: 1 black and white, 4|8 a palette by reduction and dither, 16, 24, 32 with alpha), fileFormat?: windows|os2 (1, 4, 8 or 24 bits), rle?: false (4 and 8 bits, windows), flipRows?: false (top-down rows), depth?: 24 (tga: 16 one-bit alpha, 24, 32 with alpha), colorModel?: rgb|cmyk|gray (psd), layers?: true (each top-level layer a pixel layer with its opacity and blend mode; a background colour is a Background layer; false: one flat image, on white), maxEditability?: false (layers and sublayers become groups, each object a layer named as in the Layers panel, text by its text; clipping, masked or knockout layers stay one layer), hiddenLayers?: false (hidden layers and objects written hidden instead of left out), embedIcc?: true (at most 30000 pixels a side; formats without alpha are flattened on white)} → {path, format, bytes, warnings, files?: [path…] (several), linked?: [path…] (linked images, image maps)}; no path → {dataBase64, format, bytes, warnings, files?: [{name, dataBase64}], linked?: [{name, dataBase64}]}. Never changes the document's path",
             has_doc,
             export::export
         ),
@@ -124,7 +124,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Export Selection…",
             ["File"],
             None,
-            "{path?, format?: png|jpg|webp|svg|svgz|pdf (default: from the extension, else png), scale?: 1, …the format's options} the selected objects cropped to their bounds (template layers left out) → {path, format, bytes, warnings, bounds} (no path → {dataBase64, format, bytes, warnings, bounds}); warnings say what the format approximated or left out, as for document.export",
+            "{path?, format?: png|jpg|webp|svg|svgz|pdf|ai|gif|png8|tiff|bmp|tga|psd|txt|dxf|eps|emf|wmf|vectorcraft|template (default: from the extension, else png), scale?: 1, …the format's options} the selected objects cropped to their bounds (template layers left out) → {path, format, bytes, warnings, bounds} (no path → {dataBase64, format, bytes, warnings, bounds}); warnings say what the format approximated or left out, as for document.export",
             has_selection,
             export::export_selection
         ),

crates/engine/src/cmd/fileio/tests.rs

@@ -236,6 +236,36 @@ fn formats_query_lists_readers_writers_and_options() {
     assert_eq!(r["openExtensions"].as_array().unwrap().len(), OPEN_EXTS.len());
 }
 
+/// The format ids `command`'s params text lists for `format` (`a|b (default)|c (…)`, up to the
+/// first comma), sorted.
+fn listed_formats(command: &str) -> Vec<String> {
+    let params = crate::cmd::find_command(command).unwrap().params;
+    let (_, rest) = params.split_once("format?: ").unwrap_or_else(|| panic!("{command} lists no formats"));
+    let list = rest.split(',').next().unwrap_or_default();
+    let mut ids: Vec<String> = list.split('|').filter_map(|f| f.split_whitespace().next()).map(str::to_string).collect();
+    ids.sort();
+    ids
+}
+
+/// The params texts of the commands that take any writable format list exactly the formats each
+/// command writes (.ai among them).
+#[test]
+fn export_params_list_every_format_the_command_writes() {
+    let mut s = session(100.0, 80.0, 1);
+    s.execute("shape.rectangle", &json!({"x": 10, "y": 10, "width": 50, "height": 40})).unwrap();
+    s.execute("select.all", &json!({})).unwrap();
+    for command in ["document.serialize", "document.export", "document.exportSelection"] {
+        let mut refused = vec![];
+        let mut written: Vec<String> = FORMATS
+            .iter()
+            .filter(|f| s.execute(command, &json!({"format": f.id})).map_err(|e| refused.push(format!("{}: {e}", f.id))).is_ok())
+            .map(|f| f.id.to_string())
+            .collect();
+        written.sort();
+        assert_eq!(listed_formats(command), written, "{command}; refused: {refused:?}");
+    }
+}
+
 #[test]
 fn ranges_parse_one_based() {
     assert_eq!(parse_range("1-3, 5", 5).unwrap(), [0, 1, 2, 4]);

crates/mcp/src/tests_exportas.rs

@@ -37,5 +37,10 @@ fn export_with_a_range_writes_one_file_per_artboard() {
     let r = text(&call_tool(&mut h, "export", &json!({"format": "jpg", "options": {"useArtboards": true}})));
     let names: Vec<&str> = r["files"].as_array().unwrap().iter().map(|f| f["name"].as_str().unwrap()).collect();
     assert_eq!(names, ["Untitled-1-Artboard-1.jpg", "Untitled-1-Artboard-2.jpg", "Untitled-1-Artboard-3.jpg"]);
+    // SVG, SVGZ and EPS write one file per artboard of a range without useArtboards.
+    for format in ["svg", "svgz", "eps"] {
+        let r = text(&call_tool(&mut h, "export", &json!({"format": format, "range": "1, 3"})));
+        assert_eq!(r["files"].as_array().map(Vec::len), Some(2), "{format}: {r}");
+    }
     let _ = std::fs::remove_dir_all(dir);
 }

crates/mcp/src/tests_fileio.rs

@@ -83,6 +83,11 @@ fn export_tool_lists_engine_formats_and_options() {
     for k in ["artboard", "range", "options"] {
         assert!(props.get(k).is_some(), "export takes {k}");
     }
+    // The description names every format of the enum.
+    let words: Vec<&str> = export["description"].as_str().unwrap().split(|c: char| !c.is_ascii_alphanumeric()).collect();
+    for f in props["format"]["enum"].as_array().unwrap() {
+        assert!(words.contains(&f.as_str().unwrap()), "{f}");
+    }
     let open = tools.iter().find(|t| t["name"] == "open_file").unwrap();
     assert!(open["description"].as_str().unwrap().contains(".ait"));
 }
@@ -138,6 +143,13 @@ fn exporting_native_keeps_the_document_path() {
     let pdf = text(&call_tool(&mut h, "export", &json!({"format": "pdf", "range": "2"})));
     let pdf = vectorcraft_format::base64_decode(pdf["dataBase64"].as_str().unwrap()).unwrap();
     assert_eq!(pdf_pages(&pdf), 1);
+    // An .ai export holds every artboard by default and one artboard with a range, and the document keeps its path.
+    for (args, pages) in [(json!({"format": "ai"}), 2), (json!({"format": "ai", "range": "2"}), 1)] {
+        let ai = text(&call_tool(&mut h, "export", &args));
+        assert_eq!(ai["format"], "ai");
+        assert_eq!(pdf_pages(&vectorcraft_format::base64_decode(ai["dataBase64"].as_str().unwrap()).unwrap()), pages, "{args}");
+    }
+    assert_eq!(h.session.doc().unwrap().path.as_deref(), Some(doc.as_str()));
 }
 
 fn pdf_pages(pdf: &[u8]) -> usize {

crates/mcp/src/tools.rs

@@ -332,14 +332,14 @@ pub fn tool_definitions() -> Vec<Value> {
         tool(
             "export",
             "Export",
-            "Export the active document with the engine's document.export (the same bytes in the app and headless), in any format of the `format` enum: vectors (svg/svgz with the artboard as viewBox, eps, dxf, emf, wmf), pdf (one page per artboard: all, or `artboard` / `range`), rasters (one rendered artboard: png, jpg, webp, gif, png8 as an indexed .png, tiff, bmp, tga, psd with its layers), txt (the stories, back to front), vectorcraft or template (a native copy or template; the document keeps its path). run_command document.formats lists each format's options. For SVG/SVGZ, top-level `outlineText: true` writes text as paths; DXF takes it too (its type is outlined anyway unless `preserve: editability`). PDF instead uses `options.advanced.outlineText: true`, default false (live text). `selection: true` exports only the selected objects, cropped to their bounds. Template layers are left out; live effects are kept (geometry baked, SVG filters for shadows/glows/blur). Without `path` the bytes come back as dataBase64.",
+            "Export the active document with the engine's document.export (the same bytes in the app and headless), in any format of the `format` enum: vectors (svg/svgz with the artboard as viewBox, eps, dxf, emf, wmf), pdf and ai (one page per artboard: all, or `artboard` / `range`; ai is the PDF-compatible .ai file that Save writes, which carries the document when every artboard is written in order), rasters (one rendered artboard: png, jpg, webp, gif, png8 as an indexed .png, tiff, bmp, tga, psd with its layers), txt (the stories, back to front), vectorcraft or template (a native copy or template; the document keeps its path). run_command document.formats lists each format's options. For SVG/SVGZ, top-level `outlineText: true` writes text as paths; DXF takes it too (its type is outlined anyway unless `preserve: editability`). PDF instead uses `options.advanced.outlineText: true`, default false (live text). `selection: true` exports only the selected objects, cropped to their bounds. Template layers are left out; live effects are kept (geometry baked, SVG filters for shadows/glows/blur). Without `path` the bytes come back as dataBase64.",
             obj(
                 json!({
                     "format": {"type": "string", "enum": FORMATS.iter().filter(|f| f.write).map(|f| f.id).collect::<Vec<_>>(), "description": "Default: from the path's extension"},
                     "path": string("Destination file (omit to get dataBase64)"),
                     "scale": num("Raster pixels per point (default 1)"),
-                    "artboard": {"type": "integer", "minimum": 0, "description": "0-based artboard (default: the first; PDF default: all)"},
-                    "range": string("1-based artboards such as \"1-3, 5\" (PDF: one page each; other formats take one)"),
+                    "artboard": {"type": "integer", "minimum": 0, "description": "0-based artboard (default: the first; PDF and .ai default: all)"},
+                    "range": string("1-based artboards such as \"1-3, 5\" (PDF and .ai: one page each; SVG, SVGZ and EPS: one file each; rasters, DXF, EMF and WMF: one, or one file each with options.useArtboards: true)"),
                     "selection": {"type": "boolean", "description": "Export only the selection, cropped to it"},
                     "outlineText": {"type": "boolean", "description": "SVG/SVGZ: true writes text as outlines (viewable without the fonts). DXF takes it too (type outlined anyway unless preserve: editability). PDF uses options.advanced.outlineText instead (default false: live text)"},
                     "options": {"type": "object", "description": "More format options, passed through (see run_command document.formats), e.g. {\"quality\": 80} for jpg or {\"advanced\": {\"outlineText\": true}} for PDF text as outlines (default false: live text)"},

docs/mcp.md

@@ -305,7 +305,7 @@ objects' fills or strokes differ (`fillMixed` / `strokeMixed`, drawn as a "?" pr
 | `screenshot` | `{path?, scale?, artboard?, window?}` | Returns MCP image content (`image/png`, base64) plus a text block. Renders the artboard; `window:true` captures the app window (remote only). With `path` the backend (the headless session or the app) writes the PNG there too. |
 | `open_file` | `{path}` | Opens any readable file as a new active document: `.vectorcraft`/`.drawcraft`, `.vctemplate`, `.svg`/`.svgz`, `.pdf`/`.ai`, `.ait`, `.eps`, `.dxf`, `.emf`, `.wmf`, PNG, JPEG, GIF, WebP, TIFF, BMP, PSD/PSB (an image opens as a document of its pixel size; a Photoshop file as its merged image). Templates (`.vctemplate`, `.ait`) open as a new untitled document. PDF, `.ai` and SVG files saved with Preserve Editing reopen as the document they carry. The reply is `document.open`'s: its `warnings` say what didn't come in as it was (an EPS whose PostScript can't be read opens as its preview, and the warning names the PostScript error, the operator and the procedure). `run_command document.formats` lists the formats. |
 | `save_file` | `{path?}` | Runs `document.save`: the document's own file in its own format (native `.vectorcraft` unless it was opened from or saved as SVG, PDF or a restorable `.ai`; then `warnings` say what that format loses). A path's extension picks the format (`.vectorcraft`, `.vctemplate`, `.pdf`, `.svg`, `.svgz`, `.ai`: a PDF carrying the native document, which reopens editable). |
-| `export` | `{path?, format?, scale?, artboard?, range?, selection?, outlineText?, options?}` | `svg`, `svgz`, `pdf`, `eps`, `dxf`, `emf`, `wmf`, `png`, `jpg`, `webp`, `gif`, `png8` (an indexed `.png`), `tiff`, `bmp`, `tga`, `psd` (layered), `txt` (the document's text), `vectorcraft` or `template` (a native template). The tool's `format` enum and `document.formats` list them, generated from the engine's format table. When `format` is omitted, it comes from the path's extension. PDF writes one page per artboard: all of them, or `artboard` (0-based) / `range` (`"1-3, 5"`, 1-based); the other formats write one artboard. `options` carries more format options (e.g. `{"quality": 80}` for JPEG). `selection: true` exports the selected objects cropped to their bounds (the reply adds their `bounds`, and reports `format` and the encoder's `warnings` as a whole-document export does); `outlineText: true` writes SVG text as paths. Template layers are left out, live effects are kept, and exporting `vectorcraft` never changes the document's path. Without `path` the bytes come back as `dataBase64`. Both backends run the same `document.export` call. |
+| `export` | `{path?, format?, scale?, artboard?, range?, selection?, outlineText?, options?}` | `svg`, `svgz`, `pdf`, `ai` (the PDF-compatible `.ai` that Save writes, which carries the document when every artboard is written in order), `eps`, `dxf`, `emf`, `wmf`, `png`, `jpg`, `webp`, `gif`, `png8` (an indexed `.png`), `tiff`, `bmp`, `tga`, `psd` (layered), `txt` (the document's text), `vectorcraft` or `template` (a native template). The tool's `format` enum and `document.formats` list them, generated from the engine's format table. When `format` is omitted, it comes from the path's extension. PDF and `.ai` write one page per artboard: all of them, or `artboard` (0-based) / `range` (`"1-3, 5"`, 1-based). SVG, SVGZ and EPS write one file per chosen artboard. Rasters, DXF, EMF and WMF write one artboard, or one file per chosen artboard with `options: {"useArtboards": true}`. `options` carries more format options (e.g. `{"quality": 80}` for JPEG). `selection: true` exports the selected objects cropped to their bounds (the reply adds their `bounds`, and reports `format` and the encoder's `warnings` as a whole-document export does); `outlineText: true` writes SVG text as paths. Template layers are left out, live effects are kept, and exporting `vectorcraft` never changes the document's path. Without `path` the bytes come back as `dataBase64`. Both backends run the same `document.export` call. |
 | `add_text` | `{text, x?, y?, width?, height?, fit?, fitMinPercent?, path?, mode?, pathEffect?, size?, font?, color?, justify?}` | Point type at (x, y) (`justify`: `left`, `center` or `right` starts, centres or ends each line on x); area type with `width`/`height` (`fit`: `none`, `autoHeight`, `shrinkText`, as `text.areaOptions`); or `path` + `mode` (`area`/`onPath`) to flow text in or along a path, with `pathEffect` (`rainbow`, `skew`, `3dRibbon`, `stairStep`, `gravity`); `justify` (also `auto`, `justifyAll`) aligns the paragraphs of every kind, as `text.setStyle` does later. Returns `{id}`, with `overflow: true` when the text doesn't fit its frame or path. |
 | `apply_effect` | `{effect?, params?, ids?}` | Appends a live effect. Without `effect`, returns the effect catalogue with parameters and defaults. |
 | `pathfinder` | `{operation, ids?}` | `unite`, `minusFront`, `intersect`, `exclude`, `divide`, `trim`, `merge`, `crop`, `outline`, `minusBack`. For a live version, apply the `pathfinder.*` effect to a group (`effect.apply` groups several loose selected objects first). |