diff --git a/crates/engine/src/cmd/fileio.rs b/crates/engine/src/cmd/fileio.rs
index 9154ce7ee5..d20c6c46b2 100644
--- a/crates/engine/src/cmd/fileio.rs
+++ b/crates/engine/src/cmd/fileio.rs
@@ -123,7 +123,7 @@ mod formats;
 
 #[cfg(not(target_arch = "wasm32"))]
 pub(crate) use access::list_dir;
-pub use access::{write_file_with, write_save_file, write_save_file_with};
+pub use access::{check_linked_scripts, write_file_with, write_save_file, write_save_file_with};
 
 #[cfg(all(test, not(target_arch = "wasm32")))]
 mod tests_readonly;
diff --git a/crates/engine/src/cmd/fileio/access.rs b/crates/engine/src/cmd/fileio/access.rs
index 6488972d31..203a2262b0 100644
--- a/crates/engine/src/cmd/fileio/access.rs
+++ b/crates/engine/src/cmd/fileio/access.rs
@@ -121,6 +121,24 @@ pub(crate) fn naming_in_message(msg: &str, path: &str, name: &str) -> String {
     out
 }
 
+/// The error for an SVG of a document that links a JavaScript file outside the read roots.
+pub(crate) const SCRIPT_OUTSIDE: &str = "a linked JavaScript file is outside the read roots";
+
+/// `cmd` may write `st`'s document in format `format` (a format id): any format but SVG and SVGZ,
+/// and those too unless read roots are in force and the document links a JavaScript file outside
+/// them (`svg_scripts`, a relative path taken from the document's folder; a URL is not checked),
+/// which the file's `<script>` element would name. The error names no file or folder.
+pub fn check_linked_scripts(cmd: &str, format: &str, st: &crate::DocState) -> Result<()> {
+    if !matches!(format, "svg" | "svgz") || crate::file_access::current().is_none() {
+        return Ok(());
+    }
+    let doc_path = st.path.as_deref();
+    if st.doc.svg_scripts.iter().any(|f| crate::cmd::links::script_hidden(f, doc_path)) {
+        return Err(bad(cmd, SCRIPT_OUTSIDE));
+    }
+    Ok(())
+}
+
 /// `path` checked for writing against the automation roots in force.
 #[cfg(not(target_arch = "wasm32"))]
 pub(crate) fn may_write(path: &str) -> Result<()> {
diff --git a/crates/engine/src/cmd/fileio/commands.rs b/crates/engine/src/cmd/fileio/commands.rs
index 5abe3e879c..28e12c115d 100644
--- a/crates/engine/src/cmd/fileio/commands.rs
+++ b/crates/engine/src/cmd/fileio/commands.rs
@@ -27,7 +27,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Serialize Document",
             [],
             None,
-            "{format?: vectorcraft (default)|template|svg|svgz|pdf|ai|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|hpgl|tiff|bmp|tga|psd (ait, a .ait template, is written by file.saveAsTemplate), …the format's options (see document.formats; SVG ones also as svg: {…}), selectedOnly?: false (the selected objects alone, in the layers and groups that hold them; an object of a blend, envelope, repeat or intertwine on its own)} → {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}]. A key no format takes, and an unknown key inside a PDF or EPS option's object, are refused; a key only another format takes is not used, and warnings name it",
+            "{format?: vectorcraft (default)|template|svg|svgz|pdf|ai|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|hpgl|tiff|bmp|tga|psd (ait, a .ait template, is written by file.saveAsTemplate), …the format's options (see document.formats; SVG ones also as svg: {…}), selectedOnly?: false (the selected objects alone, in the layers and groups that hold them; an object of a blend, envelope, repeat or intertwine on its own)} → {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}]. A key no format takes, and an unknown key inside a PDF or EPS option's object, are refused; a key only another format takes is not used, and warnings name it. Under automation read roots, svg and svgz are refused while the document links a JavaScript file outside them (svgInteractivity; a URL is not checked)",
             has_doc,
             export::serialize
         ),
@@ -36,7 +36,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Export Document",
             [],
             None,
-            "{path?, format?: svg|svgz|pdf|ai|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|hpgl|tiff|bmp|tga|psd|vectorcraft|template (default: from the path's extension, else png; png8 writes an indexed .png; ait, a .ait template, is written by file.saveAsTemplate; an exporter plug-in's format is plugin.<plug-in id>, which an extension only it lists picks too), params?: {…} (an exporter plug-in's parameters; missing ones take their defaults, see plugin.info), selectedOnly?: false (the selected objects alone, in the layers and groups that hold them; an object of a blend, envelope, repeat or intertwine on its own), includeArtboardFill?: true (raster, PDF, SVG and EPS draw each exported artboard's background color behind its art, a transparent background too; false leaves it out), artboard?: 0, artboards?: [i…], rect?: [x, y, width, height] (raster formats: that area of the page in points, y down, instead of an artboard; not with artboard, artboards, range or useArtboards), 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; pdf/ai: without editing data, with a warning, and ai refuses pdfCompatible: false; SVG has it as an SVG option), ppi?: number (raster formats: pixels per inch, stored in the file; wins over scale; without either, the document's raster effects resolution), scale?: number (pixels per point), background?: transparent|white|black|\"#rrggbb\" (jpg: white when transparent; #rrggbbaa and #rgba are refused here and in matte), antiAlias?: none|art (default)|type (text snapped to pixels), interlaced?: false (png, Adam7), embedIcc?: true (png: an sRGB chunk marks the colours as sRGB), 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, variableData} (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, after a central {stem}.eps of the whole document when there are two or more and art shows; 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), …hpgl writes a plot of the artboard as pen moves for plotters and cutters (each visible path once along its line in plotter units; useArtboards: true one file per chosen artboard, false the bounds of the visible art), hpglVersion?: hpgl (default: IN, SP, PU, PD) | hpgl2 (also NP and PC pen colors, each pen's paths as one encoded polyline PE), curveTolerance?: 0.1 (points, 0.01 to 10), pens?: [\"#rrggbb\"…] (pen 1 first, up to 255; each path takes the nearest; default a pen per color in the order the art first draws in it, numbered alike in every file), origin?: bottomLeft (default) | center, sortPaths?: false (each pen's next path the nearest), insideFirst?: false (a path after the pen's paths that lie inside it), 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}]}. A key no format takes, and an unknown key inside a PDF or EPS option's object, are refused; a key only another format takes is not used, and warnings name it. Never changes the document's path",
+            "{path?, format?: svg|svgz|pdf|ai|png|jpg|webp|gif|png8|txt|dxf|eps|emf|wmf|hpgl|tiff|bmp|tga|psd|vectorcraft|template (default: from the path's extension, else png; png8 writes an indexed .png; ait, a .ait template, is written by file.saveAsTemplate; an exporter plug-in's format is plugin.<plug-in id>, which an extension only it lists picks too), params?: {…} (an exporter plug-in's parameters; missing ones take their defaults, see plugin.info), selectedOnly?: false (the selected objects alone, in the layers and groups that hold them; an object of a blend, envelope, repeat or intertwine on its own), includeArtboardFill?: true (raster, PDF, SVG and EPS draw each exported artboard's background color behind its art, a transparent background too; false leaves it out), artboard?: 0, artboards?: [i…], rect?: [x, y, width, height] (raster formats: that area of the page in points, y down, instead of an artboard; not with artboard, artboards, range or useArtboards), 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; pdf/ai: without editing data, with a warning, and ai refuses pdfCompatible: false; SVG has it as an SVG option), ppi?: number (raster formats: pixels per inch, stored in the file; wins over scale; without either, the document's raster effects resolution), scale?: number (pixels per point), background?: transparent|white|black|\"#rrggbb\" (jpg: white when transparent; #rrggbbaa and #rgba are refused here and in matte), antiAlias?: none|art (default)|type (text snapped to pixels), interlaced?: false (png, Adam7), embedIcc?: true (png: an sRGB chunk marks the colours as sRGB), 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, variableData} (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, after a central {stem}.eps of the whole document when there are two or more and art shows; 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), …hpgl writes a plot of the artboard as pen moves for plotters and cutters (each visible path once along its line in plotter units; useArtboards: true one file per chosen artboard, false the bounds of the visible art), hpglVersion?: hpgl (default: IN, SP, PU, PD) | hpgl2 (also NP and PC pen colors, each pen's paths as one encoded polyline PE), curveTolerance?: 0.1 (points, 0.01 to 10), pens?: [\"#rrggbb\"…] (pen 1 first, up to 255; each path takes the nearest; default a pen per color in the order the art first draws in it, numbered alike in every file), origin?: bottomLeft (default) | center, sortPaths?: false (each pen's next path the nearest), insideFirst?: false (a path after the pen's paths that lie inside it), 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}]}. A key no format takes, and an unknown key inside a PDF or EPS option's object, are refused; a key only another format takes is not used, and warnings name it. Under automation read roots, svg and svgz are refused while the document links a JavaScript file outside them (svgInteractivity; a URL is not checked). Never changes the document's path",
             has_doc,
             export::export
         ),
@@ -45,7 +45,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Export Selection…",
             ["File"],
             None,
-            "{path?, format?: png|jpg|webp|svg|svgz|pdf|ai|gif|png8|tiff|bmp|tga|psd|txt|dxf|eps|emf|wmf|hpgl|vectorcraft|template (default: from the extension, else png), ppi?: number (raster formats: pixels per inch, stored in the file; wins over scale; without either, the document's raster effects resolution), scale?: number (pixels per point), …the format's options} the selected objects (template layers left out), each in the layers and groups that hold it, whose clipping paths, opacity masks, effects, opacity and blend modes apply as on the canvas (an object of a blend, envelope, repeat or intertwine on its own; txt: the selected type alone), cropped to the bounds the renderer measures for that art (a clip group by its clip) → {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. A key no format takes, and an unknown key inside a PDF or EPS option's object, are refused; a key only another format takes is not used, and warnings name it",
+            "{path?, format?: png|jpg|webp|svg|svgz|pdf|ai|gif|png8|tiff|bmp|tga|psd|txt|dxf|eps|emf|wmf|hpgl|vectorcraft|template (default: from the extension, else png), ppi?: number (raster formats: pixels per inch, stored in the file; wins over scale; without either, the document's raster effects resolution), scale?: number (pixels per point), …the format's options} the selected objects (template layers left out), each in the layers and groups that hold it, whose clipping paths, opacity masks, effects, opacity and blend modes apply as on the canvas (an object of a blend, envelope, repeat or intertwine on its own; txt: the selected type alone), cropped to the bounds the renderer measures for that art (a clip group by its clip) → {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. A key no format takes, and an unknown key inside a PDF or EPS option's object, are refused; a key only another format takes is not used, and warnings name it. Under automation read roots, svg and svgz are refused while the document links a JavaScript file outside them, as document.export refuses them",
             has_selection,
             export::export_selection
         ),
@@ -54,7 +54,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Export for Screens",
             ["File", "Export"],
             None,
-            "{folder?, zip?: false (one .zip of every file, each deflated or stored, whichever is smaller: no folder → {name, dataBase64, bytes, files: [name…]}; with a folder it is written there → {path, bytes, files}), artboard?: index | artboards?: [index…] | range?: \"1-3\" (default all), assets?: [asset id…] (instead of artboards: each asset's art alone, cropped to its bounds and named after the asset; see assets.list), layers?: [layer id…] (instead of artboards: each layer's art alone, sublayers included, named after the layer), selection?: one|each (instead of artboards: the selected art as one file, or a file per selected object, named after it), fullDocument?: false (one file per format instead: a PDF of every artboard, other formats the bounds of all visible art, named after the document), includeBleed?: false (artboards grown by the document's bleed), includeArtboardFill?: true (Include Artboard Fill: each artboard's background color behind its art; false leaves it out), pdfs?: multiple|single (Export PDFs As: with several artboards, single writes them as the pages of one PDF per PDF row, named after the document), exportPreset?: (a preset of document.exportPresets.list: its settings, under these params), subfolders?: false (each row's files in a sub-folder: its folder, else its size for raster (1x, 2x, 100w…) or its format (SVG, PDF)), folders?: none|rows (as subfolders)|format (a folder per extension: png, svg, pdf…)|item (a folder per artboard, asset, layer or object)|itemFormat (item/extension) (default: rows with subfolders or a preset, else none), name?: (a file name pattern instead of the item's name, with <filename> for the document, <name> for the artboard, asset, layer or object, <index> from 1, #### for the counter zero-padded to the run of #, <format>, <scale>, <suffix> (else the row's suffix ends the name), YYYYMMDD, YYYY-MM-DD, YYYY, <date>, <time>, <YYYY>, <MM>, <DD>, <hh>, <mm> and <ss>; a trailing .ext is dropped, as in `COMPANY-Logo-<filename>-####-YYYYMMDD`; different files it names alike get -2, -3…), counterStart?: 1, counterPer?: item (every file of an item has its number)|file, date?: YYYY-MM-DD (the date the pattern uses; default today, UTC), preset?: mobile (PNG 1x, 2x, 3x) | density (PNG 0.75x–4x in ldpi…xxxhdpi sub-folders) instead of formats (turns subfolders on), formats?: [{format: png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft, scale?: 1 | \"2x\" | \"100w\" | \"100h\" | \"72ppi\", width?: px | height?: px | ppi? (raster only; width, then height, then ppi win over scale), suffix?: (raster default: @2x, @100w, @100h, none at 1x; vector formats drop size suffixes), folder?: (its sub-folder), quality?: (jpg 0–100), …the format's options (antiAlias, background, preset (pdf)…)}], settings?: {png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft: {…options for every row of that format}} (rows' own options win), prefix?, antiAlias?: none|art|type (raster rows without their own), openLocation?: (remembered; the app shows the files after exporting)} one file per artboard and format (a PDF holds its artboard alone; artboards with the same name, in any case, get -2, -3…; an unnamed one is Artboard-N; a row whose file would take a name another row's file has, in any case, gets -2, -3… too, and identical rows write one file; row folders that differ only in case are one folder, spelled as the first row spells it) → {files: [path…]} (into the folder of exportPreset, outside the automation read roots: no ZIP path, and files relative to that folder); no folder → {files: [{name, dataBase64}]} (names include sub-folders: 2x/Icon@2x.png); every reply has warnings: [the encoders' warnings for the files, each once: an image that couldn't be decoded, type written in the fallback font…]. eps, ai and vectorcraft rows write a document of the item alone (its one artboard). The params (but zip and assets) are remembered in the document (document.exportSettings; not an undo step). A key it doesn't take, a key no format takes in a format row or in settings, settings for a format it doesn't write, and an unknown key inside a PDF, EPS or SVG option's object, are refused",
+            "{folder?, zip?: false (one .zip of every file, each deflated or stored, whichever is smaller: no folder → {name, dataBase64, bytes, files: [name…]}; with a folder it is written there → {path, bytes, files}), artboard?: index | artboards?: [index…] | range?: \"1-3\" (default all), assets?: [asset id…] (instead of artboards: each asset's art alone, cropped to its bounds and named after the asset; see assets.list), layers?: [layer id…] (instead of artboards: each layer's art alone, sublayers included, named after the layer), selection?: one|each (instead of artboards: the selected art as one file, or a file per selected object, named after it), fullDocument?: false (one file per format instead: a PDF of every artboard, other formats the bounds of all visible art, named after the document), includeBleed?: false (artboards grown by the document's bleed), includeArtboardFill?: true (Include Artboard Fill: each artboard's background color behind its art; false leaves it out), pdfs?: multiple|single (Export PDFs As: with several artboards, single writes them as the pages of one PDF per PDF row, named after the document), exportPreset?: (a preset of document.exportPresets.list: its settings, under these params), subfolders?: false (each row's files in a sub-folder: its folder, else its size for raster (1x, 2x, 100w…) or its format (SVG, PDF)), folders?: none|rows (as subfolders)|format (a folder per extension: png, svg, pdf…)|item (a folder per artboard, asset, layer or object)|itemFormat (item/extension) (default: rows with subfolders or a preset, else none), name?: (a file name pattern instead of the item's name, with <filename> for the document, <name> for the artboard, asset, layer or object, <index> from 1, #### for the counter zero-padded to the run of #, <format>, <scale>, <suffix> (else the row's suffix ends the name), YYYYMMDD, YYYY-MM-DD, YYYY, <date>, <time>, <YYYY>, <MM>, <DD>, <hh>, <mm> and <ss>; a trailing .ext is dropped, as in `COMPANY-Logo-<filename>-####-YYYYMMDD`; different files it names alike get -2, -3…), counterStart?: 1, counterPer?: item (every file of an item has its number)|file, date?: YYYY-MM-DD (the date the pattern uses; default today, UTC), preset?: mobile (PNG 1x, 2x, 3x) | density (PNG 0.75x–4x in ldpi…xxxhdpi sub-folders) instead of formats (turns subfolders on), formats?: [{format: png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft, scale?: 1 | \"2x\" | \"100w\" | \"100h\" | \"72ppi\", width?: px | height?: px | ppi? (raster only; width, then height, then ppi win over scale), suffix?: (raster default: @2x, @100w, @100h, none at 1x; vector formats drop size suffixes), folder?: (its sub-folder), quality?: (jpg 0–100), …the format's options (antiAlias, background, preset (pdf)…)}], settings?: {png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft: {…options for every row of that format}} (rows' own options win), prefix?, antiAlias?: none|art|type (raster rows without their own), openLocation?: (remembered; the app shows the files after exporting)} one file per artboard and format (a PDF holds its artboard alone; artboards with the same name, in any case, get -2, -3…; an unnamed one is Artboard-N; a row whose file would take a name another row's file has, in any case, gets -2, -3… too, and identical rows write one file; row folders that differ only in case are one folder, spelled as the first row spells it) → {files: [path…]} (into the folder of exportPreset, outside the automation read roots: no ZIP path, and files relative to that folder); no folder → {files: [{name, dataBase64}]} (names include sub-folders: 2x/Icon@2x.png); every reply has warnings: [the encoders' warnings for the files, each once: an image that couldn't be decoded, type written in the fallback font…]. eps, ai and vectorcraft rows write a document of the item alone (its one artboard). The params (but zip and assets) are remembered in the document (document.exportSettings; not an undo step). A key it doesn't take, a key no format takes in a format row or in settings, settings for a format it doesn't write, and an unknown key inside a PDF, EPS or SVG option's object, are refused. Under automation read roots, an svg or svgz row is refused, before the folder is made or any file is written, while the document links a JavaScript file outside them, as document.export refuses it",
             has_doc,
             screens::export_for_screens
         ),
diff --git a/crates/engine/src/cmd/fileio/export.rs b/crates/engine/src/cmd/fileio/export.rs
index 1ae96c6f81..d8af86802f 100644
--- a/crates/engine/src/cmd/fileio/export.rs
+++ b/crates/engine/src/cmd/fileio/export.rs
@@ -12,7 +12,8 @@ use crate::DocState;
 use super::super::{Result, Session, bad, check_switches, edit, number_or, switch_or, text_param};
 use super::encode::single_artboard;
 use super::{
-    ARTBOARD_PARAMS, Format, default_name, encode_all, encode_with_warnings, merge, with_black_output, writable, write_encoded, write_or_return,
+    ARTBOARD_PARAMS, Format, check_linked_scripts, default_name, encode_all, encode_with_warnings, merge, with_black_output, writable, write_encoded,
+    write_or_return,
 };
 
 /// The keys the export commands take for every format, beside the path, the format and the
@@ -53,6 +54,7 @@ pub fn unused_option_notes(cmd: &str, f: &Format, p: &Value) -> Vec<String> {
 
 pub(super) fn serialize(s: &mut Session, p: &Value) -> Result<Value> {
     let f = writable("document.serialize", Some(text_param(p, "format", "document.serialize")?.unwrap_or("vectorcraft")), None)?;
+    check_linked_scripts("document.serialize", f.id, s.doc()?)?;
     let unused = unused_option_notes("document.serialize", f, p);
     let expanded = expand_presets(s, "document.serialize", p)?;
     let p = with_black_output(s, &expanded);
@@ -96,6 +98,7 @@ pub(super) fn export(s: &mut Session, p: &Value) -> Result<Value> {
         super::check_not_lossy_overwrite(s.doc()?, path, p, "document.export")?;
     }
     let f = writable("document.export", text_param(p, "format", "document.export")?, path)?;
+    check_linked_scripts("document.export", f.id, s.doc()?)?;
     let unused = unused_option_notes("document.export", f, p);
     let expanded = expand_presets(s, "document.export", p)?;
     let p = with_black_output(s, &expanded);
@@ -355,6 +358,7 @@ pub(super) fn export_selection(s: &mut Session, p: &Value) -> Result<Value> {
         super::check_not_lossy_overwrite(s.doc()?, path, p, C)?;
     }
     let f = writable(C, text_param(p, "format", C)?, path)?;
+    check_linked_scripts(C, f.id, s.doc()?)?;
     let unused = unused_option_notes(C, f, p);
     let expanded = expand_presets(s, C, p)?;
     let p = with_black_output(s, &expanded);
diff --git a/crates/engine/src/cmd/fileio/save.rs b/crates/engine/src/cmd/fileio/save.rs
index 0a306ee1a9..e56f6467a1 100644
--- a/crates/engine/src/cmd/fileio/save.rs
+++ b/crates/engine/src/cmd/fileio/save.rs
@@ -822,6 +822,7 @@ pub(crate) fn job_for(s: &Session, st: &DocState, plan: SavePlan) -> Result<Save
 
 fn job_for_stamped(s: &Session, st: &DocState, plan: SavePlan, stamped: Option<i64>) -> Result<SaveJob> {
     let cmd = plan.mode.command();
+    super::check_linked_scripts(cmd, plan.format.id, st)?;
     let mut own = doc_to_save(st, plan.format);
     // The file the document is saved as (else its own) titles it if New's name is all it has.
     let file = plan.path.as_deref().filter(|_| plan.retargets()).or(st.path.as_deref());
@@ -1238,7 +1239,7 @@ pub(super) fn specs() -> Vec<CommandSpec> {
             "Save Document",
             [],
             None,
-            "{path?, format?: vectorcraft|template|pdf|svg|svgz|ai|eps (default: the path's extension, else the document's own format), options?: {…the format's options, see file.formatOptions; default: as last saved}, svg?: {…SVG options} (an SVG save keeps hidden layers, display:none, unless hiddenLayers is false), …the SVG and PDF options given flat instead (an option given flat or in svg and in options with different values is an error), compress?: bool (native, also in options: gzip; default: the useCompression preference; warnings say when the format doesn't read compress, version, preview or precision given flat, or a key given in options), version?: 4 (3, 2 or 1: for older VectorCraft versions; 1 and 2 are never compressed), preview?: false (embed a PNG of the first artboard, at most 256 px), precision?: 0..9 (native: round path anchors and handles to this many decimal places, a smaller file; colors, transforms and type stay exact; default: exact, and a later save without it writes exactly again), separateArtboards?: false (native and .ai: also save each artboard of `range` to <name>-<artboard>.<ext> beside the file, holding that artboard and the art touching it; the result's files lists every file written), range?: \"1-3, 5\"|\"all\" (default; with separateArtboards), includeLinked?: false (keep linked files' own pixels, not just their previews; they stay linked), embedProfiles?: true (carry the ICC profiles loaded from files that the document is tagged with; opening the file installs them where missing), pdfCompatible?: true (native: also carry a PDF of every artboard; false omits it) | true for .ai (false: blank pages, only the native document; a .ai file's compress, default true, is its compression.compressText), modified?: Unix seconds|null (the File Info modified date, and created date when there is none, a save to a file stamps; default now, recorded in the journal so a replay matches; null: leave the dates)} → {path, format, bytes, warnings, files?: [path…] (the file and its artboards' files), linked?: [path…] (images an SVG links to)}. Save writes one artboard, except a .ai file and EPS (below): a .ai file is a PDF-compatible file of every artboard carrying the native document (preserveEditing always on; PDF options flat or in options), which document.open restores exactly, on the active artboard (the app's, else the one the document opened on; with editingData: false, the first); separateArtboards writes more files, one per artboard. EPS takes the options of document.exportEps: by default one file whose bounding box fits the visible art (the first artboard when no art shows), carrying the whole editable document; useArtboards: true (also when artboard, artboards or range names artboards; file.formatOptions then reports it true) makes the chosen artboard the page, drawn with its background color (without Use Artboards, only the first artboard's page when no art shows has its color), and with two or more chosen the file at the path is the central file of the visible art (again the first artboard when none shows) and each artboard is also written to <name>_<artboard>.eps beside it, holding that artboard; selectedOnly is refused; its PostScript appearance flattens transparency, as EPS requires. Without a path it writes the document's own file in its own format: a document opened from or saved as SVG/PDF/EPS saves as that again (warnings name what the format loses). No path known (never saved, converted from an older version, restored by Data Recovery, or another format) → {dataBase64, format, name, folder?, warnings} and the document stays modified. Under automation read roots, a reply leaves out the document's own file outside them when no path is given (files and linked then name the files by their file names), and a suggested folder outside them. A key that no save format takes, beside the path or in options, and an unknown key inside a PDF option's object or svg, are refused. A terminal filesystem permission/read-only refusal returns READ_ONLY_LOCATION: followed by the reason; recovery-copy failures keep their original error. Non-UI callers never open a save panel",
+            "{path?, format?: vectorcraft|template|pdf|svg|svgz|ai|eps (default: the path's extension, else the document's own format), options?: {…the format's options, see file.formatOptions; default: as last saved}, svg?: {…SVG options} (an SVG save keeps hidden layers, display:none, unless hiddenLayers is false), …the SVG and PDF options given flat instead (an option given flat or in svg and in options with different values is an error), compress?: bool (native, also in options: gzip; default: the useCompression preference; warnings say when the format doesn't read compress, version, preview or precision given flat, or a key given in options), version?: 4 (3, 2 or 1: for older VectorCraft versions; 1 and 2 are never compressed), preview?: false (embed a PNG of the first artboard, at most 256 px), precision?: 0..9 (native: round path anchors and handles to this many decimal places, a smaller file; colors, transforms and type stay exact; default: exact, and a later save without it writes exactly again), separateArtboards?: false (native and .ai: also save each artboard of `range` to <name>-<artboard>.<ext> beside the file, holding that artboard and the art touching it; the result's files lists every file written), range?: \"1-3, 5\"|\"all\" (default; with separateArtboards), includeLinked?: false (keep linked files' own pixels, not just their previews; they stay linked), embedProfiles?: true (carry the ICC profiles loaded from files that the document is tagged with; opening the file installs them where missing), pdfCompatible?: true (native: also carry a PDF of every artboard; false omits it) | true for .ai (false: blank pages, only the native document; a .ai file's compress, default true, is its compression.compressText), modified?: Unix seconds|null (the File Info modified date, and created date when there is none, a save to a file stamps; default now, recorded in the journal so a replay matches; null: leave the dates)} → {path, format, bytes, warnings, files?: [path…] (the file and its artboards' files), linked?: [path…] (images an SVG links to)}. Save writes one artboard, except a .ai file and EPS (below): a .ai file is a PDF-compatible file of every artboard carrying the native document (preserveEditing always on; PDF options flat or in options), which document.open restores exactly, on the active artboard (the app's, else the one the document opened on; with editingData: false, the first); separateArtboards writes more files, one per artboard. EPS takes the options of document.exportEps: by default one file whose bounding box fits the visible art (the first artboard when no art shows), carrying the whole editable document; useArtboards: true (also when artboard, artboards or range names artboards; file.formatOptions then reports it true) makes the chosen artboard the page, drawn with its background color (without Use Artboards, only the first artboard's page when no art shows has its color), and with two or more chosen the file at the path is the central file of the visible art (again the first artboard when none shows) and each artboard is also written to <name>_<artboard>.eps beside it, holding that artboard; selectedOnly is refused; its PostScript appearance flattens transparency, as EPS requires. Without a path it writes the document's own file in its own format: a document opened from or saved as SVG/PDF/EPS saves as that again (warnings name what the format loses). No path known (never saved, converted from an older version, restored by Data Recovery, or another format) → {dataBase64, format, name, folder?, warnings} and the document stays modified. Under automation read roots, a reply leaves out the document's own file outside them when no path is given (files and linked then name the files by their file names), and a suggested folder outside them; an svg or svgz save (a document whose own format is SVG or SVGZ included) is refused, before any file is written, while the document links a JavaScript file outside them (svgInteractivity; a URL is not checked), also by file.saveAs and file.saveCopy. A key that no save format takes, beside the path or in options, and an unknown key inside a PDF option's object or svg, are refused. A terminal filesystem permission/read-only refusal returns READ_ONLY_LOCATION: followed by the reason; recovery-copy failures keep their original error. Non-UI callers never open a save panel",
             has_doc,
             |s, p| save(s, SaveMode::Save, p)
         ),
diff --git a/crates/engine/src/cmd/fileio/screens.rs b/crates/engine/src/cmd/fileio/screens.rs
index 91f43cfd36..dcf3d6c9ae 100644
--- a/crates/engine/src/cmd/fileio/screens.rs
+++ b/crates/engine/src/cmd/fileio/screens.rs
@@ -1030,6 +1030,10 @@ pub(crate) fn export(s: &mut Session, p: &Value) -> Result<Value> {
     o.one_source()?;
     // `<filename>`: the document's file, as Save names it, or its title before it is saved.
     let st = s.doc()?;
+    // Before the folder is made or any row is written.
+    for r in &rows {
+        super::check_linked_scripts(C, r.format.id, st)?;
+    }
     let naming = Naming::of(&o, st.path.as_deref().unwrap_or(&st.doc.title))?;
     let selection = o.selection_mode()?;
     let selected = if selection.is_some() { selected_artwork(s)? } else { vec![] };
diff --git a/crates/engine/src/tests/interactivity.rs b/crates/engine/src/tests/interactivity.rs
index 6f3878f9c9..dadc4c21c6 100644
--- a/crates/engine/src/tests/interactivity.rs
+++ b/crates/engine/src/tests/interactivity.rs
@@ -253,3 +253,91 @@ fn events_and_files_survive_a_native_round_trip_and_reach_svg() {
     assert!(svg.contains(" onclick=\"show(&quot;menu&quot;) &amp;&amp; x &lt; 1\""), "{svg}");
     assert!(svg.contains("<script xlink:href=\"menu.js\"/>"), "{svg}");
 }
+
+/// A caller confined to read roots: every SVG and SVGZ output of a document that links a
+/// JavaScript file outside them is refused before a file or folder is written, with an error that
+/// names no file or folder, and the document keeps the link.
+#[test]
+fn confined_svg_output_refuses_a_linked_javascript_file_outside_the_read_roots() {
+    let away = crate::tests_links::Folder::new("svg-script-away");
+    let home = crate::tests_links::Folder::new("svg-script-home");
+    let script = away.file("menu.js");
+    let mut s = session();
+    let a = rect(&mut s, 10.0);
+    run(&mut s, "svgInteractivity.addFile", json!({"file": script}));
+    run(&mut s, "assets.add", json!({"ids": [a.0]}));
+    let roots = crate::file_access::AutomationRoots::new(&[&home.0], &[&home.0]).unwrap().unwrap();
+    let hidden = [away.0.to_string_lossy().into_owned(), home.0.to_string_lossy().into_owned(), "menu.js".to_string()];
+    let refused = |s: &mut Session, cmd: &str, p: Value| {
+        let e = crate::file_access::confine(Some(&roots), || s.execute(cmd, &p)).expect_err(cmd).to_string();
+        assert!(e.contains("a linked JavaScript file is outside the read roots"), "{cmd} {p}: {e}");
+        for h in &hidden {
+            assert!(!e.contains(h.as_str()), "{cmd} {p} names {h}: {e}");
+        }
+    };
+    let out = home.file("out");
+    for format in ["svg", "svgz"] {
+        let file = |name: &str| home.file(&format!("{name}.{format}"));
+        refused(&mut s, "document.serialize", json!({"format": format}));
+        refused(&mut s, "document.export", json!({"format": format}));
+        refused(&mut s, "document.export", json!({"format": format, "path": file("export")}));
+        refused(&mut s, "document.export", json!({"format": format, "selectedOnly": true}));
+        refused(&mut s, "document.exportSelection", json!({"format": format, "path": file("selection")}));
+        refused(&mut s, "document.save", json!({"path": file("save")}));
+        refused(&mut s, "file.saveAs", json!({"format": format, "path": file("save-as")}));
+        refused(&mut s, "file.saveCopy", json!({"format": format, "path": file("copy")}));
+        refused(&mut s, "document.exportForScreens", json!({"folder": out, "formats": [{"format": "png"}, {"format": format}]}));
+        refused(&mut s, "document.exportForScreens", json!({"zip": true, "formats": [{"format": format}]}));
+        refused(&mut s, "assets.export", json!({"folder": out, "formats": [{"format": format}]}));
+    }
+    // A document saved as SVG saves as SVG again without a path: its file is left as it was.
+    let own = home.file("own.svg");
+    run(&mut s, "file.saveAs", json!({"path": own}));
+    let before = std::fs::read(&own).unwrap();
+    rect(&mut s, 50.0);
+    refused(&mut s, "document.save", json!({}));
+    assert_eq!(std::fs::read(&own).unwrap(), before);
+    let written: Vec<_> = std::fs::read_dir(&home.0).unwrap().map(|e| e.unwrap().file_name()).collect();
+    assert_eq!(written, ["own.svg"]);
+    assert_eq!(s.doc().unwrap().doc.svg_scripts, [script]);
+}
+
+/// A confined caller's SVG keeps every linked JavaScript file it may read, as stored: a file inside
+/// the read roots, a path relative to the document's folder that leads inside them, and a URL. A
+/// caller without roots writes a file outside them too.
+#[test]
+fn svg_output_keeps_linked_javascript_files_a_caller_may_read() {
+    let away = crate::tests_links::Folder::new("svg-script-kept-away");
+    let home = crate::tests_links::Folder::new("svg-script-kept-home");
+    let inside = home.file("menu.js");
+    let url = "https://example.com/scripts/menu.js";
+    let mut s = session();
+    rect(&mut s, 10.0);
+    for file in [inside.as_str(), "lib/tools.js", url] {
+        run(&mut s, "svgInteractivity.addFile", json!({"file": file}));
+    }
+    run(&mut s, "file.saveAs", json!({"path": home.file("doc.vectorcraft")}));
+    let roots = crate::file_access::AutomationRoots::new(&[&home.0], &[&home.0]).unwrap().unwrap();
+    let svg = |s: &mut Session, format: &str| {
+        let r = crate::file_access::confine(Some(&roots), || s.execute("document.serialize", &json!({"format": format}))).unwrap();
+        match r["text"].as_str() {
+            Some(text) => text.to_string(),
+            None => {
+                let bytes = vectorcraft_format::base64_decode(r["dataBase64"].as_str().unwrap()).unwrap();
+                assert!(vectorcraft_svg::is_svgz(&bytes), "gzip magic");
+                vectorcraft_svg::text_of(&bytes).unwrap().into_owned()
+            }
+        }
+    };
+    for format in ["svg", "svgz"] {
+        let text = svg(&mut s, format);
+        for file in [inside.as_str(), "lib/tools.js", url] {
+            assert!(text.contains(&format!("<script xlink:href=\"{file}\"/>")), "{format} {file}: {text}");
+        }
+    }
+    // Without roots, a file outside them is written as stored.
+    let outside = away.file("menu.js");
+    run(&mut s, "svgInteractivity.addFile", json!({"file": outside}));
+    let text = run(&mut s, "document.serialize", json!({"format": "svg"}))["text"].as_str().unwrap().to_string();
+    assert!(text.contains(&format!("<script xlink:href=\"{outside}\"/>")), "{text}");
+}
diff --git a/crates/ui-egui/src/dialogs/svg_options.rs b/crates/ui-egui/src/dialogs/svg_options.rs
index b32f520bcb..ac568dbace 100644
--- a/crates/ui-egui/src/dialogs/svg_options.rs
+++ b/crates/ui-egui/src/dialogs/svg_options.rs
@@ -272,12 +272,16 @@ fn code_view(app: &VectorcraftApp, ui: &mut egui::Ui, d: &Dialog) {
     }
     // One cached text, replaced when the document or the options change.
     let key = egui::Id::unique("svg-code");
-    let sig = egui::Id::unique((st.uid, st.revision, opts.to_string())).value();
+    // The read roots in force and the document's folder decide whether the text may be shown.
+    let roots = vectorcraft_engine::file_access::current().map(|r| r.describe());
+    let sig = egui::Id::unique((st.uid, st.revision, opts.to_string(), roots, st.path.as_deref())).value();
     let code: Arc<String> = match ui.ctx().data(|m| m.get_temp::<(u64, Arc<String>)>(key)).filter(|(s, _)| *s == sig) {
         Some((_, c)) => c,
         None => {
             const MAX: usize = 200_000;
-            let mut text = match vectorcraft_engine::cmd::fileio::encode_all(&st.doc, "svg", &json!({ "svg": opts })) {
+            let encoded = vectorcraft_engine::cmd::fileio::check_linked_scripts("document.export", "svg", st)
+                .and_then(|()| vectorcraft_engine::cmd::fileio::encode_all(&st.doc, "svg", &json!({ "svg": opts })));
+            let mut text = match encoded {
                 // Shown as text whatever the file's encoding.
                 Ok(enc) => enc
                     .files
@@ -383,6 +387,38 @@ mod tests {
         assert_eq!(app.ui.dialog.as_ref().unwrap().f64("decimals", 0.0), 1.0);
     }
 
+    /// Show Code under read roots draws no SVG of a document that links a JavaScript file outside
+    /// them: it shows the error, which names no file or folder. Without roots it shows the link.
+    #[test]
+    fn show_code_leaves_out_a_linked_javascript_file_outside_the_read_roots() {
+        let tmp = std::env::temp_dir();
+        let root = tmp.join(format!("vc-svg-code-root-{}", std::process::id()));
+        std::fs::create_dir_all(&root).unwrap();
+        let script = tmp.join(format!("vc-svg-code-away-{}", std::process::id())).join("menu.js").to_string_lossy().into_owned();
+        let (mut app, _) = app("/tmp/code.svg");
+        app.run("svgInteractivity.addFile", json!({"file": script})).unwrap();
+        app.run("file.export.svg", Value::Null).unwrap();
+        app.ui.dialog.as_mut().unwrap().fields.insert("showCode".into(), json!(true));
+        let roots = vectorcraft_engine::file_access::AutomationRoots::new(&[&root], &[]).unwrap().unwrap();
+        // The text the code view shows after two frames in one context, with `roots` in force.
+        let code = |app: &mut VectorcraftApp, roots: Option<&Arc<vectorcraft_engine::file_access::AutomationRoots>>| {
+            let ctx = egui::Context::default();
+            theme::install_fonts(&ctx);
+            for _ in 0..2 {
+                let mut out =
+                    vectorcraft_engine::file_access::confine(roots, || ctx.run_ui(Default::default(), |ui| super::super::show(app, ui.ctx())));
+                out.textures_delta.clear();
+            }
+            ctx.data(|m| m.get_temp::<(u64, Arc<String>)>(egui::Id::unique("svg-code"))).map(|(_, c)| c.to_string()).unwrap_or_default()
+        };
+        let confined = code(&mut app, Some(&roots));
+        assert!(confined.contains("a linked JavaScript file is outside the read roots"), "{confined}");
+        assert!(!confined.contains("menu.js") && !confined.contains("vc-svg-code"), "{confined}");
+        let shown = code(&mut app, None);
+        assert!(shown.contains(&format!("<script xlink:href=\"{script}\"/>")), "{shown}");
+        let _ = std::fs::remove_dir_all(root);
+    }
+
     /// A dialog a save panel opened carries the dialog layer's own `__` fields; the save is given
     /// only the SVG options, so it is not refused for an unknown key.
     #[test]
diff --git a/crates/ui-egui/src/io/export.rs b/crates/ui-egui/src/io/export.rs
index aaf2bd5b1f..8fe3ef2dd9 100644
--- a/crates/ui-egui/src/io/export.rs
+++ b/crates/ui-egui/src/io/export.rs
@@ -41,6 +41,7 @@ pub fn export(app: &mut VectorcraftApp, format: Option<&str>, path: Option<Strin
     // A `.ai` file names the view's active artboard.
     remember_active_artboard(app);
     let st = app.session.active().ok_or("no document")?;
+    fileio::check_linked_scripts("file.exportAs", f.id, st).map_err(|e| e.to_string())?;
     let doc = match fileio::export_doc(st, f, params).map_err(|e| e.to_string())? {
         std::borrow::Cow::Borrowed(_) => st.doc.clone(),
         std::borrow::Cow::Owned(d) => std::sync::Arc::new(d),
diff --git a/crates/ui-egui/src/menus/ui_commands.rs b/crates/ui-egui/src/menus/ui_commands.rs
index 925d7adf3b..523380e84c 100644
--- a/crates/ui-egui/src/menus/ui_commands.rs
+++ b/crates/ui-egui/src/menus/ui_commands.rs
@@ -1325,7 +1325,7 @@ pub const UI_COMMANDS: &[(&str, &str, &str, &str)] = &[
         "file.exportAs",
         "Export As…",
         "",
-        "{format?, useArtboards?, range?} opens Export As (then the format's options); with {path, …document.export options} writes the file(s) → {path, warnings, files?}",
+        "{format?, useArtboards?, range?} opens Export As (then the format's options); with {path, …document.export options} writes the file(s) → {path, warnings, files?}; under automation read roots, an SVG or SVGZ is refused while the document links a JavaScript file outside them, as document.export refuses it",
     ),
     (
         "ui.fileInfoDialog",
diff --git a/crates/ui-egui/src/tests/automation.rs b/crates/ui-egui/src/tests/automation.rs
index 56f18399f5..cf071b0c16 100644
--- a/crates/ui-egui/src/tests/automation.rs
+++ b/crates/ui-egui/src/tests/automation.rs
@@ -242,6 +242,36 @@ fn control_export_refuses_an_option_no_format_takes() {
     let _ = std::fs::remove_dir_all(base);
 }
 
+/// `app.export`, and `file.exportAs` run as a command, write no SVG of a document that links a
+/// JavaScript file outside the read root, and the error names no file or folder; the person at the
+/// keyboard exports it with the link as stored.
+#[test]
+fn control_svg_export_refuses_a_linked_javascript_file_outside_the_read_root() {
+    let (mut app, tx, base) = confined("svg-script");
+    app.run("file.new", json!({"width": 100, "height": 50})).unwrap();
+    app.run("shape.rectangle", json!({"x": 10, "y": 10, "width": 20, "height": 20})).unwrap();
+    let script = s(base.join("outside/menu.js"));
+    app.run("svgInteractivity.addFile", json!({"file": script})).unwrap();
+    let path = s(base.join("out/a.svg"));
+    for (method, params) in [
+        ("app.export", json!({"path": path, "format": "svg", "wait": true})),
+        ("app.export", json!({"path": s(base.join("out/a.svgz")), "wait": true})),
+        ("app.export", json!({"format": "svg"})),
+        ("engine.execute", json!({"command": "file.exportAs", "params": {"path": path, "format": "svg"}})),
+    ] {
+        let r = request(&mut app, &tx, method, params.clone());
+        let e = r["error"].as_str().unwrap_or_default();
+        assert!(e.contains("a linked JavaScript file is outside the read roots"), "{method} {params}: {r}");
+        assert!(!e.contains("menu.js") && !e.contains(&s(base.clone())), "{method} {params}: {r}");
+    }
+    assert_eq!(std::fs::read_dir(base.join("out")).unwrap().count(), 0, "nothing written");
+    // The person at the keyboard isn't confined.
+    app.run("file.exportAs", json!({"path": path, "format": "svg"})).unwrap();
+    let svg = std::fs::read_to_string(&path).unwrap();
+    assert!(svg.contains(&format!("<script xlink:href=\"{script}\"/>")), "{svg}");
+    let _ = std::fs::remove_dir_all(base);
+}
+
 /// `app.export` with a path writes the file when given an option only another format reads, and
 /// its warnings name that option, as `document.export`'s do without a path. `file.exportAs` run
 /// as a command does the same; an export that automation did not ask for gets no such note.
diff --git a/docs/mcp.md b/docs/mcp.md
index cb5c40501c..b9eab93981 100644
--- a/docs/mcp.md
+++ b/docs/mcp.md
@@ -234,6 +234,14 @@ the suite) keep the agent to the folders you give it:
   file outside the read roots by its file name alone in `files`, as `document.json` does, and `removeFile` takes that
   name for it (see SVG interactivity). In a frame a request drives, the JavaScript Files dialog lists such a file by
   its file name, and `ui_inspect` gives the file selected in the dialog the same way.
+- An SVG or SVGZ of a document that links a JavaScript file outside the read roots (SVG Interactivity's files: a
+  path, a `file:` URL, or a relative path taken from the document's folder) is refused with "a linked JavaScript
+  file is outside the read roots", which names no file or folder: `document.serialize`, `document.export` (MCP's
+  `export`), `document.exportSelection`, `document.exportForScreens` and `assets.export` (before the folder is
+  made or any row is written), `document.save`, `file.save`, `file.saveAs` and `file.saveCopy` (also a save
+  without a path of a document whose own format is SVG or SVGZ), `file.exportAs`, and the SVG Options dialog's
+  Show Code. A file given as another URL (`https://…`) is not checked. The document keeps the link, and the
+  person at the keyboard exports it as stored.
 - `plugin.list`, `plugin.safeMode`, `file.recovery.*` and `ui_inspect`'s `scriptReport` leave out the paths
   outside the read roots, also those the person or an earlier request put there. In `plugin.list`, the plug-in
   folder last loaded is `null` in `folder.folder`, and a failed file in `folder.failed` and a plug-in's `source`
@@ -4916,7 +4924,8 @@ more than one linked file (two such files, or such a file and a file linked as t
 error and unlinks nothing. `ui.javascriptFilesDialog {}`
 opens the JavaScript Files dialog, whose Choose… puts a picked file in as a `file:///` URL. SVG export writes each event
 as an event attribute on the object's element (`onclick="…"`; with the SVG Tiny 1.2 profile it leaves them out with a
-warning) and each file as `<script xlink:href>`. SVG import reads the event attributes the panel lists and the
+warning) and each file as `<script xlink:href>`, as stored; for a caller with automation read roots, an SVG or SVGZ
+of a document that links a file outside them is refused (see the read roots above). SVG import reads the event attributes the panel lists and the
 `<script>` links back as text; it never reads a script file or runs a script, and leaves inline scripts and the links
 after the first 64 out with a warning. An unnamed `<g>` with event attributes of its own stays a group, apart from the object in
 it. The native format keeps the events and the files.
diff --git a/docs/target-app-parity.md b/docs/target-app-parity.md
index e309f72409..fe85053343 100644
--- a/docs/target-app-parity.md
+++ b/docs/target-app-parity.md
@@ -807,6 +807,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - `ui.inspect` under `--automation-read-root`: the documents still opening, the recent files, library panels' files and folder preferences (saved, and in an open Preferences dialog) outside the read roots are left out of the reply, a library loaded from outside them shows by its file name in `ui.inspect` and `ui.docking`, and the app's state is not changed. `crates/ui-egui/src/tests/automation.rs` (`ui_inspect_leaves_out_paths_outside_the_read_root`).
   - Link replies under `--automation-read-root`: `links.list`, `links.check`, `links.info` and `document.open`'s link rows leave out the path, found path and folder of a linked file outside the read roots, and the stored size and date of it in `links.info`; each row keeps its id, file name and status, and the document's links are not changed. `crates/engine/src/tests/linkspanel.rs` (`link_paths_outside_the_read_roots_are_left_out`), `crates/engine/src/tests/placed_document.rs` (`link_info_leaves_out_a_placed_documents_path_outside_the_read_roots`).
   - Document replies under `--automation-read-root`: `document.inspect` gives `path` as null for a document file outside the read roots, and `document.json` names a linked image or placed file outside them by its file name alone, without its relative path, size or date, brush art included, leaves out a relative path that leads outside them and a stored brush entry that does not read as a brush, names a data set's image value outside them by its file name, and leaves an Export for Screens folder outside them out of `export_settings`; the document is not changed. `crates/engine/src/tests/placed_document.rs` (`document_replies_leave_out_paths_outside_the_read_roots`, `document_json_checks_brush_art_and_relative_paths_against_the_read_roots`).
+  - SVG output under `--automation-read-root`: `document.serialize`, `document.export`, `document.exportSelection`, `document.exportForScreens`, `assets.export`, the SVG and SVGZ saves, `file.exportAs` and the SVG Options dialog's Show Code refuse an SVG or SVGZ of a document that links a JavaScript file outside the read roots, before any file or folder is written, with an error that names no file or folder; a URL, a file inside the roots and a relative path that leads inside them are written as stored, and the person at the keyboard exports every link as stored. `crates/engine/src/tests/interactivity.rs` (`confined_svg_output_refuses_a_linked_javascript_file_outside_the_read_roots`, `svg_output_keeps_linked_javascript_files_a_caller_may_read`), `crates/ui-egui/src/tests/automation.rs` (`control_svg_export_refuses_a_linked_javascript_file_outside_the_read_root`), `crates/ui-egui/src/dialogs/svg_options.rs` (`show_code_leaves_out_a_linked_javascript_file_outside_the_read_roots`).
   - Linked-file and font-file searches under `--automation-read-root`: `links.findFiles` and `text.findFontFiles` replies, also later polls and stops of a search another client started, leave out the files found, a link's saved path and the folder searched outside the caller's read roots, and a failed search gives its reason without the path; `image.info` gives `link: null` for a linked file outside them; `text.addFontFiles` gives `folder: null` and the copies' file names when the Fonts folder is outside them. `crates/engine/src/tests/linkfiles.rs`, `crates/engine/src/tests/fontfiles.rs`, `crates/engine/tests/font_folder.rs`.
   - Swatch, brush, symbol and graphic style library lists under `--automation-read-root`: every library stays listed, the paths of library files and the user library folder outside the read roots are `null`, a library loaded from outside them is listed and found as `loaded/<file name>` and keeps that id for the session unless a library loaded later without a file shows that id itself, which moves it to the next free `loaded/<file name> (N)`, and the app's own list is not changed. `crates/engine/src/tests/library_roots.rs`.
   - Preferences commands under `--automation-read-root`: `prefs.get`, `prefs.list`, `prefs.set` and `prefs.reset` show folder preferences outside the read roots as `null` and leave out an export preset's folder outside them, and the preferences are not changed. `crates/engine/src/tests/prefs_roots.rs`.