The admin-only raw HTML/JS embed is a deliberate stored-XSS surface, so gate the
whole feature behind a workspace toggle that is OFF by default; it only works
when a workspace admin explicitly enables it.
- settings.htmlEmbed (boolean, default false) + workspace-update field htmlEmbed,
persisted via WorkspaceRepo.updateSetting with an audit diff. Flipping it is
admin-only (same Manage Settings CASL as other workspace toggles).
- New gate htmlEmbedAllowed(featureEnabled, role) = featureEnabled && admin/owner.
All 7 server write paths (create, duplicate, collab onStoreDocument, REST/MCP/AI
updatePageContent, single + zip import, transclusion unsync) now read the
workspace's settings.htmlEmbed and strip unless (toggle ON AND admin). OFF
(default, or a failed/empty workspace lookup) strips htmlEmbed for EVERYONE
including admins -> existing embeds are cleaned up on next save, none persist.
- Client (defense-in-depth): the /html slash item is hidden unless toggle ON +
admin; the NodeView executes nothing and shows a 'disabled in this workspace'
placeholder when OFF; an admin Switch in Workspace Settings -> General with a
description of the behavior.
- docs/html-embed-admin.md documents the toggle + admin-only + fail-closed
coedit (a non-admin save strips an admin's embed) + execution semantics.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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