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v1.13.19-html-artifact-panes: pane-based artifact viewer with on-request HTML

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Every assistant message gets an "Open in pane" affordance that opens the
message in the workspace splitter — Markdown pane (Copy + Download .md) by
default; HTML pane (Download .html only) when the model emits a self-contained
<!DOCTYPE html> or fenced ```html artifact. BOOCHAT.md rule keeps Markdown
default at every length; HTML opt-in on explicit user request.

Backend: services/artifacts.ts (slug derivation + write helpers with
symlink-escape guard via realpath-after-mkdir), routes/artifacts.ts (POST
download + GET stream with nosniff + CSP sandbox defense-in-depth), HTML
detection in finalizeCompletion writing a new message_parts.kind='html_artifact'
row (schema CHECK extended via v1.13.13 pattern), graceful 1MB cap via the
pure decideHtmlArtifactWrite helper. PartKind union extended.

Frontend: MarkdownRenderer.tsx extracted from MessageBubble's inline
MarkdownBody for reuse; MarkdownArtifactPane.tsx + HtmlArtifactPane.tsx with
loading/error states; pane state is reference-only ({chat_id, message_id,
title}) — content fetched on mount to keep workspace_panes jsonb small and
avoid 1MB blobs riding session_workspace_updated frames. iframe sandbox
locked to allow-scripts allow-clipboard-write allow-downloads with no
allow-same-origin, srcDoc not src. openInPane discriminates 404 (expected
fallback) from real errors (toast + bail). PanelRightOpen icon button with
mobile 44px tap-target.

31 new server unit tests including a real-symlink filesystem case; 332/332
server tests passing, tsc clean both sides, pnpm -C apps/web build green.
Smoke deferred to first deploy.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
indifferentketchup
2026-05-23 12:43:13 +00:00
parent 1a889dcde3
commit ad45b28250
24 changed files with 1864 additions and 195 deletions
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27
apps/server/src/routes/sessions.ts
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@@ -13,12 +13,37 @@ const CreateBody = z.object({
agent_id: z.string().min(1).max(200).nullable().optional(),
});
// v1.14.x-html-artifact-panes: 'markdown_artifact' + 'html_artifact' added
// as pane kinds. Pane state is a reference only (chat_id + message_id +
// title) — the actual artifact body is fetched from the message row or
// message_parts.payload by the pane component on mount.
const MarkdownArtifactStateZ = z.object({
chat_id: z.string().min(1).max(200),
message_id: z.string().min(1).max(200),
title: z.string().max(500),
});
const HtmlArtifactStateZ = z.object({
chat_id: z.string().min(1).max(200),
message_id: z.string().min(1).max(200),
title: z.string().max(500),
});
const WorkspacePaneZ = z.object({
id: z.string().min(1).max(200),
kind: z.enum(['chat', 'terminal', 'agent', 'empty', 'settings']),
kind: z.enum([
'chat',
'terminal',
'agent',
'empty',
'settings',
'markdown_artifact',
'html_artifact',
]),
chatId: z.string().min(1).max(200).optional(),
chatIds: z.array(z.string().min(1).max(200)).max(50),
activeChatIdx: z.number().int(),
markdown_artifact_state: MarkdownArtifactStateZ.optional(),
html_artifact_state: HtmlArtifactStateZ.optional(),
});
const WorkspacePanesBody = z.object({