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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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18
apps/web/src/api/client.ts
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@@ -276,6 +276,24 @@ export const api = {
request<void>(`/api/chats/${chatId}/messages/${messageId}`, {
method: 'DELETE',
}),
// v1.14.x-html-artifact-panes: write the artifact to
// <projectRoot>/.boocode/artifacts/<slug>-<ts>.<ext> and return the
// path + a /api/projects/.../artifacts/<filename> URL the browser can
// GET to download. fmt=html requires the assistant message to carry an
// html_artifact part (404 otherwise).
downloadArtifact: (chatId: string, messageId: string, fmt: 'md' | 'html') =>
request<{ path: string; url: string }>(
`/api/chats/${chatId}/messages/${messageId}/artifacts/download?fmt=${fmt}`,
{ method: 'POST' },
),
// v1.14.x-html-artifact-panes: fetch the html_artifact part payload so
// HtmlArtifactPane can render the iframe srcdoc. 404 = no html_artifact
// part on this message; MessageBubble uses that as a signal to fall back
// to the markdown pane variant.
getHtmlArtifact: (chatId: string, messageId: string) =>
request<{ html_content: string; char_count: number; title: string }>(
`/api/chats/${chatId}/messages/${messageId}/html_artifact`,
),
},
models: () => request<ModelInfo[]>('/api/models'),