dsh-artifact-preview

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Codex-style artifact preview for DeepSeek Harness (DSH).

dsh-artifact-preview is a client plugin (dsh.client.platform: "web") that makes produced files visible and inspectable right in the chat:

• Produced-files row in chat — after the agent writes files, the closing message shows a "产物" row with file chips and inline image thumbnails; clicking any of them opens the side preview.
• Split-screen side preview panel — a resizable right-hand panel (real split, conversation stays visible and unobstructed) rendering:
  • Markdown → rich text (headings, tables, lists, code fences, links, images; relative local images resolve automatically)
  • Source code (.py .js .ts .sh .css …) → dark syntax highlighting
  • CSV → HTML table
  • JSON → collapsible tree
  • Images (.png .jpg .gif .webp .svg …) → checkerboard-backed centered view
  • HTML / localhost ports → iframe (with port chips for dev servers, URL bar, back/forward/reload, open-external)
• Global hooks (window.__dshOpenFilePreview / __dshCanPreviewPath) so other plugins can route "open file" intents into the preview panel.

Install

From the DSH web Settings → Plugins → Marketplace (search dsh-artifact-preview), or via CLI:

dsh plugin --profile web add dsh-artifact-preview

Restart the dsh web service (or DSH Desktop) and refresh the page.

Prerequisites

• DSH Desktop (or a dsh web profile that has the dsh-file-changes companion installed) — the preview fetches file content through its /dsh-files/static/<absolute-path> route. On DSH Desktop this route is built in; on a bare dsh web install add the dsh-file-changes companion first.
• A model that produces files via write/edit-style tools (that is how a turn's "produced files" are tracked).

Compatibility

• Built for DSH 0.1.0-rc.6 client plugin ABI (window.__ModuleLoader__ module, dsh.client metadata, conversation.chat.turnTail chain slot). Chain-slot election relies on low priority (-100) to win the produced-files row; verify behavior after DSH upgrades.

Known boundaries

• The chat row and preview panel are fully self-contained in this package.
• Two optional behaviors are not bundled because they require patching DSH core files (intentionally left out of a public package): multi-type preview buttons in the file view, and "open → preview" for file-name mentions inside message prose. Without them, file-view preview keeps DSH's original HTML-only behavior and prose mentions open with the system app.

License

MIT