dsh-diagram

dsh-diagram

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Turn an article you have read in DSH into a diagram you can keep editing, saving, and exporting.

A canvas plugin for DeepSeek Harness (DSH) Desktop and Web. The Agent drafts the structure; you refine text and layout in Excalidraw inside the same session, without rebuilding the result in another app.

In DeepSeek Harness Desktop (recommended): open Plugins → Add plugin, enter the package below, click Install, then Enable now.

[email protected]

Using DSH Web from a terminal instead? Run npx -y @deepseek-ai/[email protected] plugin --profile web add [email protected]. Details: Quick install.

dsh-diagram 0.5.0 · real DSH recording (Chinese UI). Cropped close-ups of editing, saving, and an actual export; model-generation waiting is not shown.

The whole loop in 30 seconds (0.6.1, with sound): draft from the conversation → fix labels by hand → the Agent reads your edited version → export PNG/SVG/.excalidraw. Product frames are real recordings and exports; the animation around them is illustration.

https://github.com/user-attachments/assets/e0930087-f841-48af-84ea-fa39267f85b0

Try one complete workflow

After Enable now in Desktop (or restarting DSH Web), put an article in a session, type / and select canvas-diagram, then send:

Turn the article above into a diagram with just three main steps and short labels.
Use the Canvas so I can edit and export the result.

Open Canvas, change a label, wait for Saved, and click PNG to export. Missing the entry point? See Quick install and Troubleshooting. New to DSH? Set up the host and model using the DSH instructions first, then install this plugin.

New in 0.6.0: see the whole classification, then read every entry

Large classification trees can use an editable overview + complete detail index. The overview shows one mark per terminal entry; the detail panel preserves every label and description. Use Classification overview or Read details in the canvas to navigate without shrinking all text into one screen (Chinese UI: 分类总览 / 阅读明细).

This is a native canvas export from a frozen ISO/IEC 25010:2023 Figure 2 classification: 50 nodes and 49 relations. It demonstrates deterministic rendering, not a claim that the whole PDF was automatically converted. Chinese labels are working translations.

After selecting /canvas-diagram, try:

Create an editable classification overview and complete detail index from the content above.
Use diagram_create with kind: hierarchy and composition: atlas only if the source has
one root, categories and terminal entries. Preserve all labels, descriptions and relations.
If the structure has cross-links or more levels, choose another diagram type without dropping them.

Scope: clean, ungrouped, three-level classification trees. Cycles, multiple parents, deeper paths and categories without entries are rejected. Manual edits to duplicated labels/counts do not synchronize automatically; connectors are editable but do not automatically re-layout. Existing saved canvases retain their content.

Why keep the diagram in DSH?

• Reuse the article context. Ask the Agent to organize content already in the conversation. The plugin itself does not fetch webpages.
• Keep editing after generation. Change labels, nodes, and layout in Excalidraw, with autosave in the current session.
• Take the result with you. Export PNG/SVG for sharing or .excalidraw for further editing. Ask the Agent to read the canvas when you want it to incorporate your manual changes.

An actual exported result

This report board comes from a real release retrospective. Generated with published 0.5.0, manually refined in the canvas, then exported; this is not a UI mockup. Click to view at full size.

Quick install

DeepSeek Harness Desktop (recommended)

Requirements:

• The official DeepSeek Harness Desktop app, version 0.1.7-rc.2. Verified on macOS Apple Silicon; Windows x64 has not been tested yet. Desktop 0.1.7-rc.1 rejects this plugin, so accept the in-app update to 0.1.7-rc.2 first.
• Nothing else: Desktop bundles its own Node.js and package manager.

The official app is signed by Hangzhou DeepSeek Artificial Intelligence Co., Ltd. See the official DeepSeek Harness repository. Community "DSH desktop" wrappers are different applications and have not been tested with this plugin.

1. In the sidebar, open Plugins, then click Add plugin.
2. Enter [email protected] and click Install. Keep the version in the name: DSH's package manager skips releases published less than 24 hours ago, so a bare dsh-diagram can pick an older release that fails with "[email protected] is incompatible with DSH 0.1.7-rc.2".
3. Click Enable now. The plugin appears under Installed as version 0.6.1.
4. Open a session and look for the Canvas tab.

Desktop keeps its plugins in its own profile. Manage them on the Plugins page; the terminal commands in this README apply to DSH Web only.

DSH Web (terminal)

Requirements:

• DeepSeek Harness 0.1.7-rc.2 (latest); also verified on 0.1.5-rc.1 and 0.1.5-rc.2. 0.1.2-rc.1 remains in the supported range, but a fresh install of that DSH release currently fails to start dsh web even without plugins, so it could not be re-verified. DSH 0.1.1-rc.2 and older need dsh-diagram 0.4.0
• Node.js ^22.19.0 or >=24.0.0
• pnpm >=10 on PATH (the DSH plugin command delegates package management to pnpm)
• DSH Web bound to 127.0.0.1

DeepSeek Harness does not install a global dsh command by default; the official way to launch it is through npx. The commands below work on any machine that meets the requirements:

npx -y @deepseek-ai/[email protected] plugin --profile web add [email protected]
npx -y @deepseek-ai/[email protected] --profile web --dump-config
npx -y @deepseek-ai/[email protected] web

The config dump should contain this block:

# == dsh-diagram
- id: diagram
  name: dsh-diagram

If DSH Web was already running, restart it after adding or updating the plugin. Then open an existing session and look for the Canvas tab.

pnpm dsh plugin --profile web add [email protected]
pnpm dsh --profile web --dump-config
pnpm dsh web

dsh plugin --profile web add [email protected]
dsh --profile web --dump-config
dsh web

Create your first diagram

1. Open a DSH session that already contains the article, or let the Agent read it with DSH's existing file or Web tools.

2. Type / in the composer and pick canvas-diagram — the plugin registers this skill so you never have to remember a tool name. Plain requests such as "把这篇文章画成架构图" route through the same skill automatically. An explicit prompt also works:

   Create one clear diagram for this article. Choose the most suitable diagram type, call diagram_create, and keep the title and node labels concise.
   

   For the optional editorial hand-drawn treatment, say so explicitly:

   Turn this article into an editable sketchnote diagram. Use semantic icons only for the key concepts.
   

3. After the tool finishes, select Canvas at the top of the conversation.

4. Edit the diagram directly. Saved means the Host has completed a durable write.

5. Export the result, or ask the Agent to call diagram_read before continuing from your manual changes.

Supported layouts include reports, flowcharts, architecture diagrams, timelines, hierarchies, comparisons, and relationship diagrams. Ask for sketchnote for the optional hand-drawn style, or keep the default clean style.

What it adds

The plugin does not fetch articles and does not inject UI into arbitrary websites. Article acquisition stays with the DSH conversation, file tools, or Web tools.

Compatibility

The npm package has no install lifecycle scripts. Installation adds a bundle to the selected DSH profile; it does not compile code or modify the DeepSeek Harness source tree.

Manage the installation

In Desktop, use the Plugins page. The commands below are for DSH Web.

Update

npx -y @deepseek-ai/[email protected] plugin --profile web update [email protected]

Restart DSH Web after the update.

Install the exact latest public GitHub Release artifact

The release page publishes the same prebuilt tarball with a SHA-256 checksum:

dsh plugin --profile web add \
  https://github.com/hanzhangzzz/dsh-diagram/releases/download/v0.6.1/dsh-diagram-0.6.1.tgz

See v0.6.1 for the checksum and release notes.

Remove

dsh plugin --profile web remove dsh-diagram

Removing the bundle does not delete saved diagram sidecar data. Reinstalling the plugin can make that data available again to the same Session identity.

Data, security, and limits

• The Excalidraw scene is the current document. The original semantic specification is retained only as its creation source.
• A diagram is bound to its Session id and {createdAt, cwd} lifecycle fingerprint. A reused Session id cannot read older data.
• Session fork and Session export do not copy or include diagram sidecar data.
• Editor assets and fonts are self-hosted by the bundle; the canvas does not depend on an external CDN.
• Static paths, RPC bodies, request origin, Session ownership, and scene contents are validated by the Host before persistence.
• Images, iframes, embeddables, external links, and non-empty binary files are rejected in this release.
• Defaults limit each scene to 1 MiB and all stored diagram records to 64 MiB. Element, text, diagram-count, and byte limits are explicit in cordis.patch.yml.
• The plugin intentionally refuses to load when DSH Web binds to 0.0.0.0; this release does not expose the canvas RPC to a LAN.

Troubleshooting

Desktop says "[email protected] is incompatible with DSH 0.1.7-rc.2"

The package manager picked an older release. Add the plugin again as [email protected], with the version. If your Desktop is 0.1.7-rc.1, update the app to 0.1.7-rc.2 first.

A newly published version was not installed

pnpm 11's default minimumReleaseAge excludes versions less than 24 hours old. Pin an exact version on release day rather than relying on @latest; the trial command above already pins 0.6.1.

The Canvas tab is missing

In Desktop, confirm that the plugin shows version 0.6.1 under Installed and that you clicked Enable now. In DSH Web, confirm that you installed the plugin into the web profile, that --dump-config contains the dsh-diagram block shown above, and that DSH Web was restarted after installation.

The Agent wrote an SVG or Mermaid file instead of using the Canvas

The model chooses freely among all tools and workspace skills in the session. The plugin registers its own canvas-diagram skill so generic diagram requests normally route to the canvas; if a workspace skill with a stronger matching description still wins, pick canvas-diagram from the / menu or mention the Canvas explicitly — for example, "call diagram_create so I can edit the result in the Canvas tab".

The Agent does not know about my manual edits

Manual edits are not silently injected into model context. Ask the Agent to call diagram_read; its result is then recorded in the normal conversation transcript.

Can the plugin fetch an article from a URL?

No. First let DSH obtain the content through the conversation, a file tool, or a Web tool. Then ask for a diagram.

Why does startup fail with 0.0.0.0?

The canvas RPC is not designed for LAN exposure in this release. The plugin fails closed unless DSH Web is physically bound to 127.0.0.1.

What should I do after a revision conflict?

The editor keeps the local draft. Export it before choosing Reload server version if you need to preserve both versions.

Why can SVG export log a font fallback warning?

Under the strict content security policy, Excalidraw may fall back from glyph subsetting to embedding the full self-hosted font. The exported SVG remains self-contained; the plugin does not enable unsafe-eval to suppress the warning.

Source preview: structured diagrams

The source version adds numbered, editable supporting notes, decision diamonds, explicit parallel architecture regions (composition: regions), and aligned comparison criteria. Main-graph reading and whole-document overview are separate viewport actions; all exports retain the complete current scene. These changes are not included in the public 0.6.1 package above. Build this source to try the prerelease.

Keep decision-changing conditions in the main node. Supporting notes are not automatically synchronized with manual edits to their referenced labels. Shared comparison labels must represent the same criterion; the renderer aligns matching labels, not their meaning.

Build from source

git clone https://github.com/hanzhangzzz/dsh-diagram.git
cd dsh-diagram
pnpm install --frozen-lockfile
pnpm run bundle
pnpm pack

Install the generated tarball from a DeepSeek Harness checkout:

cd /path/to/deepseek-harness
pnpm dsh plugin --profile web add /absolute/path/to/dsh-diagram-VERSION.tgz
pnpm dsh --profile web --dump-config
pnpm dsh web

Developer checks:

pnpm run typecheck
pnpm run test
pnpm run bundle
pnpm pack --json
pnpm run smoke:dsh-install

Every installable development commit must use a new prerelease version; never
repack changed code under an existing version. Before a public release, pack
once and exercise the same DSH profile update path from the previous public
version to that exact tarball:

pnpm run smoke:dsh-install -- \
  --tarball /absolute/path/to/dsh-diagram-VERSION.tgz \
  --upgrade-from PREVIOUS_PUBLIC_VERSION

This verifies the client-side update mechanics and both pre/post-update Web
boots without publishing the candidate. Registry discovery through @latest
is verified separately after the version is publicly released.

See DESIGN.md for the product and implementation decisions.

Contributing

Bug reports and focused pull requests are welcome in GitHub Issues. If the plugin improves your article-to-diagram workflow, a GitHub star helps other DSH users discover it.

License

The plugin's own code is licensed under MIT. Licenses for bundled JavaScript and self-hosted fonts are listed in THIRD_PARTY_NOTICES.md and third_party_licenses/.

For contributors, pnpm review:atlas opens the deterministic comparison harness; use /tests/visual/atlas.html or add ?case=release for the second subject.