10 DeepSeek Harness Plugins to Build Your Personal AI Agent Workbench

DeepSeek Harness (DSH) is an agent development and runtime environment whose plugin system lets users add capabilities on demand, turning a base agent into a personalized workbench. The author shares 10 plugins discovered through hands-on use, covering installation, troubleshooting, and real-world demonstrations.

Prerequisites: Installing DSH

Install the latest DSH globally via npm. On some systems the default install fails with ERR_PNPM_IGNORED_BUILDS because pnpm 11 enables strictDepBuilds and the workspace template leaves allowBuilds as a placeholder string. The fix is to run:

npm install -g @deepseek-ai/dsh --allow-scripts=@deepseek-ai/dsh-subprocess-local,koffi,node-pty,@google/genai,protobufjs

Then start the web UI with dsh web.

1. Prompt Optimizer Plugin (Author's Own)

Command: dsh plugin --profile web add dsh-ai-prompt-optimizer Adds an "AI Optimize" button in the UI. Clicking it rewrites a raw prompt into a more detailed, structured version, improving downstream agent performance.

2. Cost Meter Plugin

Command: dsh plugin --profile web add dsh-cost-meter Adds a cost menu in settings showing consumption overview and a usage heatmap, helping track API spend across sessions.

3. Plugin Marketplace (dshmarket)

Command: dsh plugin --profile web add dshmarket Provides a discoverable plugin market inside DSH settings, listing both official and community plugins, and shows already-installed custom plugins.

4. Web UI Aggregation Pack (@linxin666/dsh-web-ui-all@latest)

Command:

dsh plugin --profile web add @linxin666/dsh-web-ui-all@latest

A meta-plugin bundling multiple features: "Liang Shen" mode, task board, mobile remote, SSH operations, image understanding, right sidebar, whale-pet skins. Each feature is a separate pluggable package. Installation may hit the same ERR_PNPM_IGNORED_BUILDS error; fix by editing ~/.dsh/pnpm-workspace.yaml and changing the allowBuilds placeholder to true for the four native packages (cloudflared, node-pty, ssh2, cpu-features). After install, settings expose skin/background customization. The task board uses five columns (To Plan, To Do, In Progress, Done, Failed); clicking "Execute" on a card delegates the task to a real DSH agent session and auto-updates status. SSH sidebar imports hosts from ~/.ssh/config, stores config in ~/.dsh/dsh-ssh.json, and provides a terminal + file browser for remote ops.

5. Subscription Provider Plugin (dsh-plugin-subscriptions)

Command: dsh plugin --profile web add dsh-plugin-subscriptions Lets you use ChatGPT (Codex), Claude, and Grok (X Premium) subscriptions as LLM providers inside DSH without API keys. GitHub README:

https://github.com/V1ki/dsh-plugin-subscriptions/blob/main/README.zh.md

6. Conversation Map Plugin (github:Tasihi89/dsh-talk-map)

Command: dsh plugin --profile web add github:Tasihi89/dsh-talk-map Visualizes each session as a draggable, grid-snapped card on a whiteboard — spatial memory replaces mental tracking. Features: double-click blank area to create a session at that position; draw lines between cards to fork a new session with injected context summary; card face shows title, summary, next-step, relative time, run status; auto-generates three-field summary (overview / key conclusion / next step) after idle; bilingual UI (auto / Chinese / English); lineage lines show DSH native fork/child-agent relations (dashed) vs. user-drawn injection lines (solid). GitHub:

https://github.com/Tasihi89/dsh-talk-map/blob/main/README.zh.md

7. Univer Office Plugin (dsh-univer-office)

Command: dsh plugin --profile web add dsh-univer-office Enables agents to create/edit spreadsheets, docs, slides, multi-dimensional tables, and canvases via natural language. All writes go to a separate worktree for safe preview; user merges or discards at session end. Supports import/export of .xlsx, .csv, .tsv, .docx, .pptx. Capabilities: formula writing, charts, pivot tables, data validation, conditional formatting, rich text, page layout, slide generation from outline, transition editing, overflow/overlap checks, base tables with formula fields/filters/sorts, canvas shapes/connectors/flowcharts, and multi-unit .univer files cross-referencing sheets/docs/slides. GitHub:

https://github.com/dream-num/dsh-univer-office/blob/main/README.zh-CN.md

8. Walioffice Plugin (walioffice-dsh-plugin)

Command: dsh plugin --profile web add walioffice-dsh-plugin Developed by JD architect "Xiao Fu Ge". Registers 10 office tools and injects WaLiOffice web UI. Note: the author observed tool-name conflicts with the Codex subscription plugin's video tools; uninstalling the subscription plugin resolved the duplicate entries.

9. AgentTeams Plugin (@nanmicoder/dsh-agent-teams@latest)

Command:

dsh plugin --profile web add @nanmicoder/dsh-agent-teams@latest

Turns the current DSH session into a team lead: creates continuable sub-agents, decomposes goals into dependent tasks, coordinates via direct messaging. Provides team protocol, 10 collaboration tools, persistent state, auto task scheduling, real-time web UI — no external workflow engine needed. GitHub:

https://github.com/NanmiCoder/dsh-agent-teams/blob/main/README_ZH.md

Demo: asked to build a Snake web game. The plugin spawned four sub-agents: architect (modular architecture & interfaces), frontend-engineer and game-engineer (parallel UI & logic), reviewer (integration review, fixed a rapid double-turn steering bug). Result: 44/44 tests passed, game playable.

10. Context Visualization Plugin (dsh-context)

Command: dsh plugin --profile web add dsh-context Adds a context tab per conversation for visual analysis of context usage. GitHub:

https://github.com/bowenliang123/dsh-context

Conclusion

DSH's plugin ecosystem shifts agent capability from "factory default" to "assemble on demand." Combining plugins builds a personal agent workbench — the essence of the customizable agent era. The ecosystem evolves rapidly; more patterns await exploration.