Tianshu Harness (天枢)

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Tianshu Harness (oh-my-tianshu) is a full-capability open-source coding agent: an agent harness with vision, cross-session memory, verification gates, agent routing, semantic + graph code retrieval, file rewind, and a full-screen terminal UI — all composed as plugins.

It is a friendly fork of DeepSeek Harness (dsh, MIT) released under the Apache License 2.0. The fork point is the 2026-08 baseline; this line evolves independently and does not track upstream. See NOTICE for the full attribution.

It keeps the upstream architecture where everything is a plugin.

Install

Requirements: Node ^22.19 || >=24, and a DeepSeek API key (DEEPSEEK_API_KEY).

Run it straight from npm:

npx @huiliyi37/oh-my-tianshu tui

Or install globally:

npm i -g @huiliyi37/oh-my-tianshu
oh-my-tianshu tui

npm 11 and newer blocks lifecycle scripts it has not been told to allow (allowScripts). The native dependencies need theirs — koffi compiles from source, node-pty builds its PTY binary, @huiliyi37/dsh-subprocess-local restores the PTY spawn-helper's executable bit, and @google/genai / protobufjs generate runtime assets — so allow them on the global install:

npm i -g --allow-scripts=koffi,node-pty,@huiliyi37/dsh-subprocess-local,@google/genai,protobufjs @huiliyi37/oh-my-tianshu

If npm still warns about a package not on this list, append it and re-run; a silently skipped native build surfaces later as Cannot find module at runtime.

Android (Termux)

On Termux (or a proot-distro root) process.platform is android, the koffi FFI dependency has no Android prebuilt and compiles from source, and its CMake configure needs the Termux prefix — which a proot-distro root may not export. Set it before installing:

export PREFIX=/data/data/com.termux/files/usr
npm i -g @huiliyi37/oh-my-tianshu

API key: export it before starting, or drop it in the user env file once (loaded automatically on every boot):

export DEEPSEEK_API_KEY=sk-…
echo 'DEEPSEEK_API_KEY=sk-…' >> ~/.dsh/.env

The first line covers the current shell; the second persists it.

On the welcome screen, check the environment line: API Key ✓ means the key is in place; API Key ✗ means it was not found — set it and restart. Quit with Ctrl+Q or /exit.

For development (or to hack on the harness itself), run from a repository checkout — requires git, Node ^22.19 || >=24, and pnpm:

git clone https://github.com/huiliyi37/oh-my-tianshu.git
cd oh-my-tianshu
pnpm install
pnpm run build
pnpm oh-my-tianshu tui
pnpm oh-my-tianshu web

pnpm oh-my-tianshu tui runs the full-screen terminal UI from source; pnpm oh-my-tianshu web serves the Web UI at http://127.0.0.1:3080.

What the full build adds

Beyond the upstream baseline (files, shell/PTY, skills, tasks/goals/plans, subagents and workflows, sandboxing and approvals, resumable sessions, LSP, web access, context compaction, loop-hygiene guards), this monorepo ships the differentiated capability set:

Use Tianshu

Web UI

For the recommended local interface, start the Web UI from the npm install (oh-my-tianshu web) or from a built checkout:

pnpm run build
pnpm oh-my-tianshu web

The Web UI is served at http://127.0.0.1:3080 by default.

Profiles

oh-my-tianshu boots profiles — ordered stacks of plugin-bundle patch layers under your own overrides in $DSH_HOME/profiles/<name>:

oh-my-tianshu --profile web                       # the browser UI (same as: oh-my-tianshu web)
oh-my-tianshu plugin --profile tui add <package>  # install a plugin into a custom profile
oh-my-tianshu --profile tui                       # boot it

The CLI contract describes profile layout, layer semantics, and config dump commands.

Terminal UI

Start the full-screen terminal interface:

oh-my-tianshu tui          # or: oh-my-tianshu --profile tui

The TUI is a port of the Tianshu (opencode-tui) render core adapted to the harness seams, with an oh-my-pi-aligned interface: a bordered welcome card with a gradient logo, a segmented status bar embedded in the composer's top border, full-width message-surface tints (user bubble, per-status tool blocks), and 17 themes (the amber omp is the default, graphite and friends remain via /theme). Type / to open the command menu — ↑↓ to select, Tab to accept, Enter to submit, Esc to close. Press Ctrl+. any time for the shortcut map.

Slash commands

Keyboard shortcuts

Interaction

Tool approvals prompt inline as ⚠ 允许执行 …？[y/N] with a unified diff preview above the prompt. Subagent runs appear as spinner lines in the live region and settle into ✓/✗/◌ scrollback entries on completion. The bottom three rows are the input line (with a bottom-edge line colored by mode), the footer (mode badges + shortcut hints), and the metrics row (model / token usage / cache hit rate).

Image paste and terminal preview

Ctrl+V (or right-click / terminal-menu paste) reads the system clipboard image — macOS osascript, Linux wl-paste/xclip, Windows PowerShell — and attaches it; pasting text that looks like an image path loads the file as an attachment instead. Attached images render as a 📎 N images marker above the input line and, on submit, as inline terminal graphics (kitty / iTerm2 protocols) under the user bubble. The bubble carries a vision hint: an image-capable primary sees the image directly; a text-only primary with a vision bridge configured gets the image described by the vision model first; with neither, the TUI warns that the image was not sent (and does not submit it).

Vision bridge (optional)

dsh-vision-bridge lets a text-only primary still read user images: at agent/pre-step it describes image attachments through a dedicated vision model and injects the description as a plugin-source user message (model-visible ⟺ logged; bridge failure degrades to a visible note, never a failed turn). Enable by adding the plugin with a vision-capable provider/model:

# cordis.yml
- id: vision-bridge
  name: '@huiliyi37/dsh-vision-bridge'
  config:
    provider: deepseek-official   # any registered llm route that can see images
    model: <vision-capable model>

and set the TUI's vision state (in the tui-runner bundle config) so the bubble hint reflects the bridge: supportsVision: false, bridgeEnabled: true.

Vision co-pilot (ask_image, optional)

dsh-vision-ask goes one step further than the bridge: every image the user attaches is registered in a session-scoped registry under a short id (img_1, …), and the ask_image tool lets the main model re-interrogate any retained image — different questions, different angles — without the user re-sending it. A multimodal primary gets the original image forwarded back; a text-only primary gets a vision-model answer about the image. See packages/tui/vision-ask for configuration.

DeepSeek Spark mode

The deepseek-spark provider route truncates assistant reasoning to the tail N tokens on the wire (flash 300 / pro opt-in), keeping the model's context lean; dsh-spark-anchors pairs with it, re-injecting the excluded paths so the model does not re-derive ruled-out options. Enable once — settings hot-reload, no restart:

# settings.yaml
llm-deepseek:
  spark:
    enabled: true

then switch with /model spark-flash or /model spark-pro (aliases for deepseek-spark/deepseek-v4-flash / deepseek-spark/deepseek-v4-pro). Spark shares the DeepSeek API key — no extra configuration. dsh-spark-anchors mounts with the tui bundle, so the anchor compensation is live once a session runs on the deepseek-spark route; a self-assembled profile adds it explicitly (see the package README).

Headless

Run one task, print the final answer, and exit:

oh-my-tianshu run "summarize this workspace"

Automation and SDKs

From a source checkout with DEEPSEEK_API_KEY in the environment or its root .env, start the ACP automation server:

pnpm run demo:acp

The Python SDK drives a bundled JSON-RPC runtime. The examples cover the runnable headless, ACP, JSON-RPC, Code Mode, and self-referential compositions.

Architecture

• Everything is a plugin. Models, tools, policies, storage, context management, and interfaces are composable Cordis plugins, so deployments can extend or replace behavior without forking the agent loop. See the architecture for the underlying design.
• Runs are reconstructable. Anything visible to the model is logged in the authoritative session stream; persistence, resume/fork/query, replay, telemetry, and UIs derive from the same events. See the session-log architecture.
• Code Mode (opt-in). It exposes a run_code tool and a generated TypeScript SDK; only program output re-enters model context. See Code Mode.
• Self-referential Cordis tools are opt-in. They let the agent inspect its live runtime and mount or unmount plugins while it runs. See the Cordis tools.

Telemetry

Disabled by default — nothing is uploaded anywhere. To stream session telemetry to your own OTLP/HTTP collector, set DSH_TELEMETRY_OTLP_URL (e.g. https://collector.example.com/v1/logs). A non-empty DSH_TELEMETRY_DISABLED force-disables it regardless of other settings.

Relationship with upstream dsh and coexistence

This project forked from DeepSeek Harness (MIT) at the 2026-08 baseline and evolves independently — it does not track upstream releases, and its packages live under the @huiliyi37/* npm scope (CLI: @huiliyi37/oh-my-tianshu, bin oh-my-tianshu). The repository is licensed under the Apache License 2.0; upstream attribution is preserved in NOTICE, and the TUI package carries its own Apache-2.0 provenance chain (LICENSE / NOTICE / SOURCE-MAP).

Two distribution lines, installable side by side without conflicts:

• This repo fully honors $DSH_HOME (precedence: explicit config > $DSH_HOME > default home). When coexisting with the official dsh, set export DSH_HOME=~/.dsh-tianshu (no manual setup needed once the default-home isolation lands). Sessions / profiles / settings stay separate.
• Naming memo (avoid confusion): dsh-tianshu-tui = the TUI plugin for official dsh; oh-my-tianshu / @huiliyi37/oh-my-tianshu = the standalone integrated distribution; Tianshu-Tui = the upstream render-core source (Apache-2.0).
• Renaming plan (phase 2): the repo will be uniformly named oh-my-tianshu, and the launch command plus npm package name will follow (oh-my-tianshu → new command name) to eliminate semantic confusion with the plugin name dsh-tianshu-tui; this section will be updated then.

Development

Start with the development guide and read the architecture before changing packages.

For agents, follow AGENTS.md.

License

Apache-2.0. Upstream and third-party attributions: NOTICE and THIRD_PARTY_NOTICES.md.