Zosma Cowork 🇮🇳

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A desktop agentic work harness built on pi, the minimal, language-agnostic coding agent harness. Streaming, thinking, tool calls, multi-turn sessions — all free, all open-source, all local.

Built by Zosma AI.

Gallery

Invoice processing with natural language agents. See more demos at zosma.ai/zosma-cowork/gallery

Why Zosma Cowork?

🌟 Built on pi

Zosma Cowork is a desktop application built on pi — the minimal, language-agnostic coding agent harness. pi's philosophy of simplicity and composability carries directly into your desktop experience. Every pi extension works out of the box, with zero wrappers or adapters.

🆓 Free & Open Source

Zosma Cowork is 100% free and open-source (MIT). Bring your own API key, use an existing subscription (Claude, ChatGPT, Copilot), or run local models — you stay in control.

🧩 Full pi Extension Ecosystem

The pi ecosystem includes hundreds of extensions, skills, tools, prompts, and themes — all compatible with Zosma Cowork. Plug them into your ~/.zosmaai/cowork/ directory and they just work. No wrapping, no porting, no lock-in.

Features

• Node.js agent sidecar — The pi-mono TypeScript SDK runs in a managed sidecar process for full agent capabilities (extensions, tools, providers)
• Thin Tauri relay — The Rust layer is a minimal IPC bridge between React and the sidecar, keeping the native desktop shell lightweight
• pi extension ecosystem — Compatible with pi extensions via DefaultResourceLoader — skills, tools, and prompts auto-discovered from ~/.zosmaai/cowork/
• Multi-turn sessions — Full conversation continuity with persistent session history
• Streaming responses — See the agent think, write, and call tools in real-time
• Thinking blocks — Expandable reasoning from the model
• Tool call timeline — Live bash/edit/write tool calls with args and results
• Session management — Persistent chat sessions saved to ~/.zosmaai/cowork/
• Light & dark mode — Warm cream light mode, warm charcoal dark mode
• Keyboard shortcuts — Cmd/Ctrl+Shift+K to focus, Cmd/Ctrl+N for new session
• Abort & steering — Stop a running agent mid-turn, send follow-up steering messages
• Claude-inspired UI — 3-column layout with sidebar, workspace, and info panel

Architecture

Edit this diagram

The diagram is generated from assets/architecture.mmd. To update:

# Edit assets/architecture.mmd, then re-render:
mmdc -i assets/architecture.mmd -o assets/architecture.png -b white -w 900 -H 700

Tech Stack

Layer	Technology
Frontend	React 19, Tailwind CSS v4, Radix UI
Desktop Shell	Tauri v2, Rust, Tokio
Agent Engine	Node.js sidecar using @earendil-works/pi-coding-agent (pi-mono SDK)
Testing	Vitest, Testing Library, jsdom
Linting	Biome (frontend + sidecar), Clippy (Tauri relay)

Development

Prerequisites

• Node.js 22+
• Rust 1.85+ (for Tauri desktop shell)

Quick Start

# Install frontend dependencies
npm install

# Install agent-sidecar dependencies
cd agent-sidecar && npm install && cd ..

# Run frontend dev server
npm run dev:frontend

# Run full Tauri app (frontend + Rust relay + Node.js sidecar)
npm run dev

npm run dev runs the sidecar from TypeScript source via tsx — no bundle needed. On a fresh checkout it auto-generates lightweight dev stubs for the Tauri bundle resources (src-tauri/agent-sidecar/index.cjs, src-tauri/binaries/node) so the Rust shell can compile. The real sidecar bundle and Node.js binary are produced only by the production build (npm run build).

Scripts

# Frontend
npm run lint          # Biome lint
npm run typecheck     # TypeScript check
npm run test          # Vitest run
npm run validate      # lint + typecheck + test
npm run format        # Biome format

# Tauri
npm run build:frontend
npm run build         # Build release binary

# Agent Sidecar
cd agent-sidecar
npm run build         # TypeScript → JavaScript
npm run dev           # tsx watch (standalone development)

# Rust (Tauri relay only)
cargo fmt --all --check
cargo clippy --workspace -- -D warnings

Staging builds

Every merge to main produces unsigned cross-platform installers via the Staging Build workflow (.github/workflows/staging-build.yml). The bundles are attached as workflow artifacts (14-day retention) and a Discord embed with auth-free nightly.link download URLs is posted to whatever channel the DISCORD_STAGING_WEBHOOK repo secret points at (typically #staging-builds).

This flow does not create a GitHub Release, tag a commit, or publish to AUR / winget / Homebrew — those side-effects remain gated on the tag-triggered release.yml. See issue #133 for the design.

To run a staging build on demand, trigger Staging Build from the Actions tab via Run workflow.

One-time setup: in Discord, open the target channel → Edit Channel → Integrations → Webhooks → New Webhook, copy the URL, then add it as a GitHub repo secret named DISCORD_STAGING_WEBHOOK (Settings → Secrets and variables → Actions → New repository secret). The workflow degrades gracefully — if the secret is unset the notify job emits a warning and exits 0, so the build itself still succeeds and the artifacts are still uploaded.

Config & Data

What	Location	Notes
LLM providers & API keys	~/.zosmaai/cowork/auth.json	Managed by the app
Model definitions	~/.zosmaai/cowork/models.json	Managed by the app
Extensions & skills	~/.zosmaai/cowork/extensions/	Pi-compatible extensions
Session history	~/.zosmaai/cowork/	Managed by Zosma Cowork

IPC Protocol

The Tauri relay communicates with the Node.js sidecar via stdin/stdout JSON lines:

Commands (→ sidecar):

Command	Description
init	Initialize agent with zosmaDir config
get_models	List available models from all providers
prompt	Send user message, stream events
abort	Cancel running prompt
set_model	Switch active model
save_auth	Save API key for a provider
reload	Reinitialize with fresh extensions/auth

Events (← sidecar):

Event	UI Effect
ready	Models loaded, enable UI
event	Agent session events (thinking, text, tool calls)
done	Prompt completed
result	Response to a request command
error	Error with message

Project Structure

zosma-cowork/
├── agent-sidecar/                # Node.js agent process
│   └── src/
│       └── index.ts              # Sidecar: pi-mono SDK, stdin/stdout protocol
├── src/                          # React frontend
│   ├── components/               # UI components
│   │   ├── ChatMessage.tsx       # Message with thinking + tool calls
│   │   ├── ThinkingBlock.tsx     # Expandable reasoning
│   │   ├── ToolCallTimeline.tsx  # Tool execution timeline
│   │   ├── MessageInput.tsx      # Chat input
│   │   └── ui/                   # Primitives (tooltip, badge, etc.)
│   ├── hooks/
│   │   ├── usePiStream.ts        # Streaming state machine (useReducer)
│   │   └── useSessions.ts        # Session persistence
│   ├── types/
│   │   ├── index.ts              # ChatMessage, ToolCallInfo
│   │   └── pi-events.ts          # CoworkEvent types
│   ├── App.tsx                   # Main 3-column layout
│   └── App.css                   # Tailwind theme (light + dark)
├── src-tauri/                    # Tauri desktop shell (thin Rust relay)
│   └── src/
│       ├── main.rs               # Entry point
│       └── lib.rs                # IPC commands → sidecar process
├── docs/                         # Architecture & plans
└── .github/workflows/            # CI/CD

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Star History

Contributors

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🇮🇳 Made in India

Zosma Cowork — built from India by ZOSMAAI SOLUTIONS PRIVATE LIMITED.

Citation

If you use Zosma Cowork in your work, please cite it:

@software{zosma_cowork,
  author  = {Nayak, Arjun and Mhaskar, Akshay and Shanvit and Mishra, Devendra},
  title   = {{Zosma Cowork: A Desktop Agentic Work Harness}},
  url     = {https://github.com/zosmaai/zosma-cowork},
  version = {0.15.2},
  year    = {2026}
}

License

MIT © Zosma AI