What it does

Open Claude Cowork is an Electron desktop chat app that talks to Claude via the Agent SDK, backed by a Node/Express server. It streams responses token-by-token and visualizes tool calls in a sidebar. The same repo also ships Secure Clawdbot, a CLI bot that bridges the same agent stack into WhatsApp, Telegram, Signal, and iMessage.

The interesting bit

The real work isn’t the UI — it’s the plumbing. Composio’s Tool Router (plus MCP) handles the 500+ SaaS integrations, so the app doesn’t maintain its own Slack or Gmail connectors. That makes this more of a reference integration than a from-scratch agent framework, which is honestly the smarter move.

Key highlights

• Desktop app runs on macOS, Windows, Linux; messaging bot covers WhatsApp, Telegram, Signal, iMessage
• Supports both Claude Agent SDK and Opencode as model providers
• Persistent sessions with SSE streaming
• Custom skills via SKILL.md files dropped in .claude/skills/
• Browser automation, scheduling, and memory features in the messaging bot

Caveats

• Requires two terminal processes to run locally (server + Electron), which the README flags in troubleshooting
• Needs three separate API keys to fully function (Anthropic, Composio, optional Opencode)
• The “500+ integrations” claim comes from Composio, not this repo’s own code

Verdict

Worth a look if you want a local, hackable Claude interface with real tool use, or if you’re building messaging-based agents and need a reference adapter pattern. Skip it if you need a polished one-click installer or don’t want to manage another API key dashboard.