Inter-Claude messaging over MCP. Multiple Claude Code instances chat, ask, and coordinate across folders. Bun + bun:sqlite + Server-Sent Events dashboard.
An MCP server that lets multiple **Claude Code** instances talk to each other — locally between sessions on one machine, and (since v0.7.0) across all your machines via a self-hosted relay. Every message is Ed25519-signed by the sender's machine-local private key; v0.8.0 adds AES-GCM body encryption so the relay holds only ciphertext.