James' Growth Diary

May 13, 2026 · Backend Development

How Claude Code Bridges IDEs: Local IPC Meets Remote WebSocket

The article dissects Claude Code's bridge architecture, explaining how a local IDE extension communicates with a CLI via Unix domain sockets while a remote web UI talks to the same process through a WebSocket‑SSE‑polling fallback, and it details the three worker models, three‑layer transport downgrade, four‑layer authentication, the FlushGate pattern, observability design, and the trade‑offs and costs of this 31‑file system.