Webview tRPC Messaging

Type-safe RPC communication between the VS Code extension host (server) and React webviews (client) using tRPC.

Architecture Overview

React Webview (client)                    Extension Host (server)
─────────────────────                     ──────────────────────
useTrpcClient() hook                      WebviewController
  └─ createTRPCClient                       └─ setupTrpc()
       └─ vscodeLink ──── postMessage ────►     ├─ callerFactory(appRouter)
            (send/onReceive)              ◄─────┤   └─ procedure(input)
                                                └─ abort/subscription.stop

Key files (read as needed for implementation details):