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Colby McHenryandClaude Opus 4.7
449282ad86
The MCP `initialize` handler was awaiting `tryInitializeDefault` — which opens the SQLite DB and runs `await initGrammars()` (tree-sitter WASM bootstrap) — before sending the JSON-RPC response. On slow filesystems (Docker Desktop VirtioFS on macOS, WSL2) this could exceed Claude Code's ~30s handshake timeout, leaving the codegraph child process alive and unresponsive with no tools visible in the client. Send the response first; defer the open to a tracked background promise. The lazy retry path used by `tools/list` and `tools/call` now awaits that promise instead of racing it with `openSync`, so we never double-open the SQLite file. Adds a subprocess-based regression test that asserts the JSON-RPC response arrives on stdout before `startWatching()` logs to stderr. This ordering check catches the regression on any filesystem, not just slow ones where the timing matters in practice. Reported by @sashanclrp; isolated by @sgrimm's wire capture. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>