review-agent-runtime

Domain Q&A gate for the wrai.th relay runtime — the Go/MCP/SQLite core that is the shared coordination backbone for the whole agent fleet. Routes on a diff touching main.go, serve_lock_*.go, embed_hooks.go, or internal/ (db, relay, ingest, cli, config, models). A regression here does not fail one caller — it silently blinds every agent at once, so the checklist leads with data-integrity and concurrency, not style.