Root cause: pool.go applied busy_timeout PRAGMA via db.Exec() which only
affects one connection in the pool. Other connections had no busy_timeout,
causing immediate SQLITE_BUSY errors during concurrent startup operations
(agent creation, WebSocket connect, health checks). This silently aborted
context file seeding — BOOTSTRAP.md, USER.md, AGENTS.md all missing from
system prompt on first interaction.
Fix (3 layers):
1. pragmaConnector: wraps sql.Driver to apply PRAGMAs (busy_timeout, WAL,
etc.) on every new connection, not just one. All SQLite queries benefit.
2. CacheInvalidateFunc: clears ContextFileInterceptor cache after seeding
so LoadContextFiles sees newly seeded files on the first turn.
3. fallbackBootstrap: if DB seed still fails, injects embedded templates
in-memory so the first turn still gets onboarding. Clears after use.
viettranx
b088144fd9