Drop an idea, observation, or half-formed thought. It lands in a pending inbox and gets reviewed next time you run /brain-dump in Claude. Each entry is timestamped and auto-routes to a TASK, SIL deposit, CHANGELOG note, or trash.

1. Submit → entry stored in Cloudflare KV with timestamp
2. Next Claude session: digest shows 🧠 N pending
3. Run /brain-dump → Claude surfaces each entry, routes it, clears the inbox
4. Archive of every entry + routing lives in BRAIN_DUMP.md