Dbrain

Claude kept forgetting what I told it, and my information was spread across mail, chats and a reading list I never read. So I built Dbrain, a memory that Claude can search, running on a NAS in my flat.

Every 30 minutes an ingest loop saves new records word for word in Postgres. It makes no model calls and writes no AI summaries, so Claude always reads the original text when it answers. A separate table holds only what I explicitly asked it to remember, and the schema keeps personal and business data apart.

A tool server makes search, pages and memory available as MCP connectors in claude.ai and in Neonduck. Other services in the same stack handle messaging, smart home, fitness, shared expenses, a browser and AI phone calls. The whole stack can only be reached through an authenticated tunnel.

I wanted to measure how well it finds things. A golden set of real questions scores recall before and after every change to search, and the last recorded run answered 23 of 25. Backups run every night, and a restore is tested automatically every week.