Doorbeen
Connect LLMs to SQL databases. English in, answers out.
A LangGraph-powered SQL assistant. Users ask in English; Doorbeen plans, executes, corrects its own mistakes, and explains what it did. Streams, remembers context across turns, and runs against Postgres, MySQL, Oracle, SQLite, and BigQuery.
Started as a one-weekend prototype to find out how far an agent could self-correct its own bad SQL.
Further than I thought. Less far than the demos claim.
The lessons from Doorbeen shape every analyst agent in Telescope today.
lesson
Agents don't fail at generation. They fail at knowing when to stop.