Notes from building aec-rfi-agent — a revision-aware RAG agent that drafts cited answers to construction RFIs and reports gaps instead of guessing. Articles embed live replays of the real pipeline; try the interactive console for the full thing.
- 2026-11-04Field Notes: Five Bugs That Taught Me RAG Engineering
Schema drift, rate limits backoff can't fix, section codes keyword search can't find, a bracket that ate clause numbers, and a script that lied about transactions.
- 2026-11-04Retrieval Is Not Safety
A RAG agent with perfect retrieval still cited superseded revisions 62% of the time and answered every unanswerable trap. The safety lives in the layers after retrieval.