Hybrid RAG that knows when it doesn't know
11 min read
- #ai
- #rag
- #postgres
Two retrieval arms, rank fusion, and a calibrated confidence score — so the AI asks a clarifying question instead of confidently inventing an answer.
Engineering
How we build Acorn Reply — AI drafting, retrieval, notifications, and the small-team support stack.
Two retrieval arms, rank fusion, and a calibrated confidence score — so the AI asks a clarifying question instead of confidently inventing an answer.
Why a mobile-first inbox ships push as a PWA over Web Push, not native apps — VAPID, tiny payloads, debounced writes, and pruning dead subscriptions.