Ask HN: Read‑only LLM tool for email triage and knowledge extraction?

I’m looking for an LLM‑powered tool to help organize and query my email, but with a strict boundary: it must not write, send, or modify anything. Standard filters miss the nuance of "middle-ground" emails, and existing AI email clients demand full inbox control or try to automate too much. What I’m looking for: - Strictly read‑only triage: Categorizes incoming mail (e.g., “important”, “maybe useful”, “likely promo”) with zero write permissions ie. no sending, moving, deleting, or auto-archiving - Knowledge retrieval: Builds a searchable knowledge base from scattered threads.