Hybrid (vector + BM25) search over stored memories. Call this at the start of every user turn. NOTE: Lite memories expire 7d after they were saved.

Save a memory entry (Lite: 7-day TTL). Auto-deduplicates exact and near-duplicate content. Long content (>chunk_threshold chars) is chunked with a parent-document for verbatim recall.

List stored memories newest first. Parent documents shown with [doc×N] tag.

Delete a memory by ID. If the ID is a parent document (doc:), cascades to all child chunks.

Delete every memory (singles, parent docs, child chunks, sha guards) whose session_id matches. Scoped to the configured owner. Use this to wrap up a finished project or reset a polluted session before TTL expiry. IRREVERSIBLE — confirm session_id with the user first.

Re-ensure the RediSearch index (idempotent). Returns {status, message}.

§4.3.1 — Retrieve the memories sharing a turn_id plus N entries before and after in chronological order. Use this when a search_memory hit lacks enough context: pass the hit's turn_id here to surface the surrounding conversation thread. Returns {status:'not_found'} if turn_id is unknown.