Search stored memories for query. Call before answering questions about prior work, decisions, or past conversations. Default mode="fast" (vector search, ~0.1s); use mode="thorough" only when a fast result looks wrong or stakes are high (~3s, hybrid search). Current facts list first, superseded/expired after, marked. Every hit shows its id, status, and recorded date. Fix a stale hit with memex_correct; see its history with memex_get. Do not use this to store a new fact -- use memex_store instead.

Remember or store one new, self-contained memory verbatim -- exact text, not a summary. Optional valid_from/valid_to/event_at/source, and supersedes (ids this replaces; unknown or another user's ids are rejected). The reply echoes recorded_at and any declared window so you can confirm without a recall. Do not use this to correct something already in memory -- use memex_correct with the old id instead of storing a near-duplicate.

Correct a memory that is wrong or outdated, in one call: stores text as a new record superseding id. The old record is kept, marked superseded, and stays visible in memex_get's history -- nothing is deleted. id must come from a prior memex_recall or memex_get result; an unknown id is rejected. If id is already superseded, this reports the current replacement instead of writing, unless force=true. Do not use this for a brand-new, unrelated fact -- use memex_store instead.

Fetch exactly one memory by id, verbatim, with its correction chain in both directions: what it replaced (oldest last) and what replaced it (newest last). Use this to resolve a "SUPERSEDED by " marker from memex_recall, or to confirm an id before passing it to memex_correct. An unknown id is an error. Do not use this to find a memory by topic -- use memex_recall instead.

List memories by recency, no search query needed -- good for "what changed recently" or catching up after time away. since (ISO-8601) is a lower bound: only records at or after it. kind="corrections" shows only memories that corrected an older one, with the id(s) they replaced. Do not use this to find a memory about a topic -- use memex_recall instead.

Check whether the memory backend is up, and see store-wide stats (current/superseded/expired counts, oldest/newest record, queue and dead-letter depth) in one call. Call this after any other memex_* tool returns isError, before retrying. Do not call this to search memory -- use memex_recall for that.