A memory API for agents. Hybrid retrieval over episodes and extracted claims, with a graph of what replaced what, what disagrees with what, and what was computed from what.
A superseded memory is not deleted. It stays reachable, marked, and pointed at whatever replaced it — so "what did we think in March" is answerable.
Not a document-to-chunk tree. Supersedes, contradicts, derived-from: claims about how two memories relate.
Delete a source and everything computed from it goes stale, because a derivation must never outlive its evidence.