Memory & State

Agents have three storage horizons — the context window, short-term session state, and long-term persistent memory — and long-term memory splits into semantic facts, episodic events and procedural know-how.

A memory system is a write path (extract → dedupe → store) plus a read path (retrieve → rank → inject) over a store chosen for the access pattern — key-value, vector or graph — always scoped per user.

More memory is not automatically better: pollution, poor retrieval, summarisation drift, missing expiry, privacy exposure and no user control each turn a helpful feature into a liability.