Make room without burning the archive.
Forgetting in MemState is policy-driven salience: material that has not been reinforced by recent observations or context queries becomes less visible. Archived content stays recoverable for compliance while staying out of everyday answers — without a separate “forget” call from the agent.
How to talk about it externally
Position archival as a visibility change (what shows up in default retrieval), not deletion. Emphasize that active workflows keep topics fresh automatically when they are retrieved or updated.