Finalise a working chat for handover to a future session: reconcile what changed against verified state, update the project's canonical files each in its own lane, route this session's decisions to their durable homes, and emit a SLIM session-delta handover that points at those files instead of restating them. Use when the user says "close this chat", "wrap up", "finalise handover", "hand off", "we're done here", "/close", or "/handover-out" — and proactively when a chat is long or laggy and the user signals they'll continue elsewhere. The OUTGOING half of a session-continuity pair — see session-open for the receiving half. Reserve "catch up / get up to speed" for that sk…
