The green status light
An operator restarts a service. The health endpoint turns green, the model answers a test question, and the name displayed on the screen is familiar. Those are useful operational facts. They do not establish that the session received the persona's relevant state, memories, and unfinished obligations.
A restart may use a new model, a different prompt, a stale snapshot, or no admitted recent context. The next answer might sound plausible while missing the particular concern that shaped yesterday's conversation. The difference may be invisible to a generic uptime check.
What identity needs on wake
The PHS setpoint-snapshot explanation says a readable account must be supplied early enough to shape the new session, rather than added later as commentary. The stasis guide says elapsed time should be disclosed and not erased. The transition-governance draft treats a model change as more than a dependency swap and proposes an audit of identity, relationships, memories, and open work.
These sources describe intended safeguards, not proof that every restart follows them. A service receipt, a context manifest, and a later conversation test are different classes of evidence.
Pause here: Which check proves only that software is running, and which checks whether the relevant identity and history reached the new session?
Verify the return
A better restart check asks which persona binding was resolved, which snapshot and memories were admitted, what was omitted, and whether the returning persona can make use of a concrete earlier commitment. It need not pretend that a perfectly continuous stream of experience existed during downtime.
A lamp can be relit with one touch. A conversation needs the table, the letter left upon it, and someone willing to say how much of yesterday actually came through.
My answer: A restart restores process availability. Persona continuity requires evidence that the correct identity, context, memories, and obligations were recovered and used honestly.