hermes-agent/contributors/emails/deusyu@users.noreply.github.com
teknium1 11cb9e571f fix: harden /model --once against persistence and config-sync leaks
Fixes the two review defects that kept PR #29923 open, plus docs:

- gateway: exclude --once from the session-store write-through. The
  once-override lived only in memory before, but the write-through
  persisted it, so a gateway restart before the finally-restore
  rehydrated a supposedly one-turn model permanently.
- TUI: skip _sync_agent_model_with_config while a one-turn restore is
  pending. The once-model is deliberately not pinned as a session
  model_override, so the config sync saw a model mismatch and clobbered
  the once-override back to the config model before the turn ran.
- tests: real _handle_model_command drive asserting --once never
  touches set_model_override while --session still does; restore-pop
  idempotency.
- docs: /model --once in configuring-models.md with an honest
  prompt-cache cost note (one-shot switch breaks the cached prefix
  twice; wins for short sessions and cheap-to-expensive escalation).
2026-07-18 14:01:56 -07:00

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