11b4a21a5 cleared the per-session _last_resolved_model cache on /new and
the compression-exhausted auto-reset, so a resumed/reset conversation
resolves the model from current config instead of a stale cached value
(#58403). Three other sites documented as the same "full conversation
boundary" treatment — pop _session_model_overrides, clear the reasoning
override, pop _pending_model_notes — still missed _last_resolved_model:
- _session_expiry_watcher's permanent finalization block (gateway/run.py):
a session that goes idle and is finalized, then resumed, could serve a
model cached before it went idle on a transient config-cache miss.
- The daily/idle/suspended auto-reset cleanup (_was_auto_reset handling,
gateway/run.py): same failure mode, different trigger.
- /resume (gateway/slash_commands.py), whose own comment already says
"conversation boundary just like /new" for the sibling dicts it clears.
Fix: pop the session's _last_resolved_model entry in all three, mirroring
the exact pattern 11b4a21a5 established.
srojk34
cdcbc3a31d