Both flagged by pre-release Opus advisor; both clearly defensive and small
enough to absorb in-release per the reviewer-flagged-fix-in-release-not-followup
policy.
SHOULD-FIX #1 (api/routes.py:_clear_stale_stream_state, ~25 LOC):
After the metadata-only reload (#1559 Layer 2), the local 'session'
variable is reassigned to the full-load object but the caller still holds
the original metadata-only stub. /api/session then returns the stale
active_stream_id at routes.py:1791, causing the frontend to attempt one
ghost SSE reconnect before recovering. Fix: capture original_stub at
function entry, then patch its in-memory active_stream_id and pending_*
fields to None after both the early-return (full-load already cleared)
path AND the successful-mutation path. Now the caller's read returns
fresh state, no ghost reconnect.
SHOULD-FIX #2 (api/models.py:Session.save, ~20 LOC):
The .bak write at api/models.py:436 used write_text() which truncates-
then-writes — a crash mid-write or concurrent backup-producing save
could leave a torn .bak. Recovery defends correctly (JSONDecodeError →
returns -1 → 'no_action'), so the failure mode was 'backup lost' not
'spurious restore'. Fix: tmp + os.replace pattern matching the main file
write at line 446-453. Now backup either lands cleanly or doesn't land
at all.
4026/4026 tests pass post-absorb.
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