Files
hermes-agent/agent
Teknium 06a2d77372 fix(compression): gate todo-snapshot merge on real-user tails, refresh stale snapshots
Follow-up hardening on the salvaged merge-into-trailing-turn fix:

- Merge only into REAL user tails (_is_real_user_message probe). Merging
  into scaffolding tails (continuation marker, summary-as-user handoff)
  would upgrade them to real-user evidence after SessionDB projection
  strips the flags, breaking zero-user provenance (#69292 -
  _is_synthetic_compression_user_turn keys on the TODO_INJECTION_HEADER
  content marker, which merge-at-tail would bury mid-content).
- Strip a previously merged snapshot block before re-injection so
  repeated boundaries refresh rather than accumulate todo state, and
  refresh a bare stale snapshot row in place instead of stacking a
  duplicate (empty/stale-skip semantics from #26981 by @YLChen-007).
- Scaffolding tails keep the flagged standalone append (pre-#53890
  status quo; adjacent user rows are repaired downstream by
  repair_message_sequence / _merge_consecutive_roles).
2026-07-23 07:25:44 -07:00
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