A readable state.db can still reject every message write through the
messages_fts* triggers when the FTS5 index is corrupt: base-table reads and
PRAGMA integrity_check pass, but INSERT INTO messages fails with 'database
disk image is malformed'. The gateway reloads conversation_history from disk
each turn, so a silently-failed write hands the next turn stale/empty history
even though the same cached AIAgent still holds the live transcript — causing
immediate same-session amnesia. (#50502)
- hermes_state.py: _db_opens_cleanly() now drives a rolled-back message write
through the FTS triggers, so write-only corruption (which the read-only
probe reported healthy) is detected. repair_state_db_schema() gains an
in-place FTS5 'rebuild' strategy (tier 0) before the dedup/drop tiers, plus
an already_healthy short-circuit. Both 'hermes sessions repair' and
'hermes doctor' route through these, so the fix covers the whole class.
- hermes_cli/doctor.py: the state.db check runs the write-health probe even on
the success (readable) path and repairs in place with --fix.
- gateway/run.py: _select_cached_agent_history() prefers the cached agent's
longer live _session_messages over a shorter persisted transcript, so an
FTS write failure can't wipe in-session context.
- tests: regressions for write-health detection, in-place repair preserving
rows + resuming writes, the already_healthy shortcut, and the gateway guard.
Combines the approaches from #50504 (@0-CYBERDYNE-SYSTEMS-0, issue author),
#52165 (@davidgut1982), and #50576 (@trevorgordon981).
0b7128582f