PR #29211 review findings:
1. test_retry_replacement: pin DEFAULT_DB_PATH so SessionDB() doesn't write
to the real ~/.hermes/state.db. Same fix as the other DB-only fixtures.
2. yuanbao recall branch A1 (message_id exact match) was structurally dead
once load_transcript() became DB-only — state.db never preserves the
platform message_id. Removed the dead loop, consolidated to a single
content-match branch (renamed 'A: content match'). Branch B (system
note) unchanged. Updated the test name + docstring to reflect this.
Note: self._lock is no longer taken in append_to_transcript (was guarding
the JSONL file append). SQLite append_message handles its own concurrency
via WAL mode, so this is safe; flagging for awareness.
Fixtures that instantiate SessionStore() trigger SessionDB() with no args,
which resolves to ~/.hermes/state.db via the DEFAULT_DB_PATH module constant
(snapshot of get_hermes_home() at hermes_state import time).
The autouse _hermetic_environment fixture in tests/conftest.py monkeypatches
HERMES_HOME env, but DEFAULT_DB_PATH is already cached by then. Per-test
monkeypatch.setattr(hermes_state, 'DEFAULT_DB_PATH', tmp_path/'state.db')
forces the DB into tmp_path so the tests can't leak into the real profile.
Verified by counting u1-prefixed sessions in real state.db before/after:
delta=0.
Yuanbao's recall feature was reading the gateway JSONL directly to look up
messages by platform message_id, which state.db does not preserve. Migrated
to use load_transcript() which returns DB messages.
Recall branch A1 (message_id match) now falls through to A2 (content match)
or B (system note) for all sessions — a documented degradation. Follow-up
issue: add platform_message_id column to state.db messages to restore
exact-id matching.
yoniebans