Review follow-up for #106276: the compensating UPDATE can succeed and the
session row can still be retired before the verification read-back runs.
That window raised the same RuntimeError as a genuine restore mismatch.
Accept the absent session (warn + return) exactly like the pre-update
deletion window, keep strict verification for a surviving row, and add a
regression test that deletes the session after the UPDATE commits.
[salvage: test hunk dropped from this pick, see previous commit]
The exact-row rollback in restore_compression_failure_cooldown_row raised
RuntimeError when its UPDATE hit rowcount == 0, so a session row retired or
expired mid-attempt (e.g. by the maintenance sweep) crashed the turn
dispatcher during the compression summary failure path (#106271). A missing
session row means the cooldown died with it: nothing is left to restore, so
treat rowcount == 0 as a tolerated no-op (warn + return, skipping read-back
verification), mirroring the existing early-return for snapshots taken while
the session already did not exist. Write and verification failures still
propagate.
[salvage: contributor test file dropped from this pick; regression tests are carried from #106277 and trimmed to two invariants]
hermes_state.py: delete every '# noqa: F401 (re-exported...)' import block (hermes_state_common/errors/guard/
readpool/sessions/fts/dbfile/wal/repair/registry + agent.context_compressor _DB_PERSISTED_MARKER_KEY); keep
only the names hermes_state.py itself uses, without noqa.
hermes_state_registry.py: drop get_shared_session_db/release_shared_session_db/close_shared_session_dbs
aliases; every caller (gateway/, tools/, tui_gateway/, cron/, mcp_serve, run_agent, tests) now imports
acquire/release/close_all/release_or_close from hermes_state_registry.
hermes_state_titles.py: drop set_auto_title_if_empty shim (title_generator keeps its getattr fallback).
Re-remove shim-only names restored by 34abf954bd: latest_user_message_row_id (tests call
latest_message_row_id(key, role='user'); role-targeting assertions kept) and get_session_activity (tests
build the snapshot via agent.session_activity.build_activity_snapshot over db.get_session(sid)).
hermes_state_wal._log_once resolves its dedupe sets as module globals instead of via hermes_state;
hermes_state_repair helpers call module globals directly (tests patch hermes_state_repair.<name>).
Frozen updater surface untouched (update_cmd_maint imports only SessionDB from hermes_state).
For each issue anchor present in BASE 63279301bc non-test .py and absent on HEAD, the BASE comment/docstring block was re-attached at the HEAD location of the code it explained (matched by the distinctive code line / enclosing def). Sentences already covered by an existing HEAD comment were deduped; the issue number always survives. Insert-only: no code lines changed.
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