CLI `_rewind_persisted_user_turn`, TUI `_rewind_active_session_history` and gateway
`rewind_session` each re-ran get_active_message_ids -> get_messages_as_conversation ->
split_user_originated_turn -> rewind_to_message with their own warm/durable comparison
helpers and three different out-of-range contracts (RuntimeError / ValueError / None).
The durable transcript is the authority for a rewind, so the implementation now lives
with the data: `SessionDB.rewind_user_turn` (hermes_state_rewind.py) with one typed
out-of-range error (`RewindTargetUnavailableError`). Surfaces keep only lock, eviction
and rendering glue and map that error to their own message.
Review findings on the salvage (all reproduced with a real SessionStore):
1. Primary persisted-agent path skipped the boundary. The agent's turn-start
flush already persists the user row stamped with the inbound platform id, so
`has_platform_message_id` saw THIS turn's own row, took the "duplicate" branch
and skipped the whole block — including the new assistant boundary. The
transcript stayed `[..., 'user']`, exactly the open tail #107070 is about.
Fresh sessions hid it a second way: `session_meta` is appended after the
agent-flushed user row, so a naive "newest row" tail read sees `session_meta`.
2. The exception fallback appended the boundary unconditionally; a redelivery of
an already-closed turn produced `['user', 'assistant', 'assistant']`.
3. The exception fallback wrote the user row + boundary before classifying a
400/500-on-long-session as overflow, growing a session that is already too
large (the #1630 no-grow rule the persist path honours).
Fix: `SessionDB.latest_conversation_role()` (newest active row excluding the
`session_meta`/`system` bookkeeping rows the model never sees) behind
`SessionStore.transcript_tail_role()`, which resolves the same route
`load_transcript` reads via the existing `_compression_tip_for_session_id`.
One `_hmwa_close_failed_turn()` appends the boundary iff that tail is an open
user row; both the persist path and the exception fallback call it, so the
user-row dedupe no longer gates the boundary and a redelivery never stacks.
The overflow verdict in `_hmwa_agent_error_reply` is an early return ahead of
every transcript write. The `failed_turn_notice` kwarg and its dead
`or _hmwa_failed_turn_notice(...)` fallback are gone; the notice is derived
where each consumer needs it.
Tests (each red with the production change reverted, green here): boundary
keyed on the durable tail with the user write deduped (agent-flushed row →
closed; redelivery → nothing); fresh-session agent-flushed failed first turn
closed despite `session_meta` (real store); exception-path redelivery adds no
second boundary (real store, every lineage location, contract asserted from
store state); exception-path overflow persists nothing. Live E2E:
`evals/gateway_failure_ownership/probe.py` (real AIAgent + fixture provider)
20/20; the two `failed provider input` turns that previously left an open user
tail now close with the "not processed" row.
Namespace delivery markers and assign fresh keyless turn identities instead
of inferring ownership from IDs or process-local row baselines. Query only
marker existence on the canonical live compression continuation and ancestors.
Preserve raw reply IDs and exclude metadata from provider wire messages.
Expand the two existing invariants with resumed cross-chat ID collisions,
a real independent SQLite writer, reaped siblings, and archived-history
allocation controls. All 20 full-handler checkpoints and 63 targeted tests pass.
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.
