# Todo 31: Runtime Persistence

## Status

done

## Goal

Persist live WebSocket runtime data into the SQLite session store so completed turns can be replayed through the REST APIs.

## Scope

- Add an optional `session_id` to `DebugRunRequest`.
- Let the WebSocket runtime create or reuse a persisted session.
- Persist Agent config snapshots when a session is created or reused.
- Persist user and assistant messages for each turn.
- Persist audit entries with turn and round indexes.
- Persist one usage row per ChatAgent model call.
- Continue turn indexes for an existing persisted session.

## Verification

- Runtime tests prove session creation, turn/message persistence, audit rows, usage rows, and existing-session turn indexes.
- Existing queue, audit, WebSocket, and store tests still pass.
- `uv run pytest tests/test_sqlite_store.py tests/test_debug_runtime.py tests/test_websocket_api.py -q` passes: 55 tests.
- `uv run pytest` passes: 66 tests.