# Todo 17 Agent Config, Audit, and Mock Tools Plan

**Status:** done

## Goal

Align ChatAgent/EventAgent config, add extra provider body defaults, default EventAgent to one round, add mock tools, audit events, and backend logger calls.

## Design

- `AgentParams` becomes the shared model for model, temperature, max tokens, system prompt, and `extra_body`.
- `EventAgentParams` extends shared agent params with enabled tools and `max_event_loops`, defaulting to one round.
- `OpenAICompatibleChatClient` merges `extra_body` into the request payload.
- `ToolRegistry` exposes several mock tools for the UI while still giving ChatAgent name/description-only event tools.
- `DebugRuntime` emits `audit` output events for key pipeline transitions and logs them through `logging`.

## Files

- Modify: `src/agent_lab/application/contracts.py`
- Modify: `src/agent_lab/application/runtime.py`
- Modify: `src/agent_lab/application/tools.py`
- Modify: `src/agent_lab/infrastructure/chat_client.py`
- Modify tests in `tests/test_debug_runtime.py`, `tests/test_websocket_api.py`, and `tests/test_ws_smoke.py`.

## Verification

- Focused backend tests prove:
  - ChatAgent and EventAgent share agent config fields.
  - `extra_body` is merged into provider payloads.
  - EventAgent defaults to one round.
  - `/api/tools` exposes multiple mock tools.
  - Runtime emits audit events and logger records key events.
- Full suite passes.

## Result

- Added shared ChatAgent/EventAgent config fields: `system_prompt` and default `extra_body`.
- Set EventAgent to one event round by default.
- Added `mock_search` and `mock_ticket` to the default tool registry.
- Added runtime audit output events and logger entries for session, round, event, and EventAgent transitions.
- Verified with `uv run pytest` (`42 passed`, one existing Starlette deprecation warning).