# 04-01 Summary

## Outcome

Replaced the Matrix real backend's custom `AgentSessionClient` path with a shared
`AgentApiWrapper` over upstream `lambda_agent_api.AgentApi`.

## Changes

- Added `sdk/agent_api_wrapper.py` to capture `MsgEventEnd.tokens_used` without
  modifying `external/`.
- Rewrote `sdk/real.py` to use a shared `agent_api`, stream text chunks from
  `AgentApi.send_message()`, and emit a final `MessageChunk` with
  `last_tokens_used`.
- Updated `adapter/matrix/bot.py` to construct `RealPlatformClient` with
  `AgentApiWrapper`, keep `AGENT_WS_URL` unchanged, and manage
  `agent_api.connect()` / `agent_api.close()` around `sync_forever()`.
- Stubbed `sdk/agent_session.py` as a compatibility placeholder.
- Updated Matrix/runtime tests away from `thread_key` and per-request websocket
  assumptions.

## Verification

- `pytest tests/platform/test_real.py -q`
- `pytest tests/adapter/matrix/test_dispatcher.py -q`
- `pytest tests/core/test_integration.py -q`
- `pytest tests/platform/test_agent_session.py -q`

All listed commands passed locally.
