# Handover: Filesystem-Edit-MCP Timeout Fix

## Status
- **Implementation**: COMPLETED. Added 60s timeouts to all backend MCP calls in `src/my_mcp/server.py`.
- **Verification**: PARTIAL. Core logic verified via manual code inspection and basic unit tests (sync). Integration tests are currently failing due to environment issues.

## Critical Issue: Testing Environment
The `fastmcp` package hangs indefinitely upon import in the current environment. This prevents `pytest` from running any tests that involve the MCP client.

### Symptoms
- `import fastmcp` never returns.
- `pytest` hangs during collection or at the start of the first test.
- The issue persists even with a clean `.venv` and cleared caches.

### Attempted Solutions
- Session-scoped fixtures to reuse the MCP client (to avoid multiple `npx` startups).
- Manual `asyncio.run` scripts (also hang on import).
- Python 3.13 venv usage.

## Required Next Steps
1. **Fix Environment**: Investigate why `fastmcp` hangs on import. It may be related to its dependencies (e.g., `pyperclip` or `watchfiles`) in the current Linux/WSL environment.
2. **Verify Integration**: Once `fastmcp` is importable, run `pytest tests/test_server.py`.
3. **Verify Timeout**: 
   - Temporarily set `BACKEND_TIMEOUT = 0.1` in `server.py`.
   - Run a test call to `read_text_file`.
   - Confirm it raises `RuntimeError` with the expected timeout message.

## Code Changes Reference
- `src/my_mcp/server.py`:
  - Added `BACKEND_TIMEOUT` constant.
  - Wrapped `backend.call_tool` in `asyncio.wait_for`.
  - Added `try...except TimeoutError` with user-friendly messages.
- `tests/conftest.py`: Updated with session-scoped fixtures (ready for use once `fastmcp` works).
- `pyproject.toml`: Set `asyncio_default_fixture_loop_scope = "session"`.
