implement test server

AGENTS.md

@@ -15,7 +15,8 @@ make
 
 - **C++ Standard**: C++11 (enforced)
 - **Build System**: CMake (generates `compile_commands.json` automatically)
-- **Build Directory**: `/build` (ignored in git)
+- **Build Directory**: `build/` (ignored in git)
+- **PIP Library**: Installed at `/usr/local/include/pip`
 - **Entrypoint**: `src/main.cpp`
 
 ## Dependencies
@@ -42,10 +43,24 @@ clang-format -i src/*.cpp src/*.h
 
 The server creates a `PIKbdListener` that:
 - Captures F10 key press for graceful exit
-- Starts an HTTP server (address printed on startup)
+- Starts an HTTP server on `0.0.0.0:8888`
 - Waits for exit signal via `WAIT_FOR_EXIT` macro
 
+## API Endpoints
+
+| Endpoint | Method | Description |
+|----------|--------|-------------|
+| `/api/connect` | GET | Connects TCP client to 127.0.0.1:1234 |
+| `/api/disconnect` | GET | Disconnects TCP client |
+
+## Testing
+
+Use `reproduce_crash.sh` to test the TCP connect/disconnect functionality:
+```bash
+./reproduce_crash.sh
+```
+
 ## Notes
 
 - Qt Creator is the primary IDE (`.qtcreator/` config present)
-- No tests or CI configured
+- No unit tests or CI configured