Signal MCP

# CLAUDE.md This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository. ## Commands - Run: `python main.py --user-id YOUR_PHONE_NUMBER [--transport {sse|stdio}]` - Lint: `ruff check .` - Type check: `mypy .` - Format code: `ruff format .` ## Code Style Guidelines - **Imports**: Standard library first, then third-party, then local. Group imports by type. - **Formatting**: Use ruff formatter (Black-compatible). - **Types**: Use strict type annotations. Define custom types for complex structures. - **Naming**: - Functions/variables: snake_case - Classes: PascalCase - Constants: UPPER_CASE - **Error Handling**: Use custom exception classes. Log errors before raising or returning. - **Logging**: Use the established logger pattern with appropriate log levels. - **Async**: Use asyncio for all I/O operations. - **Security**: Always use shlex.quote for shell command arguments.