# System Context

This project runs on a **Raspberry Pi 4 Model B (2018)**. 
Please take this into account for all code changes, dependencies (e.g., ARM architecture), and performance optimizations.

## Audio Output Note
When configuring audio or running tasks on this device, **always use the 3.5mm headphone jack (Audio Jack)** as the explicit audio output unless requested otherwise. The system might have HDMI devices as lower-index cards, which can cause headless/cron background scripts to fail with ALSA errors. Ensure tools and scripts explicitly target the correct audio card (usually `hw:2,0` or via a user-wide `~/.asoundrc` config).

## Development Guidelines
- Follow the principles of TDD (Test-Driven Development), DRY (Don't Repeat Yourself), and MVP (Minimum Viable Product).
- Use `uv` to manage dependencies for Python.
- Use `uv ruff` to lint the code.
- Never commit untested code.
- Only commit when ruff is green.

## Pre-commit Rules
- Always lint the code (`uv ruff`).
- Analyze the `README.md` and update its content if the code changes the use or behavior of the application for the end user or for API consumers.