# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project Overview

**Musiksammlung** is a Python CLI tool that automates digitizing physical CD collections for use with Jellyfin. It orchestrates: CD ripping (via `abcde`), OCR of cover/back images (via Tesseract), LLM-based tracklist extraction, file renaming/tagging, and M3U playlist generation.

## Build & Development Commands

```bash
pip install -e ".[dev]"          # Install in editable mode with dev deps
pytest tests/ -v                 # Run all tests
pytest tests/test_models.py -v   # Run a single test module
ruff check src/ tests/           # Lint
musiksammlung --help             # CLI entry point
```

## Architecture

The pipeline flows: **OCR → LLM → Organize → Tag → Playlist**

- `models.py` — Pydantic models (`Album`, `Disc`, `Track`) shared across all modules; the LLM JSON output validates directly into `Album`
- `cli.py` — Typer CLI with three commands: `scan` (OCR+LLM→JSON), `apply` (JSON→files), `process` (full pipeline)
- `ocr.py` — Tesseract wrapper with Pillow-based image preprocessing
- `llm_parser.py` — Sends OCR text to LLM (Ollama or OpenAI-compatible), enforces JSON output, retries on parse failure
- `organizer.py` — Builds source→target file mapping, handles single-disc and multi-disc layouts
- `tagger.py` — Sets audio tags via mutagen (format-agnostic), optional cover embedding for FLAC/MP3
- `playlist.py` — Generates M3U playlists with relative paths
- `ripper.py` — Drives `abcde` via subprocess for CD ripping
- `cover.py` — Resizes/converts cover images to JPEG for Jellyfin

## Conventions

- Python 3.11+, German variable names and comments are acceptable
- Pydantic for data models, Typer for CLI, mutagen for audio tagging
- External tools required at runtime: `tesseract`, `abcde`
- The two-step workflow (`scan` → review JSON → `apply`) is the recommended default over the one-shot `process` command