# GEMINI.md

## Documentation Status
- Synced with the post-refactor baseline on 2026-04-07 (source of truth: `CHANGELOG.md`).

This document provides a comprehensive overview of the Video Library Manager (VLM) project, intended to be used as instructional context for Gemini.

## Project Overview

The Video Library Manager (VLM) is a Python-based CLI tool designed for managing personal video collections. It emphasizes a "safety-first" and "human-in-the-loop" approach, ensuring that no file operations are performed without explicit user confirmation and that all actions are reversible through a rollback mechanism.

**Core Functionality:**

*   **Scanning & Parsing:** Discovers video files, extracts metadata. Proactively detects `ffprobe` for video properties with graceful fallback to file-level metadata. Parses filenames for titles, years, seasons, and episodes, with specific support for Anime-style hyphenated numbering and release group stripping.
*   **Metadata Enrichment:** Augments local data with information from TMDB, including bilingual titles and reputation scores. It uses a local SQLite cache to improve performance.
*   **Analysis:** Detects duplicate files (with quality comparisons) and identifies gaps in TV series episodes.
*   **Planning & Execution:** Generates a reviewable JSON-based execution plan for file operations (move, rename, quarantine), validates move/rename sources and destinations against `library_root` during execution, and keeps execution failures isolated per operation.
*   **Plan Review Cycle:** Exports high-risk operations to CSV for manual confirmation (`review-plan`), offers an optional Textual TUI via `review-plan --tui`, and synchronizes user decisions back to the master plan (`apply-review`).
*   **Quarantine Management:** Safely isolates files for review, with full support for listing and restoration.
*   **Reporting:** Creates reports for inventory, duplicate files, and series completeness.
*   **State Management:** Tracks the status of files throughout the organization workflow.

**Technologies:**

*   **Language:** Python 3.10+
*   **CLI Framework:** Click
*   **Configuration:** YAML
*   **Dependencies:** `pyyaml`, `click`
*   **Development:** `pytest` for testing, `hypothesis` for property-based testing.
*   **Package Management:** `uv` is mentioned in the documentation.

**Architecture:**

The project follows a modular structure located in the `src/vlm` directory.

*   `cli.py`: The main entry point for the CLI, using Click.
*   `commands/*.py`: Implementation of the individual CLI commands (scan, parse, enrich, analyze, plan, execute/rollback).
*   `scanner.py`, `parser.py`, `enrichment.py`, `analysis.py`, `planner.py`, `executor.py`: Core logic for the different stages of the workflow.
*   `io.py`: Unified I/O layer for JSON and CSV handling, including validated typed plan loading.
*   `cache.py`: Local SQLite cache for TMDB metadata.
*   `context.py`: CLI context and state management for command execution.
*   `duplicate_resolve.py`: Logic for resolving duplicate files with explicit failure on unsupported or ambiguous inputs.
*   `logging_config.py`: Centralized logging configuration.
*   `plan_review.py`: Risk analysis and manual review generation for execution plans.
*   `quarantine.py`: Management of quarantined files (listing, adding, restoring).
*   `reports.py`: Generation of inventory, completeness, and duplicate reports.
*   `state.py`: File status tracking and persistence (reviewed, ignored, planned, etc.).
*   `providers/tmdb.py`: Client for interacting with the TMDB API.
*   `models.py`: Defines the data structures used throughout the application.
*   `config.py`: Manages application configuration from a YAML file.
*   `utils.py`: General utility functions (formatting, path handling).

## Building and Running

The project uses `uv` for dependency management.

**Installation:**

*   Install dependencies: `uv pip install -e .`
*   Install development dependencies: `uv pip install -e ".[dev]"`
*   Install the optional Textual review UI: `uv pip install -e ".[tui]"`

**Running the application:**

The main entry point is the `vlm` command.

*   Initialize configuration: `uv run vlm config init`
*   Scan the library: `uv run vlm scan`
*   Parse filenames: `uv run vlm parse`
*   Enrich metadata: `uv run vlm enrich`
*   Analyze the library: `uv run vlm analyze`
*   Generate a plan: `uv run vlm plan`
*   Review a plan: `uv run vlm review-plan`
*   Review a plan in the optional TUI: `uv run vlm review-plan --tui`
*   Apply edited review CSV decisions: `uv run vlm apply-review`
*   Execute the plan (dry-run): `uv run vlm execute`
*   Execute the plan (with confirmation): `uv run vlm execute --confirm`
*   Rollback the last execution: `uv run vlm rollback`
*   Generate reports: `uv run vlm report [inventory|completeness|duplicates|summary]`
*   Manage quarantine: `uv run vlm quarantine [list|add|restore]`
*   Manage file states: `uv run vlm state [show|set|query|clear]`

**Running tests:**

*   Run all tests: `uv run pytest`

## Development Conventions

*   **Code Style:** Adheres to PEP 8, uses 4-space indentation, and includes type hints for public functions.
*   **Testing:** Tests are located in the `tests/` directory and written using `pytest`. The project also uses `hypothesis` for property-based testing. New features should be accompanied by tests.
*   **Commits:** Commit messages should be clear and descriptive.
*   **Documentation:** The `README.md` file is very comprehensive and should be kept up-to-date.
*   **Safety:** A core principle is safety. Changes to the filesystem should be gated behind user confirmation (`--confirm`) and be reversible. The tool should never permanently delete files.