Ranks provider search results against Spotify track metadata using slugs, RapidFuzz ratio scoring, exact ISRC matches, and multiple heuristic fixups for artist/title noise. The algorithm is self-contained in its logic and can be extracted and reused for any song-to-result matching problem.

Writes track metadata, cover art, and lyrics into MP3, M4A, FLAC, OGG, OPUS, and WAV files in a format-agnostic way. Isolated from download/network concerns, making it directly reusable in other music library or audio processing pipelines.

Defines the AudioProvider interface and shared search/result-ordering behavior used by YouTube, YouTube Music, SoundCloud, BandCamp, and Piped providers. Demonstrates a clean strategy pattern for swapping and chaining external content sources.

Tracks already-processed URLs and skip-file entries so bulk downloads can be resumed without re-downloading completed tracks. The archive pattern is portable to any job/pipeline needing idempotency and resumability.

Walks the GitHub Contents API tree and downloads all files from a remote repository directory, used for fetching the bundled web UI. It is a self-contained utility for retrieving versioned external assets at runtime or build time.

Builds a dynamic settings model that merges CLI arguments, JSON config file values, and defaults, including backward-compatible migration for legacy config paths. This is a reusable pattern for CLI tools that need persistent, overridable, validated configuration.