Years of loved tracks on Last.fm, no way to actually listen to them as a playlist. This pulls a user’s loved tracks (optionally filtered by date range) and builds a new Spotify playlist from them.

The unglamorous core is track matching — Last.fm and Spotify disagree constantly about titles, remaster suffixes, and featured-artist formatting — so the repo includes a calibration script for tuning the matcher against your own library before committing to a full run. Written up with a step-by-step README covering both APIs’ credential hoops, since Spotify’s developer onboarding is most of the difficulty.