Self-refreshing playlists for Spotify listeners, built from their own listening history and rebuilt every Monday.
The streaming-history export records how long each play lasted. A track whose completion held steady until you stopped is forgotten and comes back. One you kept skipping out of before the plays stopped never does.
One strategy follows the tracks you habitually play next to your favourites. Others pull what was on repeat this week in past years, what belongs to your 2am, and new artists via Last.fm.
One Cloudflare Worker serves the app, holds the Spotify tokens, keeps your history in D1 and runs the weekly cron. Each run folds in the latest 50 plays and can keep a dated archive.
