Hypothesis: love songs about limerence avoid the home chord, and songs about secure love sit on it.
Sample: the UK and US top 40 from 2025-09-27 to 2026-09-26, ranked by combined weeks, screened in rank order until 100 romantic love songs. Each song is scored for limerence from published sources, before any chord data is read. The repository holds no lyrics.
Status: the scored sample is done. Chord data and the song page are next. See docs/DESIGN.md.