Music Trend Recommender · weekly replay

deterministic ranking with inspectable score decomposition, over the checked-in synthetic fixture

Evidence boundary: everything on this page is computed from the repository's synthetic four-week fixture by scripts/build_demo.py using the real scoring code. No real chart data, no credentials, no recommendation-quality claim.

Replay evaluation · deterministic vs seeded Gumbel-Top-k (k=5, 20 seeds)

week	method	precision@k	recall@k	NDCG@k	source coverage

Gumbel rows show mean ± population std over seeds 0-19. Ranking week t uses only state observable at t; the persistence badge marks tracks that remain relevant the following week. Source: arnav-goel10/music-trend-recommender.