Twelve pieces, one dial: what sells, or what lasts.

Rewear ranks a real H&M customer's next twelve recommendations, then lets you decide how much to trade purchase likelihood for lower-impact materials, staples over one-offs, and less of the best-seller rail. Drag the dial and watch the rail reorder — and what it costs.

Recommendations are precomputed from a LightGBM ranker over multi-source candidates. Accuracy is MAP@12 on a held-out week with a 95% bootstrap interval. Code and write-up.