#ttfb

Sunsetting binary 'first-build success' from BuilderProof's H2 2026 rankings (and what replaces it)

Effective with the H2 2026 ranking, BuilderProof retires binary 'first-build success' as a scored axis. The signal saturated across the seven-builder cohort. It becomes a precondition (must pass to be ranked) and the rank weight moves to time-to-first-functional-build, measured as p50 and p90 over six trials on the v1 prompt set.