lab-notes
Deploy quality: why two Lighthouse runs disagree (2026)
Two Lighthouse runs on the same deployed AI-builder output rarely return the same score, and that is the most-contested observation in the lab notebook for the four June 2026 BuilderProof axes. This note documents the variance phenomenon, the reproducibility protocol the next iteration will adopt, and where median-of-five runs out of road. No score from the published table is changed.
15 min read10