GitHub

GitHub scores 58.099999999999994/F on the Designesy Compliance Index — 21 of 40 checks passed, 6 failed, 8 warned, 2 skipped. The cohort mean is 62.2/D across 30 scored sites. GitHub sits 7% below the cohort mean.

Strongest category: Poise at 100.0%. Weakest scored category: Accessibility at 50.0%. The gap between best and worst is the finding — most systems are strong in one dimension and absent in another.

Since last week's score, GitHub dropped by 11.9 points — moving from 70 to 58.099999999999994.

The engine detected 585 custom properties at :root — a rich token layer. The question is whether those tokens are structured (primitive → semantic → component) or flat.

F-grade means GitHub scores below 60 — the contract's pass threshold. The failing checks are not subjective: they are missing CSS primitives that the contract requires at :root.

This evaluation is deterministic — no LLM, no human judgment, no survey. The same 40-check engine that scored GitHub scores every site on the leaderboard. Re-score github.com live to see if anything has changed since 2026-08-03.