Design Systems · Evaluation
GitHub Primer
Compliance Index score
82.4/100 · B
= flat since last week
Per-category breakdown
Each category is scored independently. The cohort average shows how this site compares to the 30-site cohort in each dimension.
Evaluation
GitHub Primer scores 82.4/B on the Designesy Compliance Index — 25 of 42 checks passed, 2 failed, 5 warned, 7 skipped. The cohort mean is 69.3/D across 30 scored sites. GitHub Primer sits 19% above the cohort mean.
Strongest category: Poise at 100.0%. Weakest scored category: Motion at 50.0%. The gap between best and worst is the finding — most systems are strong in one dimension and absent in another.
The engine detected 521 custom properties at :root — a rich token layer. The question is whether those tokens are structured (primitive → semantic → component) or flat.
This evaluation is deterministic — no LLM, no human judgment, no survey. The same 42-check engine that scored GitHub Primer scores every site on the leaderboard. Re-score primer.style live to see if anything has changed since 2026-08-03.
Scored 2026-08-03 against contract v0.4.0 (42 checks, 14 weighted categories). Re-scored weekly via GitHub Action.
Compared to Design Systems peers
GitHub Primer ranks #3 of 14 in the Design Systems category.
Cohort context
This site
82.4/100
Cohort mean
69.3/100
Cohort median
70.0/100
Delta from mean
+13.1
Why this site is scored
Contract-adjacent