Next.js Evals Skills

Claude Next.js Skills

Claude Next.js Skills is a POC bundle of automations aimed at seeing if creating skills quickly could improve the Next.js eval scores published by Vercel at https://nextjs.org/evals.

**Baseline (before skills)**

Model	Success Rate
Claude Haiku 4.5	32%
Claude Sonnet 4.5	32%

**Skilled Runs (after skills)**

Model	Success Rate	Expected Leaderboard Slot
Claude Haiku 4.5 "Skilled"	78% (39/50)	1
Claude Sonnet 4.5 "Skilled"	76% (38/50)	2

Result Snapshot

Claude Haiku 4.5:

📊 Results: ════════════════════════════════════════════════════════════════════════════════

Eval	Claude Code
000-app-router-migration-simple	✅✅✅ (204.8s)
001-server-component	✅✅✅ (94.4s)
002-client-component	✅✅✅ (94.7s)
003-cookies	✅✅✅ (136.7s)
004-search-params	✅✅✅ (219.1s)
005-react-use-api	✅✅✅ (138.0s)
006-server-metadata	✅✅✅ (91.4s)
007-client-metadata	✅✅❌ (86.0s)
008-generate-static-params	❌✅❌ (83.0s)
009-og-images	✅✅✅ (108.0s)
010-route-handlers	✅✅✅ (69.1s)
011-client-server-form	✅✅✅ (167.9s)
012-parallel-routes	✅✅✅ (157.7s)
013-pathname-server	❌❌❌ (70.8s)
014-server-routing	✅✅❌ (94.0s)
015-server-actions-exports	✅✅❌ (69.6s)

...