Next.js Evals Skills — Testing skill for Claude Code
Next.js evaluation and testing skills.
How to install Next.js Evals Skills
This entry records only its repository, not the path inside it, so there is no
exact command to give. Open wsimmonds/claude-nextjs-skills and copy the folder into
~/.claude/skills/, or the file into ~/.claude/agents/.
What Next.js Evals Skills does
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.
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README
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) |
...
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