nedcodes-ok Cursor Rules Collection
Battle-tested rules for AI coding agents. Every rule has been verified to actually change agent output — if a rule didn't produce measurably different code in testing, it's not here.
What's Included
| Skill | Impact | What It Covers |
|---|---|---|
| react-patterns | HIGH | Hooks, composition, memoization, Server Components |
| nextjs-app-router | HIGH | App Router, Server Actions, caching, revalidation |
| typescript-strict | HIGH | Strict mode patterns, branded types, discriminated unions |
| express-api | HIGH | Middleware, error handling, validation, security headers |
| python-backend | HIGH | Type hints, async patterns, Pydantic, structured errors |
| error-handling | CRITICAL | Error boundaries, recovery, user-facing messages |
| security | CRITICAL | Auth, injection prevention, XSS, CSRF, secrets |
| testing-patterns | HIGH | Test structure, mocking, coverage, edge cases |
| api-design | MEDIUM | REST conventions, validation, versioning, pagination |
| performance | HIGH | Lazy loading, caching, bundle size, code splitting |
When to Apply
Use these rules when:
- Writing new components, APIs, or backend services
- Refactoring existing code for better patterns
- Reviewing code for common mistakes
- Setting up new projects with good defaults
What Makes These Different
Every rule contains something you can't get from a generic LLM prompt:
- Version-specific gotchas (e.g., Express 5 vs 4 patterns)
- Tested edge cases with before/after examples
- Anti-patterns with explanations of why they fail
- Framework-specific patterns, not language-generic advice
Related Tools
- cursor-doctor — lint your rules, detect conflicts, see load order
- Full collection — 98 rules across 30+ frameworks