Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/pymodel/react-frontend-skills/nextjsnpx skills add PyModel/react-frontend-skills --skill nextjsgit clone --depth 1 https://github.com/PyModel/react-frontend-skillsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00051 | $0.01226 |
| Opus 5 | $0.00026 | $0.00613 |
| Sonnet 5 | $0.00010 | $0.00245 |
| Haiku 4.5 | $0.00005 | $0.00123 |
Grade A, and why
nextjs scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Next.js Community Next.js 16 App Router Best Practices
Comprehensive performance optimization guide for Next.js 16 App Router applications, maintained by the Next.js Community. Contains 40 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.
When to Apply
Reference these guidelines when:
- Writing new Next.js 16 App Router code
- Configuring caching strategies with 'use cache' directive
- Implementing server components and data fetching
- Setting up routing with parallel and intercepting routes
- Creating server actions for form handling and mutations
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | Build & Bundle Optimization | CRITICAL | build- |
| 2 | Caching Strategy | CRITICAL | cache- |
| 3 | Server Components & Data Fetching | HIGH | server- |
| 4 | Routing & Navigation | HIGH | route- |
| 5 | Server Actions & Mutations | MEDIUM-HIGH | action- |
| 6 | Streaming & Loading States | MEDIUM | stream- |
| 7 | Metadata & SEO | MEDIUM | meta- |
| 8 | Client Components | LOW-MEDIUM | client- |
Quick Reference
1. Build & Bundle Optimization (CRITICAL)
build-optimize-package-imports- Configure optimizePackageImports for Icon Librariesbuild-dynamic-imports- Use Dynamic Imports for Heavy Componentsbuild-barrel-files- Avoid Barrel File Imports in App Routerbuild-turbopack-config- Configure Turbopack at the top levelbuild-external-packages- Configure Server External Packages for Node Dependencies
2. Caching Strategy (CRITICAL)
cache-use-cache-directive- Use 'use cache' with Cache Componentscache-revalidate-tag- Use revalidateTag with cacheLife Profilescache-fetch-options- Configure Fetch Cache Options Explicitlycache-revalidate-path- Use revalidatePath for Route-Level Cache Invalidationcache-react-cache- Use React cache() for Request Deduplicationcache-segment-config- Match route configuration to the active cache model
What ships with it
41 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- AGENTS.md 6.7 KB
- references/action-error-handling.md 1.7 KB
- references/action-optimistic-updates.md 1.8 KB
- references/action-pending-states.md 1.6 KB
- references/action-revalidation.md 2.1 KB
- references/action-server-action-forms.md 1.9 KB
- references/build-barrel-files.md 1.2 KB
- references/build-dynamic-imports.md 1.5 KB
- references/build-external-packages.md 1.1 KB
- references/build-optimize-package-imports.md 1.3 KB
- references/build-turbopack-config.md 2.0 KB
- references/cache-fetch-options.md 1.9 KB
- references/cache-react-cache.md 1.7 KB
- references/cache-revalidate-path.md 1.6 KB
- references/cache-revalidate-tag.md 1.9 KB
- references/cache-segment-config.md 2.1 KB
- references/cache-use-cache-directive.md 2.2 KB
- references/client-children-pattern.md 1.9 KB
- references/client-hydration-mismatch.md 1.6 KB
- references/client-third-party-scripts.md 1.7 KB
- references/client-use-client-boundary.md 1.9 KB
- references/meta-generate-metadata.md 1.8 KB
- references/meta-opengraph-images.md 1.7 KB
- references/meta-robots.md 1.4 KB
- references/meta-sitemap.md 1.8 KB
- references/route-intercepting-routes.md 1.9 KB
- references/route-not-found.md 1.5 KB
- references/route-parallel-routes.md 1.9 KB
- references/route-prefetching.md 1.8 KB
- references/route-proxy-ts.md 1.9 KB
- references/server-avoid-client-fetching.md 1.8 KB
- references/server-component-streaming.md 1.7 KB
- references/server-data-colocation.md 1.7 KB
- references/server-error-handling.md 1.6 KB
- references/server-parallel-fetching.md 1.7 KB
- references/server-preload-pattern.md 1.8 KB
- references/stream-error-tsx.md 1.7 KB
- references/stream-loading-tsx.md 1.6 KB
- references/stream-nested-suspense.md 2.0 KB
- references/stream-skeleton-matching.md 1.9 KB
- references/stream-suspense-boundaries.md 1.6 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 114 lines · 51 tokens per session scan A df1989e6a355
nextjs is a skill published in the GitHub repository PyModel/react-frontend-skills (3 stars, last pushed 12d ago), licensed MIT. It adds 51 tokens to every session and 1,226 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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