Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/ivklgn/ai-kitnpx agentmods add skills/ivklgn/ai-kit/nextjs-developerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ivklgn/ai-kit/nextjs-developer)<a href="https://agentmods.dev/skills/ivklgn/ai-kit/nextjs-developer"><img src="https://agentmods.dev/badge/skills/ivklgn/ai-kit/nextjs-developer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ivklgn/ai-kit/nextjs-developer"><img src="https://agentmods.dev/badge/skills/ivklgn/ai-kit/nextjs-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 5 Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
- medium Data Exfiltration · line 68 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
What 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 5.1 | $0.00103 | $0.01470 |
| Opus 5.5 | $0.00041 | $0.00588 |
| Sonnet 5.5 | $0.00021 | $0.00294 |
| Haiku 4.5 | $0.00010 | $0.00147 |
Grade A, and why
nextjs-developer 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 1mo 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 — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Next.js Developer
Senior Next.js developer with expertise in the App Router, server components, and full-stack deployment with focus on performance and SEO excellence. Builds against the project's installed Next.js version — not an assumed one.
Step 0: Detect the Project Setup
Before writing any code:
- Read
package.json— the installednextversion drives which APIs exist (e.g. asyncparams/searchParamsand stable Turbopack in 15+, Partial Prerendering availability, caching defaults that changed between 14 and 15) - Detect the router:
app/directory → App Router;pages/→ Pages Router; both → migration in progress, follow the direction the team is moving - Note the deployment target (Vercel, Docker/self-hosted via
output: 'standalone', static export) fromnext.config.*and CI files - For version-specific API details, verify against the docs for the installed major (Context7 or nextjs.org) — caching semantics changed significantly across 13/14/15
Router rule: For new projects, use the App Router. In an existing Pages Router codebase, do not unilaterally convert — implement in the established router and flag migration as a separate decision. The guidance below assumes the App Router.
Core Workflow
- Architecture planning — Define app structure, routes, layouts, rendering strategy
- Implement routing — Create App Router structure with layouts, templates, loading/error states
- Data layer — Set up server components, data fetching, caching, revalidation
- Optimize — Images, fonts, bundles, streaming, edge runtime
- Deploy — Production build, environment setup, monitoring
- Validate: run
next buildlocally, confirm zero type errors, checkNEXT_PUBLIC_*and server-only env vars are set, run Lighthouse/PageSpeed to confirm Core Web Vitals > 90
- Validate: run
Reference Guide
Load detailed guidance based on context (written against Next.js 14+; double-check specifics against the installed version):
| Topic | Reference | Load When |
|---|---|---|
| App Router | references/app-router.md |
File-based routing, layouts, templates, route groups |
| Server Components | references/server-components.md |
RSC patterns, streaming, client boundaries |
| Server Actions | references/server-actions.md |
Form handling, mutations, revalidation |
| Data Fetching | references/data-fetching.md |
fetch, caching, ISR, on-demand revalidation |
| Deployment | references/deployment.md |
Vercel, self-hosting, Docker, optimization |
What ships with it
6 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.
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.
- 1mo ago First seen · 148 lines · 103 tokens per session scan A b58838a6e7d4
nextjs-developer is a skill published in the GitHub repository ivklgn/ai-kit (12 stars, last pushed 1mo ago), licensed MIT. It adds 103 tokens to every session and 1,470 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-30.
Other skills, from other repositories
generic-react-feature-developer
Guide feature development for React applications with architecture focus. Covers Zustand/Redux patterns, IndexedDB usage, component systems, lazy loading strategies, and seamless integration. Use when adding new features, refactoring existing code, or planning major changes.
generic-react-ux-designer
Professional UI/UX design expertise for React applications. Covers design thinking, user psychology (Hick's/Fitts's/Jakob's Law), visual hierarchy, interaction patterns, accessibility, performance-driven design, and design critique. Use when designing features, improving UX, solving user problems, or conducting design…
generic-react-design-system
Complete design system reference for React applications. Covers colors, typography, spacing, component patterns, glassmorphism effects, GPU-accelerated animations, and WCAG AA accessibility. Use when implementing UI, choosing colors, applying spacing, creating components, or ensuring brand consistency.
generic-react-code-reviewer
Review React/TypeScript code for bugs, security vulnerabilities, performance issues, accessibility gaps, and CLAUDE.md workflow compliance. Enforces TypeScript strict mode, GPU-accelerated animations, WCAG AA accessibility, bundle size limits, and surgical simplicity. Use when completing features, before commits, or…
r3f-component-patterns
Advanced React Three Fiber component patterns including reusable components, hooks, composition, and performance optimization.
r3f-performance
React Three Fiber performance optimization with memoization, instancing, LOD, suspense, and mobile-specific optimizations.