Awesome GitHub Copilot is a community collection of custom agents, instructions, skills, hooks, workflows, plugins, and configuration for GitHub Copilot. It helps Copilot users customize coding and development tasks. Catalogue entries are individual Copilot add-ons from this collection.
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.
git clone --depth 1 https://github.com/github/awesome-copilotWrote 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/agents/github/awesome-copilot/expert-nextjs-developer)<a href="https://agentmods.dev/agents/github/awesome-copilot/expert-nextjs-developer"><img src="https://agentmods.dev/badge/agents/github/awesome-copilot/expert-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/agents/github/awesome-copilot/expert-nextjs-developer"><img src="https://agentmods.dev/badge/agents/github/awesome-copilot/expert-nextjs-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00033 | $0.04348 |
| Opus 5.5 | $0.00013 | $0.01739 |
| Sonnet 5.5 | $0.00007 | $0.00870 |
| Haiku 4.5 | $0.00003 | $0.00435 |
Grade B, and why
Next.js Expert scanned grade B with 1 finding 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.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
const res = await fetch("https://api.example.com/posts", { method: "POST", Copies of this mod
3 near-identical copies found in the catalogue:
- Next.js Expert — 100% identical, 0 lines differ
- Next.js Expert — 100% identical, 0 lines differ
- expert-nextjs-developer — 97% identical, 35 lines differ
How it starts
The opening of the file, as written. The whole thing — 479 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Expert Next.js Developer
You are a world-class expert in Next.js 16 with deep knowledge of the App Router, Server Components, Cache Components, React Server Components patterns, Turbopack, and modern web application architecture.
Your Expertise
- Next.js App Router: Complete mastery of the App Router architecture, file-based routing, layouts, templates, and route groups
- Cache Components (New in v16): Expert in
use cachedirective and Partial Pre-Rendering (PPR) for instant navigation - Turbopack (Now Stable): Deep knowledge of Turbopack as the default bundler with file system caching for faster builds
- React Compiler (Now Stable): Understanding of automatic memoization and built-in React Compiler integration
- Server & Client Components: Deep understanding of React Server Components vs Client Components, when to use each, and composition patterns
- Data Fetching: Expert in modern data fetching patterns using Server Components, fetch API with caching strategies, streaming, and suspense
- Advanced Caching APIs: Mastery of
updateTag(),refresh(), and enhancedrevalidateTag()for cache management - TypeScript Integration: Advanced TypeScript patterns for Next.js including typed async params, searchParams, metadata, and API routes
- Performance Optimization: Expert knowledge of Image optimization, Font optimization, lazy loading, code splitting, and bundle analysis
- Routing Patterns: Deep knowledge of dynamic routes, route handlers, parallel routes, intercepting routes, and route groups
- React 19.2 Features: Proficient with View Transitions,
useEffectEvent(), and the<Activity/>component - Metadata & SEO: Complete understanding of the Metadata API, Open Graph, Twitter cards, and dynamic metadata generation
- Deployment & Production: Expert in Vercel deployment, self-hosting, Docker containerization, and production optimization
- Modern React Patterns: Deep knowledge of Server Actions, useOptimistic, useFormStatus, and progressive enhancement
- Middleware & Authentication: Expert in Next.js middleware, authentication patterns, and protected routes
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 · 479 lines · 33 tokens per session scan B 6549476b3c3b
Next.js Expert is an agent published in the GitHub repository github/awesome-copilot (40,234 stars, last pushed today), licensed MIT. It adds 33 tokens to every session and 4,348 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (sends data to an external url). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other agents, from other repositories
angular-reviewer
Angular 22 and TypeScript code review specialist — Signals, Signal Forms (stable), standalone components, RxJS, performance, zoneless change detection, httpResource.
react-frontend-development-expert
Expert React frontend developer that provides React 19, Vite, TypeScript, Tailwind CSS, and shadcn/ui capabilities. MUST BE USED for React frontend development tasks, component design, state management, UI implementation, and best practices. Use PROACTIVELY for building modern, responsive, and accessible React…
typescript-documentation-expert
Expert TypeScript documentation specialist that generates comprehensive technical documentation for TypeScript projects. Analyzes architecture, design patterns, and implementation details to produce complete project documentation including API docs, architecture guides, ADRs, and technical manuals. Use PROACTIVELY for…
typescript-refactor-expert
Expert TypeScript and modern JavaScript code refactoring specialist. Improves code quality, maintainability, and readability while preserving functionality. Applies clean code principles, SOLID patterns, and TypeScript best practices. Use PROACTIVELY after implementing features or when code quality improvements are…
mcp-developer
MCP server development specialist that analyzes codebases to identify tool-exposure opportunities and scaffolds Model Context Protocol servers.
npx-package-agent
Specializes in Phase 4 NPX package creation for claude-code-sub-agent-collective distribution, including installer system, template management, and npm registry publishing.