What is nextjs-expert?

A coding guide for Next.js applications using the App Router, a Next.js system for organizing pages and server-side features. It covers API routes, middleware, server components, and Vercel deployment patterns.

Use it to build API routes, add middleware, design server components, and prepare a Next.js application for Vercel.

It helps you choose the right Next.js structure for requests, shared processing, server-rendered parts, and deployment.

How askjohngeorge/askjg-claude-agents configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to askjohngeorge/askjg-claude-agents. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/askjohngeorge/askjg-claude-agents/main/.claude/agents/nextjs-expert.md

Clone the repo

git clone --depth 1 https://github.com/askjohngeorge/askjg-claude-agents

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/askjohngeorge/askjg-claude-agents/nextjs-expert/github.svg)](https://agentmods.dev/agents/askjohngeorge/askjg-claude-agents/nextjs-expert)

Your own site

<a href="https://agentmods.dev/agents/askjohngeorge/askjg-claude-agents/nextjs-expert"><img src="https://agentmods.dev/badge/agents/askjohngeorge/askjg-claude-agents/nextjs-expert/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/askjohngeorge/askjg-claude-agents/nextjs-expert"><img src="https://agentmods.dev/badge/agents/askjohngeorge/askjg-claude-agents/nextjs-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 25 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,806 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

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	$0.00025	$0.01806
Opus 5.5	$0.00010	$0.00722
Sonnet 5.5	$0.00005	$0.00361
Haiku 4.5	$0.00003	$0.00181

Measured 2mo ago against content hash 935e71fd839a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nextjs-expert 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 2mo 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.

.claude/agents/nextjs-expert.md · 219 lines

The source is not reproduced here

No licence file

Read it on GitHub

Changes

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.

2mo ago First seen · 219 lines · 25 tokens per session scan A 935e71fd839a

Subscribe to this mod's changes

nextjs-expert is an agent published in the GitHub repository askjohngeorge/askjg-claude-agents (55 stars, last pushed 9mo ago), with no licence file. It adds 25 tokens to every session and 1,806 once invoked, about $0.0001 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.

Backend and APIs Frontend

nextjs-expert next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
nextjs-expertaskjohngeorge/askjg-claude-agents	Agent	55	9mo ago	none	A	25	Claude Code
php-developerdavepoon/buildwithclaude	Agent	3.7k	yesterday	MIT	A	51	Claude Code
backend-reviewerjeremylongshore/tons-of-skills-marketplace	Agent	2.9k	yesterday	MIT	A	36	Claude Code
integrations-engineeravelikiy/great_cto	Agent	112	2d ago	MIT	A	106	Claude Code
gatetonone-ai/tonone	Agent	77	23d ago	MIT	A	19	Claude Code
broadcasting-agentSofttor/nestjs-hexagonal	Agent	5	29d ago	MIT	A	58	Claude Code
dotnet-architecture-reviewerStefanTheCode/dotnet-ai-toolkit	Agent	26	2mo ago	MIT	A	102	Claude Code

askjg-claude-agents: Agent for Claude Code