nextjs

A guide to Next.js App Router development, covering server-rendered components, data loading, caching, routing, middleware, metadata, errors, streaming, and server-side actions.

In plain words
What is it for?
It is for building, reviewing, and optimizing applications with Next.js 14–16+ and its App Router.
Why use it?
It helps developers choose suitable Next.js patterns and avoid common mistakes in application structure and performance.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/wpank/ai/nextjs
Any agent
npx skills add wpank/ai --skill nextjs
Clone the repo
git clone --depth 1 https://github.com/wpank/ai

Made for: Claude Code, Codex.

Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,583 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00043 $0.03583
Opus 5 $0.00022 $0.01792
Sonnet 5 $0.00009 $0.00717
Haiku 4.5 $0.00004 $0.00358

Measured 2d ago against content hash 34de4ac6e19a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

nextjs scanned grade A 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 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

| No cache | `fetch(url, { cache: 'no-store' })` | Always-fresh data |
skills/frontend/nextjs/SKILL.md · 381 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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.

  1. 2d ago First seen · 381 lines · 43 tokens per session scan A 34de4ac6e19a

Subscribe to this mod's changes

nextjs is a skill published in the GitHub repository wpank/ai (11 stars, last pushed 6mo ago), with no licence file. It adds 43 tokens to every session and 3,583 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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