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Next.js App Router (Next.js 16+) · giuseppe-trisciuoglio | DecimalAI

frontendby giuseppe-trisciuoglio

Next.js App Router (Next.js 16+)

giuseppe-trisciuoglio/nextjs-app-router

Source giuseppe-trisciuoglio/developer-kit ↗License MIT

Provides patterns and code examples for building Next.js 16+ applications with App Router architecture.

SkillScore100Maintained

Automatic

Frontend / UI pack

Last verified 8/21/2026

What it changes

Passed 22 of 22 test cases with the skill, and 20 of 22 without it.

Without skill91%

With skill100%

Checks it passed that the model alone missed

includes --turbopack flag in command
uses environment variables for external API endpoint URLs

2 fixed20 passed either way0 still failing0 broke

Pass-rate lift: +9 pp
Tokens: +176%
Agent turns: 0%
Response time: -16%

Model gemini-3.6-flashMeasured 8/21/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/giuseppe-trisciuoglio-nextjs-app-router/SKILL.md https://app.decimal.ai/s/giuseppe-trisciuoglio-nextjs-app-router/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add giuseppe-trisciuoglio-nextjs-app-router, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/giuseppe-trisciuoglio-nextjs-app-router/ and pins it in .decimal/skills.lock

decimalai skills add giuseppe-trisciuoglio-nextjs-app-router

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/giuseppe-trisciuoglio-nextjs-app-router/SKILL.md https://app.decimal.ai/s/giuseppe-trisciuoglio-nextjs-app-router/SKILL.md

Raw file: /s/giuseppe-trisciuoglio-nextjs-app-router/SKILL.md ↗ · machine-readable summary at /s/giuseppe-trisciuoglio-nextjs-app-router.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 2

Prompt

What exact `npx create-next-app` CLI flags setup a modern Next.js project with TypeScript, Tailwind CSS, App Router, and Turbopack enabled by default?

What was checked, without and with the skill
Checked	Without skill	With skill
includes --app flag in command	Passed	Passed
includes --turbopack flag in command	Missed	Passed

case-12 · gemini-3.6-flash · 8/21/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md372 lines11 files

Next.js App Router (Next.js 16+)

Build modern React applications using Next.js 16+ with App Router architecture.

Overview

This skill provides patterns for Server Components (default) and Client Components ("use client"), Server Actions for mutations and form handling, Route Handlers for API endpoints, explicit caching with "use cache" directive, parallel and intercepting routes, and Next.js 16 async APIs and proxy.ts.

When to Use

Activate when user requests involve:

"Create a Next.js 16 project", "Set up App Router"
"Server Component", "Client Component", "use client"
"Server Action", "form submission", "mutation"
"Route Handler", "API endpoint", "route.ts"
"use cache", "cacheLife", "cacheTag", "revalidation"
"parallel routes", "@slot", "intercepting routes"
"proxy.ts", "migrate from middleware.ts"
"layout.tsx", "page.tsx", "loading.tsx", "error.tsx", "not-found.tsx"
"generateMetadata", "next/image", "next/font"

Quick Reference

File	Purpose	Directive	Purpose
`page.tsx`	Route page	`"use server"`	Server Action function
`layout.tsx`	Shared layout	`"use client"`	Client Component boundary
`loading.tsx`	Suspense loading	`"use cache"`	Explicit caching (Next.js 16)
`error.tsx`	Error boundary
`not-found.tsx`	404 page
`route.ts`	API Route Handler
`proxy.ts`	Routing boundary

Instructions

Create New Project

npx create-next-app@latest my-app --typescript --tailwind --app --turbopack

Track record

Benchmark

22 / 22

test cases passed, vs 20 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

giuseppe-trisciuoglio / developer-kit

plugins/developer-kit-typescript/skills/nextjs-app-router/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 10 files

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See it in action

What's inside

Next.js App Router (Next.js 16+)

Overview

When to Use

Quick Reference

Instructions

Create New Project

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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