building-nextjs-apps SKILL.md skillA
building-nextjs-apps from mjunaidca/mjs-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mjunaidca/mjs-agent-skills/building-nextjs-apps@git:20251222.3cc0c3cPins git:20251222.3cc0c3c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mjunaidca/mjs-agent-skills
- Path
.claude/skills/building-nextjs-apps/SKILL.md- Versions recorded
- 2
- Latest version
- git:20251222.3cc0c3c, committed Dec 22, 2025
- First version recorded
- Dec 21, 2025
- Size
- 7,556 bytes
- Repository stars
- 28
- License
- none declared
Build Next.js 16 applications with correct patterns and distinctive design. Use when creating pages, layouts, dynamic routes, upgrading from Next.js 15, or implementing proxy.ts. Covers breaking changes (async params/searchParams, Turbopack, cacheComponents) and frontend aesthetics. NOT when building non-React or backend-only applications.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Next.js 16 Applications
Build Next.js 16 applications correctly with distinctive design.
## Critical Breaking Changes (Next.js 16)
### 1. params and searchParams are Now Promises
**THIS IS THE MOST COMMON MISTAKE.**
```typescript
// WRONG - Next.js 15 pattern (WILL FAIL)
export default function Page({ params }: { params: { id: string } }) {
return <div>ID: {params.id}</div>
}
// CORRECT - Next.js 16 pattern
export default async function Page({
params,
}: {
params: Promise<{ id: string }>
}) {
const { id } = await params
return <div>ID: {id}</div>
}
```
### 2. Client Components Need use() Hook
```typescript
"use client"
import { use } from "react"
export default function ClientPage({
params,
}: {
params: Promise<{ id: string }>
}) {
const { id } = use(params)
return <div>ID: {id}</div>
}
```
### 3. searchParams Also Async
```typescript
export default async function Page({
searchParams,
}: {
searchParams: Promise<{ page?: string }>
}) {
const { page } = await searchParams
return <div>Page: {page ?? "1"}</div>
}
```
---
## Core Patterns
### Project Setup
```bash
npx create-next-app@latest my-app --typescript --tailwind --eslint
cd my-app
…Read the whole file at its exact version.
How to install
mdr add mjunaidca/mjs-agent-skills/building-nextjs-apps@sha256:19b7888c2b05a76eThe line at the top of this page pins the label git:20251222.3cc0c3c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_dentvz7yf4h7aq2f)
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Versions
The registry has recorded 2 versions of this file, between Dec 21, 2025 and Dec 22, 2025, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20251222.3cc0c3c latest | 2025-12-22 | 3cc0c3c | 7,556 B | A | view · diff |
| git:20251221.89be3ce | 2025-12-21 | 89be3ce | 5,553 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7556 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
mjunaidca/mjs-agent-skills · 28 stars · license none declared · pushed 2026-08-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dentvz7yf4h7aq2f GET https://markdownregistry.com/api/v1/resolve?ref=mjunaidca/mjs-agent-skills/building-nextjs-apps GET https://markdownregistry.com/api/v1/blob/19b7888c2b05a76e8abd539f6573c32090a2d6d470eab61034c84c878795db58
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.