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typescript-react-nextjs-patterns SKILL.md skillA

typescript-react-nextjs-patterns from leejpsd/typescript-react-nextjs-patterns is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add leejpsd/typescript-react-nextjs-patterns/typescript-react-nextjs-patterns@git:20260914.33ae2e4

Pins git:20260914.33ae2e4 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
leejpsd/typescript-react-nextjs-patterns
Path
SKILL.md
Versions recorded
5
Latest version
git:20260914.33ae2e4, committed Sep 14, 2026
First version recorded
Jul 22, 2026
Size
10,737 bytes
Repository stars
22
License
MIT

Production-grade TypeScript reference for React & Next.js frontend development. Covers type narrowing, component Props, generic hooks, discriminated unions, as const, satisfies, Zod validation, TanStack Query, server/client boundaries, forms, state management, performance, accessibility, debugging, and code review. Use when the user works with TypeScript in React or Next.js: type errors, Props design, generics, API typing, SSR/CSR boundaries, hydration issues, form validation, state…

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

# TypeScript for React & Next.js — Agent Skill

A structured reference for AI coding agents assisting frontend engineers with TypeScript, React, and Next.js in production environments.

---

## Agent Behavior Rules

### Before answering, always verify:

1. **Server or client?** Server Components, Server Actions, and Route Handlers have different type constraints than `"use client"` components.
2. **Runtime validation needed?** Static types do NOT validate API responses, URL params, form data, or localStorage. Data crossing a trust boundary requires Zod or equivalent.
3. **App Router or Pages Router?** Patterns differ significantly. If unclear, ask.
4. **TypeScript version?** `satisfies` needs 5.0+, `NoInfer` 5.4+, inferred type predicates 5.5+. TS 6.0 is the final JS-based compiler; TS 7 is the Go-native rewrite — ~10x faster, same language, but tooling that consumes the old compiler API may lag.
5. **Next.js version?** `params` is a `Promise` in 15+. Caching model changed in 16+ (`"use cache"`), and 16 renames `middleware.ts` → `proxy.ts` (Node runtime).
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add leejpsd/typescript-react-nextjs-patterns/typescript-react-nextjs-patterns@sha256:56a3b2e0cb1df68b

The line at the top of this page pins the label git:20260914.33ae2e4, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_ef6a5socxhn7i5nt.svg)](https://markdownregistry.com/a/art_ef6a5socxhn7i5nt)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Jul 22, 2026 and Sep 14, 2026, about one every 14 days.

versioncommittedcommitsizeaudit
git:20260914.33ae2e4 latest2026-09-14 33ae2e4 10,737 BA view · diff
git:20260722.301eacd2026-07-22 301eacd 10,329 BA view · diff
git:20260722.49388132026-07-22 4938813 10,518 BA view · diff
git:20260722.db99b0e2026-07-22 db99b0e 10,362 BA view · diff
git:20260722.e0bc6db2026-07-22 e0bc6db 10,511 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (10737 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

GitHub

leejpsd/typescript-react-nextjs-patterns · 22 stars · license MIT · pushed 2026-09-14 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ef6a5socxhn7i5nt
GET https://markdownregistry.com/api/v1/resolve?ref=leejpsd/typescript-react-nextjs-patterns/typescript-react-nextjs-patterns
GET https://markdownregistry.com/api/v1/blob/56a3b2e0cb1df68b4a8dd15d551781db9f44fd09b72cc852e8075c577ccfa607

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.

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