API Design — Advanced Patterns

This skill extends api-design with implementation patterns and anti-patterns. Load api-design first.

When to Activate

• Implementing API handlers in TypeScript (Next.js) or Go
• Reviewing code for common API anti-patterns
• Applying the full pre-ship checklist to a new endpoint

Implementation Patterns

TypeScript (Next.js API Route)

import { z } from "zod";
import { NextRequest, NextResponse } from "next/server";