Example Output: TypeScript Review (Next.js)

Typical AI response when using prompts/code-quality/typescript.md on a PR with component and API changes.

components/UserCard.tsx

Line 12 — user is implicitly any because getUser() has no return type. Fix: Define type User = { id: string; name: string; avatar?: string } and type the return as getUser(): Promise<User>.
Line 18 — onClick prop is untyped in the component's props. Fix: Add onClick?: () => void to the props interface.

app/api/users/route.ts

Line 5 — searchParams is used as a generic object; get('q') returns string | null. Fix: Narrow with const q = searchParams.get('q') ?? '' or extract from typed NextRequest.
Line 22 — Response returns any because fetchUsers() is untyped. Fix: Type the return as fetchUsers(): Promise<User[]> and use it in Response.json().

lib/auth.ts

Line 8 — session allows undefined but is used without a guard. Fix: Add if (!session) return null before accessing session properties.

Summary

File	Issues
`UserCard.tsx`	2 (implicit any, untyped props)
`api/users/route.ts`	2 (searchParams, untyped return)
`lib/auth.ts`	1 (nullable session)

Total: 5. Prioritize typing getUser/fetchUsers and the UserCard props.