Built-in TypeScript Watch Script (ts:watch) for Better DX

[abhishekmardiya]

Goals

1. Provide out-of-the-box TypeScript watch support
2. Remove need for manual script setup
3. Improve real-time type checking during development

Non-Goals

No response

Background

Next.js has great TypeScript support, but it does not include a built-in watch mode for continuous type checking.

Currently, developers manually add:

"ts:watch": "tsc --noEmit --watch"

Proposal

Next.js could automatically include the following script in package.json when TypeScript is detected:

"ts:watch": "tsc --noEmit --watch"

This allows developers to simply run:

npm run ts:watch

This keeps the solution simple, aligns with existing workflows, and improves developer experience without introducing new commands.