Validate

This is a one-liner convenience command that chains together your project's health checks: typechecking, linting, formatting, tests, and optionally building. It's the kind of thing you run before pushing to CI or after pulling down changes to make sure nothing's broken. The real value is standardization. Instead of remembering which projects use `npm run check` versus `yarn validate` versus whatever custom script, you get a consistent command across codebases. It reports failures with full error output, so you're not left guessing which step blew up. Honestly, it's basic automation, but that's exactly why it works.