antfu-collective/vite-plugin-inspect — reverse-engineered prompt

Build me a Vite plugin that lets developers inspect what happens to files as they pass through other Vite plugins. I want it to be useful when debugging a Vite app or when writing a plugin, so it should show the intermediate transformed code for modules and make it easy to see which plugin changed what.

It should plug into a normal Vite config with a simple Inspect call, and it should work through Vite DevTools during development. Also support a build mode where, after running the production build, it outputs a small inspector app into a folder like .vite-inspect that can be served locally to review the build transforms.

Please keep the setup simple, TypeScript based, and include a small playground or example Vite project so I can test it quickly. Add basic tests where they make sense, and make sure the README explains installation, config for dev mode, and config for build mode.