Devang-09/codestream — reverse-engineered prompt

Build me CodeStream Live, a VS Code extension with a simple mobile web viewer that lets me see the code I’m working on from my phone.

I want to set a private sync ID from the VS Code command palette, then whenever I save a file, the current code should be sent to Firebase Firestore under that ID. On my phone I should be able to open a viewer URL with that same ID and instantly see the latest saved code. Make the viewer clean and readable, with syntax highlighting, the file name or language if available, and a copy button so I can copy the code from my phone.

Keep it simple and working end to end. Use TypeScript for the VS Code extension, plain HTML CSS JavaScript for the viewer, Firebase for realtime storage, and Prism for highlighting. Include sensible setup notes so I can configure Firebase and test it locally or deploy it.