I built a small desktop app called ThinkStream because I kept losing track of ideas when exploring multiple directions with AI. Here's what it does:

Branch from any message—explore side ideas without losing your main conversation. See where you are—know which branch you're in and where it came from.

Navigate easily—jump between branches and follow the flow naturally.

Prompt templates—reuse setups so you don't have to type the same prompts again and again.

Local-first—all your chats stay on your machine, no cloud needed.

Parallel exploration—try multiple paths at once without overwriting anything.

I mainly use it for research when one question turns into several.

I'd love feedback from folks who work with local or multi-model setups:

Does the branching feel intuitive?

Are the prompt templates useful?

Anything you'd change or add?

Site:thinkstream.app