I built a VS Code extension to switch between AI models mid-conversation, here's how

So I'm a CS student and I've been bouncing between GPT-5.4 and Claude for different stuff. GPT for docs and boilerplate, Claude when I need code that actually compiles on the first try. For a while I just had browser tabs open side by side and kept copy-pasting code back and forth like an animal. Cursor looked interesting but $20/month is a lot when you're living on instant noodles.