stagewise

Most coding agents are blind — they can read your code but they're too dumb to actually see what's happening on screen. Stagewise fixes that by running its own browser environment where it can see the DOM, read console output, inspect live app state, and edit the code while it's looking right at the thing. The open-source setup with bring-your-own-API-key flexibility means zero vendor lock-in, which is basically unheard of in AI coding tools. YC-backed with nearly 300 followers in its first week — that's the kind of signal you can't fake.