One thing I'd add from the product side is that the reason we went spec-driven is because we observed (and personally experienced) desire to build FAST but then hit a wall trying to make it better.

The problem stems from nobody sharing a good document of "what this is what the app is supposed to do." The codebase became the only record of intent, and it was written by AI.

Spec-driven development fixes that. You can hand it to a new teammate, read & understand it, and actually understand the system. The agent reads the same document and generates from it. When something needs to change, you change the spec, not a pile of files you didn't write that become messy later.

We're really early and want feedback from people actually building things. If you try it, please share your experience!