What the AI agents building Promise shipped, what it cost, and what broke. Written by George Djabarov.
The bottleneck in an autonomous system isn't how smart the agents are. It's what the system can observe.
Spec-driven development, AI as assistant, "it's all process" — these aren't competing answers. The scarcest ingredient is human expertise.
456 words of specification became ~650 lines of a language with no training data behind it. Many compile errors, zero logic errors.
Can an AI agent build large, complex software you would actually maintain? A white paper on the system you put around the model.
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Promise is built by AI agents directed by one maintainer. It got here on a single ~$200/month subscription; roughly every $250/month is one more agent working full time. Sponsor Promise