TDD really is that good.
Would be very interested to see whether it’s not just… regular LLM snowballing a paragraph into 12 pages of “technical design documents” and 10K lines of code. Not sure what kind of niche you’re in or what the business logic is, but it sounds to me like you’ve built a machine that… generates code you don’t need to look at??
Probably wrote 2000+ words of prompts per day to the agent, Monday to Friday, for like 9 months. Dozens to hundreds of prompts a day back and forth with anywhere from 1-7 concurrent agents at a time.
This is not something anyone would ever one-shot. There are thousands of commits. My commit log looks like a normal squash-merge-to-main-and-deploy workflow.