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YesTool not named · 15 Nov 2025

I get 20x ROI on well defined, comprehensive, end to end acceptance tests that the AI can run

canterburry on Hacker News

20x ROI

In the thread “Spec-Driven Development: The Waterfall Strikes Back”

Helped: Writing specs with acceptance criteria for AI to run tests.

… People defer thinking about what correct and incorrect actually looks like for a whole wide scope of scenarios and instead choose to discover through trial and error. I get 20x ROI on well defined, comprehensive, end to end acceptance tests that the AI can run. They fix everything from big picture functionality to minor logic errors.