How I Built a Regression Suite for My AI Coding Agent's Prompts: 5 Lessons
This story is from 2026-09-26. It is preserved in the archive; the latest stories are on the live feed.
TL;DR I changed one line in my coding agent's spec file and, two weeks later, it quietly started skipping tests on every PR. Nobody noticed because nothing "broke." So I built a regression suite for the prompts themselves: frozen repo snapshots, canned tasks, deterministic graders, and an LLM judge…
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- 2026-09-26 14:32 · DEV Community — AI
How I Built a Regression Suite for My AI Coding Agent's Prompts: 5 Lessons