We tested giving Claude Code a 450-line static prompt vs a self-learning harness (and measured a 38.4% drop in regression errors)
Like a lot of people here, my team started out treating `CLAUDE.md` like a junk drawer. Every time Claude Code made an architectural mistake, failed to run our custom test runner, or imported a deprecated utility, we added another bullet point to root instructions. By month two, our instruction fil…
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- 2026-09-23 09:33 · r/PromptEngineering
We tested giving Claude Code a 450-line static prompt vs a self-learning harness (and measured a 38.4% drop in regression errors)