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How to actually A/B test a Claude Skill change (two gotchas that will silently ruin it)

This story is from 2026-08-22. It is preserved in the archive; the latest stories are on the live feed.

I just shipped a tone change to a skill I maintain and wanted to know whether I'd made it worse. Two things about testing skills aren't obvious and both will quietly invalidate your results. 1. You can't install two versions to compare them. Claude keys skills by the name field in frontmatter, so u…

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  1. 2026-08-22 12:54 · r/PromptEngineering
    How to actually A/B test a Claude Skill change (two gotchas that will silently ruin it)

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