How to Make Claude Test Its Own Work: The Verification Loop
Anthropic's Claude Code team has Claude check its own work before it says it's done. Here is how /verify works, and how to set it up once.
You ask Claude for a feature, it says it's finished, you try it and it's broken. Anthropic's Claude Code team has a name for the fix: a verification loop. Claude checks its own work, fixes what fails and checks again, before it tells you it's done. Here is how it works, and how to set it up once so it runs the same way every time.
Read Anthropic's post, Building verification loops in Claude Code with skills: https://claude.com/blog/building-verification-loops-in-claude-code-with-skills
Who is behind it
The post is by Delba de Oliveira, a member of the Claude Code team, published on July 22, 2026. Boris Cherny, who created Claude Code, works on the same team. They describe the pattern they use every day: /code-review hunts for bugs, /simplify cleans up the diff, /verify confirms the change actually works, and a custom /design skill checks the UI against their guidelines.
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