Behavior-Preserving Refactor in Small Steps
This is a ready-made prompt from the Zayenha Prompt library in Programming & Tech, written for claude-sonnet-4-7. It has a main prompt to copy into the model, built-in quality guards, and a verification prompt to run in a second window to review the answer. The full text needs the Plus plan; the description is open to all.
Refactor tangled code into clean units through small behavior-preserving steps, with a safety-net test and complete final code free of any TODO or omission.
Your current plan: free
Breaking down a giant inherited function, removing accumulated duplication before adding a feature, reducing conditional complexity in a hard-to-change module.
Built-in quality guards
Never invent APIs, functions, or libraries
No TODOs or stubs — output runs as-is
Strict adherence to the requested structure
OWASP Top 10 considered in code
Frequently asked questions
How do I use this prompt?
Copy the main prompt and paste it into claude-sonnet-4-7 or the model you use, replace what is in square brackets with your details, then run the verification prompt in a second window with the answer pasted in, and review it before relying on it.
Is this prompt free?
Its full text requires the Plus plan or higher. Free prompts you can copy at once without an account are on the ready-made Arabic prompts page.
Which model was this prompt written for?
It was written for claude-sonnet-4-7 and follows how that model works; you can run it on other models too, reviewing the result, since no single wording guarantees the best result on every model.