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Build a behavior-preserving refactoring prompt

Create a prompt for a behavior-preserving refactor plan from current contracts, maintainability problems, and boundaries, with characterization checks.

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About this prompt

A refactor needs a clear account of the behavior it must preserve. Describe externally visible results, error handling, and meaningful side effects, alongside the maintainability problem that motivates the work.

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Any AI app. Paste the prompt into ChatGPT, Claude, Gemini, Copilot or whatever your team already uses.