Claude Code's Plan Mode Lets Developers Review AI Strategy Before Any Files Change

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Claude Code's plan mode is a permission setting that separates the planning phase from code execution, requiring the AI to propose a full implementation strategy before making any edits. Developers activate it via a command-line flag or a keyboard shortcut, and the AI then inspects the codebase and outlines which files it intends to change, in what order, and under what assumptions. The mode is particularly valuable for tasks spanning multiple files or touching sensitive areas like authentication, migrations, or billing, where a flawed approach can be costly to unwind. Users are advised to scrutinize the plan for correct file identification, use of existing patterns, safe sequencing, and verifiable test criteria before approving execution. Vague plans that lack specific file names and sequences should be corrected before the AI is allowed to proceed, as auto-accepting without a solid plan only accelerates the creation of problematic code.

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