What is plan mode in Claude Code, and when should I use it?

In Claude Code, Plan Mode is an interactive feature that prompts the agent to outline its proposed strategy before it begins executing any changes to your codebase.

When you trigger Plan Mode, the agent stops to present a summary of the steps it intends to take to solve your request. It waits for your explicit approval or feedback before it starts running commands, editing files, or modifying your environment.

When should you use it?

You should use Plan Mode whenever you want to maintain tight control over the development process or when the task carries higher stakes. Specifically, it is ideal for:

• Complex Tasks: When a request involves multiple files, refactoring across different modules, or significant structural changes, Plan Mode helps you ensure the agent understands the scope before it starts.
• Preventing Side Effects: If you are worried about the agent making unintended changes, Plan Mode allows you to audit the plan for potential risks.
• Course Correction: If you notice the agent’s proposed approach doesn't align with your project’s architectural style or specific requirements, you can redirect it early, saving time and avoiding "undo" operations.
• Learning/Verification: If you are unsure how the agent plans to solve a problem, seeing the plan can help you learn how it is navigating your code or confirm that its logic is sound.

In short: use Plan Mode when you want to act as a supervisor rather than just an observer. If the task is simple or routine, you might skip it to move faster; if the task is sensitive or multi-stepped, Plan Mode is a safety net.