EnterPlanMode Tool

What: A new tool that allows Claude to proactively request permission to enter plan mode for complex tasks requiring careful exploration before implementation.

How to use:

# Claude will automatically suggest entering plan mode for complex tasks
# You'll see a prompt: "Enter plan mode?"
# Press 'y' to approve or 'n' to decline

Details:

• Requires user approval before entering plan mode
• Designed for tasks with multiple valid approaches, architectural decisions, or unclear requirements
• Includes extensive documentation on when to use vs. not use plan mode
• Cannot be used from agent contexts (main conversation only)
• Evidence: Tool definition at GRA variable in _50 at line 425698, prompt at vb2 line 425575