Plan Mode Over-Prompting to Implement

Priority: P1 Issue: #6143

An experimental plan mode prompt exists (Flag.KILO_EXPERIMENTAL_PLAN_MODE) that is verbose. Agent still tends to ask "Should I implement this?" repeatedly.

Remaining Work

• Review the Plan mode system prompt for language that encourages the agent to switch to implementation
• The prompt should make clear that in Plan mode, the agent's job is to help create and refine a plan — not implement
• "Should I implement this?" should be asked at most once, after the plan appears settled
• Coordinate with team on correct Plan mode behavior before changing the prompt