Plan mode no longer suggests context clear before executing plan

Description

Plan mode previously offered an option to clear context before executing an approved plan. This behavior has stopped occurring.

Expected behavior

When a plan is approved via ExitPlanMode, the user should be presented with an option to clear context before execution begins. This is important because:

• Planning conversations consume significant context window (exploration agents, design discussion, iterative plan edits)
• Implementation needs the freed context headroom, especially for multi-file plans
• The user should not have to manually remember the plan file path after clearing -- the system should handle the plan file reference seamlessly

Current behavior

ExitPlanMode approves the plan and immediately begins execution without offering to clear context. The user must manually run /clear and then remember/re-reference the plan file path.

Impact

• Context pressure during implementation of complex plans
• Manual workaround required (user runs /clear then re-prompts with plan path)
• Regression from prior behavior that users relied on

Environment

• Claude Code CLI on Windows 11
• Model: claude-sonnet-4-6 / claude-opus-4-6
• Observed: 2026-03-26