[FEATURE] Add 'implement using subagents' option after plan generation

Problem

After generating a plan in plan mode, users have three options: "Yes, and bypass permissions", "Yes, and manually accept edits", or "No, keep planning". There's no option to leverage subagents for parallel or sequential implementation of the plan steps, which would be more efficient for complex multi-step plans.

<img width="450" src="https://github.com/user-attachments/assets/556a418b-53ee-416a-98b7-0acb93c20760" />

Proposed solution

Add a fourth option: "Yes, and implement using subagents":

When selected, Claude would:

1. Run in "approve edits" mode (implicitly)
2. Analyze the generated plan to identify independent vs. dependent steps
3. Act as an orchestrator rather than direct implementer
4. Delegate plan steps to specialized subagents:

• Run independent steps in parallel for efficiency
• Run dependent steps sequentially as needed

1. Coordinate and aggregate results from subagents

This would turn Claude into a "project manager" mode where it focuses on orchestration rather than direct implementation, potentially speeding up complex implementations significantly.

Priority

Medium

Category

Interactive mode (TUI)