[FEATURE] Allow Hooks to control Plan Mode completely

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I want to control everything that happens in my agents and hooks. The current implementation of PlanMode is baked into Claude Code and it ignores all agents and hooks and goes from plan approved to execute plan.

Proposed Solution

I NEED to catch that gap, move the plan from ~/.claude/plans to my-project/docs/work/plans, and I like to start/update my session summary writer here so when the session ends, I have the plan concepts recorded.

It's nice that PlanMode is a discrete sub-process, but it needs to play nicely with hooks and agents.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Developer tools/SDK

Use Case Example

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Additional Context

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