[FEATURE] Feature request: hook event for tool permission prompts

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

When using a Stop hook to play a notification sound, the sound doesn't play when Claude is waiting for tool permission approval
(pressing 1/2/3/4). This is because Stop only fires after the full response completes, not when mid-turn tool approvals are needed.

Proposed Solution

Request: Add a new hook event (e.g., ToolPermissionPrompt) that fires when Claude is waiting for the user to approve/deny a tool call.
This would allow notification sounds to play consistently whenever user input is needed.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_