Add configurable audible alert for pending permission approvals in Codex CLI

What variant of Codex are you using?

CLI

What feature would you like to see?

I’d like to request an improvement for Codex CLI: play a configurable audible alert whenever the agent requests a permission approval (similar to Copilot CLI).

Why this helps
During long-running tasks, I’m not always watching the terminal. Approval prompts can be missed, which adds unnecessary delay.

Proposed behavior

• Add a config option: approval_sound (on/off)
• Optionally allow:
• choosing sound type/volume
• using system notification sound
• repeating alert every X seconds while approval is pending

Expected outcome
Faster response to approval prompts and smoother human-in-the-loop workflows.

Additional information

_No response_