Feature request: play notification sound on permission prompts (tool approval)

Problem

When Claude Code needs approval for a tool use (file edit, bash command, etc.), there is no audio notification. The user has to keep watching the terminal to notice when approval is needed.

The completion sound works great — but permission prompts are silent. If I switch to another window while Claude is working, I miss the approval prompt and the session stalls until I notice.

Requested behavior

Play the same notification sound (terminal bell or configured sound) when:

• A tool use needs approval (edit, write, bash, etc.)
• Any interactive prompt appears that requires user input

This way the user gets audio feedback for both "I'm done" and "I need your input" moments.

Current workaround

None — must watch the terminal constantly.

Environment

• Claude Code CLI on WSL2 (Windows)
• Also relevant for macOS/Linux terminal users