[BUG] Bell/beep sounds every second during processing despite bell: false

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Descripción:

Claude Code emits terminal bell characters (~1 per second) while processing, even with these settings:

{
"notifications": "disabled",
"terminal_progress_bar": false,
"bell": false
}

Environment:

• Claude Code version: 2.1.6
• OS: Linux (Ubuntu/Debian)
• Terminal: xterm via PuTTY SSH
• Model: Opus 4.5

Steps to reproduce:

1. Connect via SSH with PuTTY (bell enabled)
2. Run any prompt in Claude Code
3. Hear beep every second during processing

Expected: No bell sounds when bell: false
Actual: Continuous beeping during processing

What Should Happen?

No terminal bell/beep sounds should be emitted when bell: false is configured.

Error Messages/Logs

N/A - No error messages, only unwanted bell/beep sounds during processing.

Steps to Reproduce

● 1. Configure settings.json with: "bell": false, "notifications": "disabled"

1. Connect to server via SSH using PuTTY (with terminal bell enabled)
2. Start Claude Code: claude
3. Send any prompt and wait for processing
4. Observe: terminal bell sounds approximately every second while Claude processes the request

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.6

Claude Code Version

2.1.6

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_