[BUG] Claude Code accepts prompt but produces no output, subsequent messages disappear

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?

Bug: Claude Code accepts prompt but produces no output, subsequent messages disappear

Environment:

• OS: macOS (Apple Silicon / Intel — fill in which one)
• Claude Code version: run claude --version and paste here
• Interface: Claude Desktop (not VS Code)

Description:
When I submit a prompt to Claude Code, it accepts the initial message but produces no visible output — no progress indicator, no response, nothing. All subsequent messages I type also disappear without any acknowledgment or response. The session appears active but is effectively dead.

Steps to reproduce:

1. Open Claude Code
2. Submit any prompt (e.g., asking it to edit an HTML file in the working directory)
3. Claude Code accepts the prompt — no error shown
4. No output, progress, or response appears
5. Typing additional messages results in them disappearing entirely

Expected behavior:
Claude Code should show progress (thinking indicator, tool calls, etc.) and eventually return a response.

Actual behavior:
No output at all. Messages vanish. The session becomes unresponsive without any error message.

What I've tried:

• Restarting the app entirely (quit and reopen)
• Checking for updates / running latest version
• Checking status.claude.com for outages
• Multiple different prompts — same result every time

Additional context:
This appears similar to issues reported in:

• https://github.com/anthropics/claude-code/issues/36422
• https://github.com/anthropics/claude-code/issues/17097

What Should Happen?

Expected behavior:
Claude Code should show progress (thinking indicator, tool calls, etc.) and eventually return a response.

Error Messages/Logs

Actual behavior:
No output at all. Messages vanish. The session becomes unresponsive without any error message.

Steps to Reproduce

Steps to reproduce:

Open Claude Code
Submit any prompt (e.g., asking it to edit an HTML file in the working directory)
Claude Code accepts the prompt — no error shown
No output, progress, or response appears
Typing additional messages results in them disappearing entirely

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.1.9493 (b58a0b)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_