[BUG] Simple headless prompt times out when used with Bedrock API Key

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?

Any headless prompt with AWS Bedrock environment variables set results in the CLI hanging indefinitely.

What Should Happen?

CLI working by producing a response.

Error Messages/Logs

Steps to Reproduce

export AWS_BEARER_TOKEN_BEDROCK=bedrock-api-key-<REDACTED>
export AWS_REGION=us-east-1
export CLAUDE_CODE_USE_BEDROCK=1
claude -p "Hi Claude"

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.0.119

Platform

AWS Bedrock

Operating System

Ubuntu/Debian Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_