[Bug] Opus 4.8 responses not displayed after tool use — quota consumed with no output

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?

After any tool call (Read/Edit/image), the assistant response is silently swallowed — no text is shown, but quota is consumed. Switching to Sonnet 4.6 resolves it immediately.

What Should Happen?

Text response should appear after tool use, as it does on Sonnet 4.6.

Error Messages/Logs

Steps to Reproduce

1. Set model to claude-opus-4-8 via /model command. 2. Send a prompt that triggers a tool call (e.g., read a file or image). 3. Observe: no text response is displayed after the tool result. Quota is consumed.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.158 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

Occurs in VS Code extension with WSL2. Sonnet 4.6 works fine in same environment.