[BUG] MAX_THINKING_TOKENS not works on Claude Code for VS Code

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?

MAX_THINKING_TOKENS not works on Claude Code for VS Code

What Should Happen?

MAX_THINKING_TOKENS works on Claude Code for VS Code

Error Messages/Logs

Steps to Reproduce

1. open Claude Code for VS Code
2. see vscode output claude.exe --output-format stream-json --verbose --input-format stream-json --max-thinking-tokens 31999 --model default --permission-prompt-tool stdio

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.62

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_