[BUG] Claude Code inserts space after 'F' in Turkish camelCase identifiers

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?

When creating Turkish camelCase function names containing the letter 'F' followed by lowercase 'a', Claude Code automatically inserts a space, breaking the code syntax.

What Should Happen?

• Function name should be: createDuzelticiF aaliyet (no space)

Error Messages/Logs

Steps to Reproduce

1. Ask Claude Code to create a function named "createDuzelticiF aaliyet" (should be "createDuzelticiF aaliyet")
2. Claude will write: "createDuzelticiF aaliyet" with a space after 'F'
3. This happens consistently regardless of manual correction attempts

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.24

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

iTerm2

Additional Information

Impact:

• JavaScript/TypeScript syntax errors
• Code won't compile/run
• Requires manual sed commands to fix

Workaround:

• Use English function names instead (createCorrectiveAction)
• Or manually fix with sed: sed -i 's/F aaliyet/F aaliyet/g' file.js