[BUG] Haiku hallucinates username

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?

Each time Claude uses the "Explore" subagent that uses Haiku OR I use the Haiku explicitly, it gets the path wrong. Not event the project path, but my home path, which is crazy.

✅ /Users/bartlomiejczyz/...
❌ /Users/bartlomiejczyk/...

I've tried updating the CLAUDE.mds, explicitly prompting the right username, forcing to use the pwd first, but nothing works and the model tries to perform actions on non-existing files.

What Should Happen?

Haiku should run commands in the current directory and if a full path must be provided, it should not guess it.

Error Messages/Logs

Steps to Reproduce

1. let your MacOS user be called bartlomiejczyz
2. use haiku and prompt anything related to files
3. no profit

Claude Model

Other

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.53 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Warp

Additional Information

It happens in Warp, but also in any other terminal.