[BUG] .claude-work directory created with trailing space on Windows, causing plugin install failure and data fragmentation

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)
• [ ] I am using the latest version of Claude Code

What's Wrong?

Claude Code creates .claude-work (with a trailing space) as the working directory on Windows. This causes:

1. Plugin install failure — git clone fails because Windows cannot handle trailing spaces in paths:

Error: Failed to install: Failed to clone repository:
fatal: could not create work tree dir 'C:\Users<user>.claude-work \plugins\cache\temp_git_...' : Invalid argument

1. Data fragmentation — Some sessions use .claude-work (no space), others use .claude-work (with space), splitting memory,

history, and session data across two directories.

My Windows username has no spaces (7rong), so this is not the same as #31418.

## Environment

• OS: Windows 11 Pro 10.0.26200
• Shell: Git Bash
• Claude Code version: 2.1.90 (latest)

## Steps to Reproduce

1. Open Claude Code on Windows (Git Bash)
2. Check home directory: both .claude-work and .claude-work (trailing space) exist
3. Run /plugin install superpowers@claude-plugins-official
4. Plugin install fails with "Invalid argument"

## Expected Behavior
Directory should consistently be .claude-work without trailing space.

What Should Happen?

The .claude-work directory should be created without a trailing space. All sessions should use the same directory consistently.

Error Messages/Logs

Error: Failed to install: Failed to clone repository: fatal: could not create work tree dir 'C:\Users\7rong\.claude-work \plugins\cache\temp_git_1775121432068_4b337t': Invalid argument

Steps to Reproduce

1. Open Claude Code on Windows with Git Bash
2. Check home directory: both .claude-work and .claude-work (with trailing space) exist
3. Run /plugin install superpowers@claude-plugins-official
4. 4. Plugin install fails with "Invalid argument" because the path contains a trailing space

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.89

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Two directories exist side by side in the home folder:

• C:\Users\7rong\.claude-work (14MB, from previous sessions, contains memory data)
• C:\Users\7rong\.claude-work (5.3MB, trailing space, from current session)

This causes data fragmentation — memory, history, and sessions are split across two directories. Username 7rong has no spaces, so this is different from #31418.