File search tools default to wrong directory when using git worktree

Description

When using Claude Code with a git worktree, the working directory is correctly set to the worktree path (e.g., .claude/worktrees/branch-name), but file search tools (Glob, Grep, Read) default to searching the main repository directory instead of the worktree directory.

Steps to Reproduce

1. Create a git worktree: git worktree add .claude/worktrees/feature-branch
2. Set the working directory to the worktree in Claude Code settings
3. Use Glob or Grep to search for a file - it searches the main repo, not the worktree
4. Edit a file using Read/Edit - it modifies the main repo file, not the worktree

Expected Behavior

File search tools should respect the worktree working directory setting.

Environment

• Claude Code version: Latest
• OS: macOS
• Shell: zsh

Workaround

Must use absolute paths to worktree files to avoid modifying the main repository.