[BUG] Listing git tree files and other hidden files

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.71 (Claude Code)
• Operating System: macOS
• Terminal: iTerm2

Bug Description

Referencing files with @... includes all hidden files, and even git tree files.

Steps to Reproduce

1. Open Claude Code in a git repo.
2. Type in @.git/
3. Observe git tree contents being suggested

Expected Behavior

Ignore files like it did before.

Actual Behavior

Files are not ignored.

Additional Context

<img width="758" height="478" alt="Image" src="https://github.com/user-attachments/assets/6092f4b8-191d-4ba2-a869-88ae0e0b9d19" />

This issue claims that contents of .gitignore are observed: https://github.com/anthropics/claude-code/issues/166#issuecomment-2691489811