bug

**Describe the bug**

**Versions**
- Copilot for Xcode: [e.g. 0.25.0]
- Xcode: [e.g. 16.0]
- macOS: [e.g. 14.6.1]

**Steps to reproduce**
1.
2.

**Screenshots**

**Logs**

**Additional context**

Start by recording the Copilot for Xcode, Xcode, and macOS versions and adding concrete reproduction steps. Then inspect ~/Library/Logs/GitHubCopilot/ and attach relevant logs. Done means the failing behavior is reproducible and documented with enough context for investigation.

索引モデルが issue の本文から書いたものです。