`@` autocomplete does not detect newly created files until OpenCode is restarted

Description

Steps to reproduce:

1. Launch OpenCode.
2. Keep the session running.
3. Create a new file.
   • This happens whether:
     • the AI agent creates it, or
     • I manually create it in VS Code Explorer.
4. Type @ followed by the new filename.
5. The file is not suggested.
6. Press Ctrl+C to exit OpenCode.
7. Start OpenCode again.
8. Type @ again.
9. The newly created file is immediately suggested.

Expected Behaviour:
The @ autocomplete should stay synchronized with the project and immediately suggest newly created files without requiring a restart.

Actual Behaviour:
The @ autocomplete appears to use a stale file index.

The filesystem itself is updated correctly, and the file exists on disk, but the autocomplete does not refresh until OpenCode is restarted.

Additional Observations:

• Happens for both manually created files and AI-created files.
• Existing files are suggested normally.
• Restarting OpenCode always fixes the problem temporarily.
• This is reproducible every time.

Plugins

No response

OpenCode version

1.18.4

Steps to reproduce

1. Launch OpenCode.
2. Keep the session running.
3. Create a new file.
   • This happens whether:
     • the AI agent creates it, or
     • I manually create it in VS Code Explorer.
4. Type @ followed by the new filename.
5. The file is not suggested.
6. Press Ctrl+C to exit OpenCode.
7. Start OpenCode again.
8. Type @ again.
9. The newly created file is immediately suggested.

Screenshot and/or share link

No response

Operating System

Windows 11

Terminal

VS Code Integrated Terminal