[Antigravity 2.0 Desktop] @ file mention autocomplete fails across multiple folders in multi-root projects

Google Antigravity
1

Environment

  • Application: Google Antigravity 2.0 (Desktop, version 2.11.0, Windows 11)

  • Feature: Agent Chat UI / @ File Mention Autocomplete

Summary

In Antigravity 2.0 Desktop, the @ file mention autocompletion service does not maintain a unified index in multi-folder workspaces. When working with multiple open folders, the @ suggestion popup only indexes one root folder at a time (typically the most recently added), making all files in the other project folders completely invisible to the @ picker.

Steps to Reproduce

  1. In Antigravity 2.0 Desktop, open a project containing at least two root folders (e.g., Folder-A and Folder-B).

  2. In the chat prompt, type @ followed by the filename of a document located inside Folder-A.

Observed Behavior

  • The @ suggestion popup displays “No results” for any file located in Folder-A.

  • Only files from Folder-B are surfaced in the autocomplete list.

Expected Behavior

The @ mention search service should aggregate and index all root directories declared in the multi-folder project so that any file can be referenced regardless of which folder it resides in.

Question

Is this intended behavior, a bug, or a misconfiguration on my side?