It’s been two months and no reply from the Google team tells that THEY DO STORE YOUR INTERACTION AND DATA, and USE FOR TRAINING THERE AI MODELS.
Hence be aware of using any thing private with ANTIGRAVITY. It is better to use AI tools where it is explicitly stated that they won’t be using your private data like chats/prompt/codebase to train there AI models (for example ClaudeCode, VSCopilot etc).