[jasonpatel]

Summary

This PR adds a native agent usage collector for Google Antigravity (Gemini CLI) to Omarchy.

Changes

1. Collector Script (bin/omarchy-agent-usage-antigravity):
   • Parses local prompt counts, active days, and 7-day activity cadence from ~/.gemini/antigravity-cli/history.jsonl.
   • Tracks session counts from conversation metadata.
   • Extracts live quota windows (Weekly 7d and Session 5h reset windows) from the agent status cache.
   • Provides model token breakdowns across Flash and Pro tiers.
   • Supports standard Omarchy collector CLI flags (--force, --limits-only).
2. Plugin Support (shell/plugins/agents/):
   • Added antigravity to default providers in manifest.json.
   • Added model title formatting for Gemini in Main.qml.
   • Updated documentation in shell/plugins/agents/README.md.

[bjarneo]

Automated duplication check: this pull request looks similar to #8479, which covers the same Antigravity usage collector. I keep that one open and close this one to consolidate review.

If you feel this is the wrong decision, please open the PR again with a note on the difference.