Google Antigravity trigger declaration is not take effect when generating

[inusedname]

My .rulesync rule:

---
root: false
targets:
  - '*'
description: Use when working UI creation/modification task
globs: []
cursor:
  alwaysApply: false
antigravity:
  trigger: "model_decision"
---
# UI Style Guide — ABC Design System

> This document is a guardrail for agents working on this project. It describes what
> design tokens and components already exist so you can reuse them rather than
> reinventing the wheel.

But when use rulesync generate --targets "antigravity" --features "rules" it does not apply trigger model_decision.