Antigravity Customization Manager

Master your Google Antigravity & AI Agent rules, skills, and token budgets across global and workspace scopes.

Overview

Antigravity Customization Manager is a lightweight, zero-bloat control center for managing, authoring, and monitoring Rules, Skills, and Token Budgets used by AI coding agents across the Google Antigravity ecosystem and compatible environments.

It provides visual token budget meters to prevent silent rule demotion, file size guardrails, skill shadowing detection, a scaffolding wizard, and 1-click cross-agent sync to other major AI coding assistants.

Compatibility

• Editors: Visual Studio Code, Google Antigravity Standalone IDE, Cursor, and other VS Code-compatible editors.
• Antigravity Extension: Official Google Antigravity extension 1.3.0+, AGY backend 1.2.2+.
• Platforms: Windows, macOS, Linux.

Features

Rules Governance & Lifecycle

• Multi-Scope Rule Discovery:
  • Global Rules: Discovered from ~/.gemini/config/rules/*.md (system-wide machine rules).
  • Workspace Root Rules: Discovered from GEMINI.md and AGENTS.md at repository roots.
  • Workspace Modular Rules: Discovered from .agents/rules/*.md (or .agent/rules/).
• Precision Antigravity Budget Guardrails:
  • 24 KB / 24,000 Byte Cap: Visual warning before rule files get truncated on line boundaries.
  • 20,000 Token Aggregate Budget: Live meter monitoring rule consumption to prevent rules from being demoted from inline text to path pointers.
• Rule Templates: Scaffold governance policies with built-in templates (Developer SOP & Release Gates, Architecture Boundaries, Git Index Protection, Anti-AI Slop Guidelines).
• Toggle State: Enable or disable rules temporarily without deleting files.

Skills Engine & Progressive Disclosure

• Multi-Tier Skill Discovery:
  • Workspace Skills: .agents/skills/<name>/SKILL.md (highest precedence).
  • Global Plugin Skills: ~/.gemini/config/plugins/<plugin>/skills/.
  • Built-in Skills: ~/.gemini/antigravity/builtin/skills/.
• Precedence & Shadowing Detector: Visual indicators when a workspace skill overrides or shadows a global/built-in skill.
• Skill Scaffolding Wizard: Step-by-step generator for standard-compliant skills with verified YAML frontmatter (name, description) and directory structures (scripts/, references/, examples/).
• Fork to Workspace: Clone any built-in system skill or plugin skill directly into .agents/skills/ of the current workspace with a single click.

Multi-Agent Cross-Bridge

• Write rules once and sync them to other popular AI coding assistants:
  • Universal Standard: AGENTS.md (Linux Foundation standard for Antigravity, OpenAI Codex, and multi-agent workflows)
  • OpenAI Codex: CODEX.md
  • Cursor: .cursorrules / .cursor/rules/*.mdc
  • Claude Code: CLAUDE.md
  • GitHub Copilot: .github/copilot-instructions.md

Zero-Bloat Architecture & Native Experience

• Performance: Vanilla TypeScript and Webview API. Zero third-party web frameworks, zero telemetry, instant boot.
• Bilingual Support: Instant toggle between English and Bahasa Indonesia.
• Native Theme Support: Automatically matches VS Code Dark Modern, Light Modern, High Contrast, and OS system themes.
• Status Bar Integration: Real-time summary indicator of active rules and budget health with warning badges.

Commands

All commands are accessible from the Command Palette (Ctrl+Shift+P / Cmd+Shift+P):

Configuration

Customize settings via your editor's settings.json:

{
  // Custom override path to Antigravity directory (~/.gemini). Auto-detected if blank.
  "boygr.antigravityCustomizationManager.customAntigravityPath": "",

  // Aggregate token budget for always-on rules before pointer demotion occurs
  "boygr.antigravityCustomizationManager.defaultRulesBudget": 20000,

  // Per-rule file size limit in bytes before hard boundary truncation occurs
  "boygr.antigravityCustomizationManager.ruleFileSizeLimitBytes": 24000,

  // Display active rules and skills summary indicator in the status bar
  "boygr.antigravityCustomizationManager.showStatusBarItem": true,

  // UI display language: "auto", "en", or "id"
  "boygr.antigravityCustomizationManager.defaultLanguage": "auto",

  // Enable 1-click cross-agent rule export capabilities
  "boygr.antigravityCustomizationManager.enableMultiAgentSync": true
}

Installation

From VSIX Package

1. Download the latest antigravity-customization-manager-0.1.0.vsix from GitHub Releases.
2. Install via editor:
   • GUI: In the Extensions view (Ctrl+Shift+X), click ... at the top right and choose Install from VSIX....
   • CLI:

     # Visual Studio Code
     code --install-extension antigravity-customization-manager-0.1.0.vsix
     
     # Google Antigravity IDE
     antigravity --install-extension antigravity-customization-manager-0.1.0.vsix
     
     # Cursor
     cursor --install-extension antigravity-customization-manager-0.1.0.vsix
     

Development

# Install dependencies
npm install

# Compile TypeScript and bundle with esbuild
npm run compile

# Package production VSIX
npm run package:vsix

License

• Author: Boy Gilang Ramadhan
• License: MIT License
• Disclaimer: Not affiliated with or endorsed by Google LLC. Google Antigravity is a trademark of Google LLC.