feat: add Antigravity installation guide and update README with compatibility information.

.antigravity/INSTALL.md

@@ -0,0 +1,56 @@
+# Installing Understand-Anything for Antigravity
+
+## Prerequisites
+
+- Git
+
+## Installation
+
+1. **Clone the repository:**
+   ```bash
+   git clone https://github.com/Lum1104/Understand-Anything.git ~/.antigravity/understand-anything
+   ```
+
+2. **Create the skills symlink:**
+   ```bash
+   mkdir -p ~/.agents/skills
+   ln -s ~/.antigravity/understand-anything/understand-anything-plugin/skills ~/.agents/skills/understand-anything
+   ```
+
+   **Windows (PowerShell):**
+   ```powershell
+   New-Item -ItemType Directory -Force -Path "$env:USERPROFILE\.agents\skills"
+   cmd /c mklink /J "$env:USERPROFILE\.agents\skills\understand-anything" "$env:USERPROFILE\.antigravity\understand-anything\understand-anything-plugin\skills"
+   ```
+
+3. **Restart the chat or IDE** so Antigravity can discover the skills.
+
+## Verify
+
+```bash
+ls -la ~/.agents/skills/understand-anything
+```
+
+You should see a symlink pointing to the skills directory in the cloned repo.
+
+## Usage
+
+Skills activate automatically when relevant. You can also invoke directly by saying:
+- "Run the understand skill to analyze this codebase"
+- "Use the understand-dashboard skill to view the architecture map"
+- "Use understand-chat to answer a question about the graph"
+
+## Updating
+
+```bash
+cd ~/.antigravity/understand-anything && git pull
+```
+
+Skills update instantly through the symlink.
+
+## Uninstalling
+
+```bash
+rm ~/.agents/skills/understand-anything
+rm -rf ~/.antigravity/understand-anything
+```

README.md

@@ -140,6 +140,13 @@ Fetch and follow instructions from https://raw.githubusercontent.com/Lum1104/Und
 
 Cursor auto-discovers the plugin via `.cursor-plugin/plugin.json` when this repo is cloned. No manual installation needed — just clone and open in Cursor.
 
+### Antigravity
+
+Tell Antigravity:
+```text
+Fetch and follow instructions from https://raw.githubusercontent.com/Lum1104/Understand-Anything/refs/heads/main/.antigravity/INSTALL.md
+```
+
 ### Platform Compatibility
 
 | Platform | Status | Install Method |
@@ -149,6 +156,7 @@ Cursor auto-discovers the plugin via `.cursor-plugin/plugin.json` when this repo
 | OpenCode | ✅ Supported | Plugin config |
 | OpenClaw | ✅ Supported | AI-driven install |
 | Cursor | ✅ Supported | Auto-discovery |
+| Antigravity | ✅ Supported | AI-driven install |
 
 ---
 

README.zh-CN.md

@@ -139,6 +139,13 @@ Fetch and follow instructions from https://raw.githubusercontent.com/Lum1104/Und
 
 克隆此仓库后，Cursor 会自动通过 `.cursor-plugin/plugin.json`文件发现插件。无需手动安装 — 只需克隆并在 Cursor 中打开即可。
 
+### Antigravity
+
+告诉 Antigravity:
+```text
+Fetch and follow instructions from https://raw.githubusercontent.com/Lum1104/Understand-Anything/refs/heads/main/.antigravity/INSTALL.md
+```
+
 ### 多平台兼容
 
 | 平台 | 状态 | 安装方式 |
@@ -148,6 +155,7 @@ Fetch and follow instructions from https://raw.githubusercontent.com/Lum1104/Und
 | OpenCode | ✅ 支持 | 插件配置 |
 | OpenClaw | ✅ 支持 | AI驱动安装 |
 | Cursor | ✅ 支持 | 自动发现 |
+| Antigravity | ✅ 支持 | AI驱动安装 |
 
 ---