# Antigravity (Gemini IDE) Integration
Antigravity is Google's AI-powered IDE built on VS Code with deep Gemini integration.
## MCP Configuration
Edit your MCP config file:
- **macOS:** `~/.gemini/antigravity/mcp_config.json`
- **Windows:** `%USERPROFILE%\.gemini\antigravity\mcp_config.json`
```json
{
"mcpServers": {
"smart-coding-mcp": {
"command": "npx",
"args": [
"-y",
"smart-coding-mcp",
"--workspace",
"/absolute/path/to/project"
]
}
}
}
```
> **Note:** Antigravity does **NOT** support `${workspaceFolder}`. You must use absolute paths.
---
## Configuring Agent Rules
Antigravity supports powerful agent rules to control AI behavior.
### Rule Locations
| Scope | Location |
| ------------------- | ----------------------------------------- |
| **Global** | `~/.gemini/GEMINI.md` |
| **Workspace** | `.agent/rules/*.md` |
| **Project Context** | `GEMINI.md` or `AGENT.md` at project root |
### Creating a Rule to Use Smart Coding MCP
1. **Create the rules directory** in your project:
```bash
mkdir -p .agent/rules
```
2. **Create a rule file** `.agent/rules/smart-mcp.md`:
```markdown
---
trigger: always_on
description: Mandatory usage of Smart Coding MCP tools for dependencies and search
---
# Smart Coding MCP Usage Rules
You must prioritize using the **Smart Coding MCP** tools for the following tasks.
## 1. Dependency Management
**Trigger:** When checking, adding, or updating package versions (npm, python, go, rust, etc.).
**Action:**
- **MUST** use the `d_check_last_version` tool.
- **DO NOT** guess versions or trust internal training data.
- **DO NOT** use generic web search unless `d_check_last_version` fails.
## 2. Codebase Research
**Trigger:** When asking about "how" something works, finding logic, or understanding architecture.
**Action:**
- **MUST** use `a_semantic_search` as the FIRST tool for any codebase research
- **DO NOT** use `Glob` or `Grep` for exploratory searches
- Use `Grep` ONLY for exact literal string matching (e.g., finding a specific error message)
- Use `Glob` ONLY when you already know the exact filename pattern
## 3. Environment & Status
**Trigger:** When starting a session or debugging the environment.
**Action:**
- Use `e_set_workspace` if the current workspace path is incorrect.
- Use `f_get_status` to verify the MCP server is healthy and indexed.
```
### Activation Modes
| Mode | Description |
| ---------------- | ---------------------------------- |
| `always_on` | Rule is always applied |
| `manual` | Activated when mentioned in prompt |
| `model_decision` | AI decides based on description |
| `glob` | Applied to matching file patterns |
### Global Rules
For rules that apply to all projects, edit `~/.gemini/GEMINI.md`:
```markdown
# Global Agent Rules
- Always verify package versions before installing
- Prefer semantic search when available
```
