Skip to main content
The Gemini Antigravity runtime lets LAP create and run Gemini-backed managed agents through the same session API used by the other runtimes. LAP normalizes Gemini interaction events to the shared runtime event stream.

​
Prerequisites

  • LiteLLM Agent Platform running
  • Gemini API key

​
1. Add your Gemini API key

Open Settings → Credentials in the UI and add your Gemini API key. Or via the API: 
curl -X PUT $LAP_URL/api/agent-runtimes/gemini_antigravity/credentials \
  -H "Authorization: Bearer $MASTER_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "api_key": "<your-gemini-api-key>",
    "api_base": "https://generativelanguage.googleapis.com"
  }'

​
2. Select the built-in runtime

gemini_antigravity is a built-in runtime. You do not need to register a custom runtime harness unless you are proxying through your own Gemini-compatible service.

​
3. Create an agent

In the UI, click New Agent, choose gemini_antigravity as the runtime, and save. Or via the API: 
curl -X POST $LAP_URL/api/agents \
  -H "Authorization: Bearer $MASTER_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "my-gemini-agent",
    "owner_id": "local-user",
    "runtime": "gemini_antigravity",
    "model": "antigravity-preview-05-2026",
    "system": "You are a coding assistant.",
    "tools": [
      { "type": "code_execution" },
      { "type": "google_search" },
      { "type": "url_context" }
    ]
  }'

​
4. Start a session with repo context

Gemini sessions accept environment fields for repository context: 
SESSION=$(curl -s -X POST $LAP_URL/session \
  -H "Authorization: Bearer $MASTER_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "runtime": "gemini_antigravity",
    "agent_id": "<agent-id>",
    "prompt": "Review this repository and summarize the main risks.",
    "environment": {
      "repository": "https://github.com/your-org/your-repo",
      "ref": "main"
    }
  }' | jq -r .id)

​
5. Stream events

curl -N "$LAP_URL/v1/sessions/$SESSION/events/stream" \
  -H "Authorization: Bearer $MASTER_KEY"
Gemini interaction events are normalized to the shared runtime event surface:
Gemini eventNormalized to
Running statussession.status_running
Assistant textagent.message
Tool useagent.tool_use
Tool resultagent.tool_result
Completionsession.status_idle
See Internal SDK contract for the Rust SDK types.