Gemini Antigravity

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 event	Normalized to
Running status	`session.status_running`
Assistant text	`agent.message`
Tool use	`agent.tool_use`
Tool result	`agent.tool_result`
Completion	`session.status_idle`

See Internal SDK contract for the Rust SDK types.

Get started

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Engineering

Prerequisites

1. Add your Gemini API key

2. Select the built-in runtime

3. Create an agent

4. Start a session with repo context

5. Stream events

​Prerequisites

​1. Add your Gemini API key

​2. Select the built-in runtime

​3. Create an agent

​4. Start a session with repo context

​5. Stream events

Prerequisites

1. Add your Gemini API key

2. Select the built-in runtime

3. Create an agent

4. Start a session with repo context

5. Stream events