Gemini Interactions API Skill

This skill provides instructions for authenticating, connecting to, and utilizing the stateful, server-managed Gemini Interactions API on Gemini Enterprise Agent Platform.

The Interactions API is the modern, recommended way to execute Generative AI agent conversations, background research tasks, multi-turn chats, and structured, multi-step workflows.

[!IMPORTANT] CRITICAL: Unified SDK & Latest Models

• Unified SDK: Use the Google Gen AI SDK (google-genai >= 2.0.0 for Python, @google/genai >= 2.0.0 for JS/TS). Legacy SDKs like google-cloud-aiplatform, @google-cloud/vertexai, and google-generativeai are strictly unsupported for Interactions.
• Latest Models Only: Use gemini-3.1-pro-preview, gemini-3.1-flash-lite, gemini-3-flash-preview, gemini-2.5-pro, or gemini-2.5-flash. Refer to the latest model versions to check for new updates. Legacy models (gemini-2.0-*, gemini-1.5-*) are deprecated and do not support interactions.
• Turn-Scoped Parameters: Parameters like tools, system_instruction, and generation_config are turn-scoped. They MUST be passed with each interaction request.

1. Authentication

Before running any code, ensure you are authenticated with Application Default Credentials (ADC) and have the necessary API enabled.