Mete Atamel

GenAI is rapidly moving from simple “prompt-and-response” patterns to complex, agentic workflows. To support this shift, Google recently introduced the Interactions API, a new unified foundation designed specifically for building with both models and agents.

In this post, I’ll introduce the core concepts of the Interactions API and walk through some of the samples available in my genai-samples repository.

What is the Interactions API?

Traditionally, developers had to use the Gemini API to talk to the models and another framework like Agent Development Kit (ADK) to create and manage agents. Currently in beta, the Interactions API simplifies this by providing a single interface for:

In October 2024, Microsoft announced the Microsoft.Extensions.AI.Abstractions and Microsoft.Extensions.AI libraries for .NET. These libraries provide the .NET ecosystem with essential abstractions for integrating AI services into .NET applications from various providers such as Open AI, Azure, Google.

Today, we’re happy to announce the Google.Cloud.VertexAI.Extensions library. This is the Vertex AI implementation of Microsoft.Extensions.AI. It enables .NET developers to integrate Google Gemini models on Vertex AI via the Microsoft.Extensions.AI abstractions.

Let’s take a look at the details.

Google Antigravity transforms your regular IDE into an agentic development platform. In my previous blog posts, I showed some of the unique features of Antigravity compared to a regular IDE. In today’s blog post, I’ll talk about what makes Antigravity truly unique: Its ability to spin up and manage multiple agents.

Antigravity modes

Antigravity has two modes: Editor and Agent Manager.

Editor is your familiar IDE with an agent on the side to help you with tasks. You can read more about it in my previous blog post Google Antigravity Editor - Tips & Tricks and learn how to provide feedback to the agent in Provide Feedback to Google Antigravity and how to customize it in Customize Google Antigravity with rules and workflows.

At the heart of Google Antigravity is its ability to effortlessly gather your feedback at every stage of the experience. In this blog post, I will show you all the different ways you can provide feedback to Antigravity.

As the agent works on a task, it creates different artifacts along the way:

• An implementation plan and a task list (before coding)
• Code diffs (as it generates code)
• A walkthrough to verify the results (after coding)

These artifacts are a way for Antigravity to communicate its plans and progress. More importantly, they’re also a way for you to provide feedback to the agent in Google docs style comments. This is very useful to effectively steer the agent in the direction you want.

Google Antigravity is an agentic development platform where you have your familiar code editor along with a powerful agent on the side. In today’s post, I want to show you some tips and tricks for the code editor.

Setup and Extensions

In a typical setup, you’d have the editor, the terminal, and the agent visible:

If this is not the case, you can toggle terminal and agent panels as follows:

Google Antigravity was announced last week as the next generation agentic IDE. I’m very impressed with it so far. It already helped me to upgrade my blog to the latest Hugo (that I’ve been putting off for a long time). It even recognized that some of the shortcodes (eg. Twitter) from the old version changed in the new version and automatically updated my blog posts with the new version of the shortcodes. Nice!

The Gemini team at Google recently announced the File Search Tool, a fully managed RAG system built directly into the Gemini API as a simple, integrated, and scalable way to ground Gemini. I gave it a try and I’m impressed how easy it is to use to ground Gemini with your own data.

In this blog post, I’ll introduce the File Search Tool and show you a concrete example.

I’ve been exploring the Agent Developer Kit (ADK) and its powerful callbacks feature. In this blog post, I want to outline what callbacks are and provide a sample agent with all the callbacks implemented for a quick reference and testing.

At its core, an agent framework like ADK gives you a sequence of steps:

receive input → invoke model → invoke tools → return output

In real-world systems, we often need to hook into these steps for logging, guarding, caching, altering prompts or results, or dynamically changing behaviour based on session state. That’s exactly where callbacks come in. Think of callbacks as “checkpoints” in the agent’s lifecycle. The ADK framework automatically calls your functions at these key stages, giving you a chance to intervene.

A few days ago, I saw Logan Kilpatrick’s Tweet about the new AI-first vibe coding experience in AI Studio:

Introducing the new AI first vibe coding experience in @GoogleAIStudio! Built to take you from prompt to production with Gemini, and optimized for AI app creation. Start building AI apps for free : )

More updates and features to come! pic.twitter.com/HpI7Dsl8Bj

— Logan Kilpatrick (@OfficialLoganK) October 21, 2025

Last time I tried AI Studio for vibe coding, it was mostly a single-page web application with all the code in a single file (which wasn’t ideal).

Last year, we announced the Google Gen AI SDK as the new unified library for Gemini on Google AI (via the Gemini Developer API) and Vertex AI (via the Vertex AI API). At the time, it was only a Python SDK. Since then, the team has been busy adding support for Go, Node.js, and Java but my favorite language, C#, was missing until now.

Today, I’m happy to announce that we now have a Google Gen AI .NET SDK! This SDK enables C#/.NET developers use Gemini from Google AI or Vertex AI with a single unified library.