I Rebuilt Google's ADK Visual Builder Using Gemini 3 & AI Studio (Better than Original?)
In this video, I’m testing the limits of the new Gemini 3 model inside Google AI Studio. I wanted to see if I could replicate—or even improve upon—Google’s official Visual Builder for the Agent Development Kit (ADK) without writing a single line of code manually.
The results were shocking. Not only did Gemini 3 build a fully functional Visual Builder, but it also created a complete SaaS-style application with documentation, simulation tools, and deployment scripts.
What I will cover in this video:
- The Challenge: Can we bypass the code-heavy nature of the standard ADK?
- The Build: Creating a hierarchical agent builder using only prompts in AI Studio.
- The Demo: Building a "Dad Joke" agent and a complex "Financial Advisor" multi-agent system live.
- Deployment: Exporting the agent to Google Cloud Shell, running it in Google Colab, and deploying to Cloud Run.
The Verdict: Does this custom tool replace the official ADK Visual Builder? If you are interested in Agentic AI, No-Code development, or seeing the raw power of Gemini 3's coding capabilities, this video is for you!
🚀 Key Features of my Custom Builder:
- Visual Drag-and-Drop Interface
- Multi-Agent & Hierarchical Support
- Built-in Tool Integration (Google Search, Code Execution)
- Live Simulation & Execution Traces
- One-click export to Colab & Cloud Shell