I Built a Multi-Step AI Agent in One Day with Google ADK — Here's What Nobody Tells You

I'm a final-year computer science student. I spend most of my days training deep learning models on image datasets, debugging tensor shape errors at 2am, and convincing myself that 67% accuracy is "a solid baseline." I do not, normally, build AI agents. But when Google Cloud NEXT '26 dropped last week and I saw the announcements around ADK 2.0 and the new Gemini Enterprise Agent Platform, I got genuinely curious. Not marketing-brochure curious — actually curious. Because the thing they kept sayi