In this article

    AI agents from scratch
    AI fundamentals

    AI agents from scratch

    Julien SéaillesJulien Séailles
    January 13, 2026

    AI has moved beyond simple text generation: now, it takes action. But how did we transition from passive chatbots to autonomous agents capable of coding, reasoning, and collaborating?

    This video traces the evolution and foundational concepts of AI Agents. We break down the invisible mechanisms that drive their power, from Function Calling to persistent memory, we analyze why the development ecosystem (Cursor, VS Code) has become their primary playground in 2025.

    Beyond the tech, we explore the concrete integration of these technologies into real-world products as well as the architecture of the future: from complex multi-agent systems to reinforcement learning.

    Finally, we move from theory to practice to build your own custom agent, without coding, with UBIK.

    From Alan Turing's legacy to the tools of tomorrow, here is everything you need to understand this revolution and fully leverage it.

    Discover more at ubik-agent.com.


    Julien Séailles

    Written by

    Julien Séailles

    Julien is the founder and CEO at UBIK.

    Further reading