TinkerHub Classrooms is a hands-on journey into the fundamentals of software engineering. We’ll start by building a ChatGPT-style chatbot from scratch, understanding the systems, abstractions, and engineering decisions behind it instead of treating them as magic. Along the way, we’ll go old school: write code, read docs, debug, experiment, and build things ourselves. The ultimate goal is to build the foundations needed to create something like Codex, developing the mental models, programming fundamentals, and engineering instincts required to build powerful AI systems.