Free · Project-first · Beginner → Agentic
From "Java dev who knows no Python" to RAG, LLMs and agentic systems — through explainers you drive, engines you build from scratch, and systems you ship to production.
Ten phases, each with topic-by-topic guides, checkpoints, and a portfolio artifact. Click a phase for its full guide.
Play it, see it working, build the engine yourself, then ship the system around it.
The game: earn GRAD-1's six parts in mini-games — leakage, splits, losses, learning rates — assemble, train, then survive 3 debugging missions.
Start forging → 🎨55 concepts you can click, drag and break — backprop, attention, RAG, agents. Progress tracked, ←/→ to flow.
Start seeing → 🔨16 staged, test-driven from-scratch builds: autograd, mini-PyTorch, GPT, RAG engine, vector DB. Green tests = you get it.
Start building → 🏗️8 deployable systems around the model — RAG with verified citations, guardrails, agent sandboxes, evals. 100% free stack.
Start shipping → 🏛️The sibling site: CCA-F exam prep as a game — the Agent Hangar, 26 explainers, quizzes, missions.
Enter the hangar →