Open-source · 109 lessons
Become an AI engineer,
one milestone at a time.
A structured, hands-on path from fundamentals to production AI systems — prompting, RAG, agents, evals, and fine-tuning, sequenced so every milestone builds on the last.
Free & open-sourceNo signup109+ hands-on lessons
Pick a track. Start building.
Deep-dive hubs — hands-on guides, audio walkthroughs, and flashcards.
Agentic Systems
Build a real multi-agent system — routing, worker pools, and a full observability plane.
ExploreRAG & Retrieval
Embeddings, vector search, and grounded answers — with audio guides and podcasts.
ExploreEvals & Testing
Ship safely: evals, red-teaming, and guardrails that prove it works.
ExploreLangGraph
Stateful agent graphs with checkpointed memory and human-in-the-loop.
ExploreLangSmith
Tracing and observability for production LLM apps.
ExploreMemorize
Spaced-repetition flashcards to lock in the core concepts.
Explore