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AI systems and software engineering, explained without the hype. I build production systems with and without AI every day and teach what I learn. Not the beginner stuff. If you want to know how these things actually work, and why they break, this is for you. WHAT'S HERE FOR YOU ? - Agent internals: the loop, the harness, context, tools, MCP - Retrieval that ships: RAG, chunking, reranking, drift - System design: agentic and distributed, what interviews ask - Failure autopsies: what broke, and the guard that stops it - The words everyone nods at idempotent, back-pressure, grounding - Ship discipline: migrations, rollouts, repos an agent can't break Vendor-neutral by design, as i believe the tools change, the mechanisms don't. Examples come from whatever I'm building myself or with Claude Code, model APIs, open weights, but the point is the pattern, not the product. Every video leaves you one thing you can change tomorrow. New every day, under a minute each.