AI Harness · by Luoxiaoshan

Understand the logic under the hood
and master the Agent Harness end to end

From LLM fundamentals to Agent engineering, from prompt engineering to context engineering.
186 interactive lessons that walk you from "getting an API to work" to "reading a production-grade Coding Agent"—plus a bonus chapter on entrepreneurship.

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54core topics

186lessons

135+interactive demos

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CURRICULUM

54 topics · seven parts + a dessert

From LLM fundamentals to prompt engineering, from hands-on Agent work to production-grade Harness design patterns, and on to Grok Builds Rust source and the vibe-coding collaboration rules. Each topic stands alone—learn what you need, revisit anytime. Plus a dessert: Lei Jun’s entrepreneurship course, all about products and business.

FOR WHO

Who is this course for

AI product managers

You don’t want to stop at "tweaking prompts" — you want to understand the fundamentals, talk to engineers, and make sound product decisions.

Career switchers & newcomers

You have a product or business background and want to systematically build AI knowledge and a transferable, durable mental model.

Founders & solo developers

You want to build real, usable features with AI and care about the trade-offs of cost, quality, and shipping.

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Try Xiaoshan’s AI work →

Alice — a real, shipped AI Agent desktop app; the hands-on cases in this course all come from it

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All lessons are free, and every chapter’s first two lessons are open—sign in to unlock the rest.

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