AI-First and Codex practice course: AI-First mindset, prompt engineering, Codex use and agent building - from a vague idea to a full solution



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🕒Last updated: 08/27/2026
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AI First and Codex practice course

Course Intro

AI-First and Codex practice is a course for the AI era, covering AI-First mindset, prompt engineering, Codex use and agent building. Co-taught by several instructors, it moves from LLM basics and context management, to combining an Obsidian note vault with AI, creating Skill workflows, multi-platform content generation, and Codex practice (PPT making, video editing, dynamic workflows). Balancing theory and hands-on work, it helps you gain the ability to turn a vague idea into a complete AI solution.

Course Catalog

Yu-ge: AI-First intro; LLMs and prompts; context, tokens and multi-turn dialogue; hallucination, agents and markdown; how Codex differs from a plain chat box; Codex's four basic settings; from vague to precise prompts; organizing messy info into Skills; practice three - from one idea to a full solution; and a summary on using AI and Codex going forward. A-lin: notes-as-files logic of Obsidian; key config to make Obsidian usable; writing intro without depending on Markdown; bidirectional links; retrieval-first over folders; connecting Claudian as the AI engine; Web Clipper bridging the internet to your vault; AI reading a set of articles for you; multi-platform writing from one material; letting AI see your note structure. Xiao-mo: what a Skill is; running ready-made Skills; creating your first Skill.

Supporting Study Materials

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