Codex Done Right — From Codex Task Automation to Vibe Coding

In the AI era, you may not need to know coding, but you must know Git. The easiest and most detailed way to learn Git & GitHub

This course makes the core concepts of data structures and algorithms easy to understand through visual metaphors and testing tools. You will gain practical experience by implementing everything from the basics to sorting and searching.

A friendly course that even those who know nothing about coding can follow! The ultimate course that turns working developers into JavaScript experts!

A kind and easy course that even those who know nothing about coding can follow! The ultimate course that turns working developers into HTML & CSS experts!

Even those who know nothing about coding will be able to create their own automated stock trading program by giving commands to AI in Korean!

Learn React the easiest and fastest way with Explainer Captain Yalco's rich and solid course!

An era where just learning the basics isn't enough to survive. Dig deep and master Java once and for all!

Through the 25 patterns of OODP, you will learn various ways to design software in an object-oriented manner.

⚡ Short and sweet 90-minute course! Copy and paste the site's code to quickly learn GraphQL and how to use Apollo.

Quickly learn TypeScript's syntax and usage with the easiest explanations.

This course covers the core principles and practical techniques of Node.js that you must know before diving into professional frontend and backend development.

MySQL for non-majors! This lecture quickly skims through essential concepts with brief explanations, then allows you to learn MySQL hands-on by "playing" with examples on the site.

⚡ Short and sweet full 160-minute course! Copy and paste code from website to website and learn reactive programming with ReactiveX 😎

In the AI era, you don't need to know how to code. What matters is not development skills, but the ability to work with AI. This course is a hands-on lecture where non-developer professionals use Cursor AI to build their own tools for automating repetitive tasks. From Excel automation and document generation to webpage creation and business dashboards, you will follow step-by-step for 3 hours to complete your own results.

A hands-on course focused on directly automating repetitive work tasks such as document creation, data analysis, and report production using Claude. Through a systematic process of exploration, planning, implementation, and verification, you will learn to design AI workflows that handle various tasks, including meeting minutes, Excel, and PPT, as well as build automation processes without coding. Beyond simply learning features, you will develop the practical design skills needed to identify your own repetitive tasks and transform them with AI.

Even if you don't know coding, full-stack development, or Rails development, you can build a complex platform like Inflearn. Use Windsurf, Cursor, and Claude Code.

It doesn’t stop at following along to create a sample game. Using ChatGPT- and Codex-based vibe coding, you’ll learn the entire process through a real launch project: from game planning → development → mobile builds → AdMob ad integration → publishing on ONE store, Google Play, and the App Store.

Not an Excel course that ends when you finish learning, but one that makes your own tool “snap” into the ribbon. It’s time to stop letting VBA books become mere bookshelf decorations! Even without knowing a single line of code, you can create your own automation button simply by conversing with AI. Discover now, through this free course, how to create CustomUI-based add-ins—a method revealed from start to finish for the first time in Korea by a Microsoft Excel MVP.

This course is for those who don't know much about development but want to start "vibe coding," and for those who want to personally create a landing page to promote their own business (restaurant, cafe, etc.) or service (lawyer, accountant, hospital, etc.). I will help you establish the perfect starting point for vibe coding.

The time when your imagination becomes reality—we invite you to the world of 'Vibe Coding.' We have prepared this lecture for those of you who "don't know coding, but know exactly what you want to create." With the emergence of AI like ChatGPT and Claude, people say anyone can develop. But what happens when you actually try? - "It writes simple code well, but as the number of files increases, the AI forgets the previous context." - "It looks plausible, but it throws errors when executed, and when I ask to fix it, it gives even weirder code." You’ve likely had this experience at least once. I also experienced the same frustration when I first collaborated with AI. AI was an excellent 'assistant,' but it had limitations in seeing the big picture. However, after discovering the OpenAI Codex CLI and mastering a new method called 'Vibe Coding,' my development process changed completely. This lecture will solve the problems you are facing and transform you from a coder into a director who commands AI agents. Equip yourself with the powerful tool called Codex CLI and join me on an exhilarating journey of Vibe Coding to turn your imagination into reality.

Are you still coding alone? We are now in an era where AI handles 99% of the work. Instead of memorizing complex syntax, this course teaches you how to turn Google's powerful AI, 'Gemini Pro,' into your 24-hour AI development partner. You will learn the fundamental principles of Flutter using the paid Gemini Pro model for free and turn your ideas into reality through professional-level projects.

This is a process of developing a practical web service in collaboration with AI agents based on TARS prompt engineering principles. You will gain full-stack development experience covering everything from UI/UX component creation to CRUD functions, API integration, and data visualization, ultimately completing your own idea as a viable MVP.

From AWS EC2 backend operations to automatic error fixing, we are revealing the entire development process of Sidabari (https://github.com/cx8537/sidabari), a Claude Code-based automation tool. In this course, we provide all the actual prompts and conversation history used as learning materials, allowing you to experience the entire prompt input process involved in its creation.

Are you tired of repetitive tasks? This one lecture is enough. Combine Make, Apps Script, and AI to build your own business automation system. From souvenir recommendations to receipt OCR processing, this is a practical, hands-on course where you just need to follow along, even if you don't know coding.

How did Assistant Manager Kim, who worked overtime every day, become a "leave-on-time pro" in just 1 hour? The secret to reclaiming your "clock-out time" Staying up all night because an Excel formula broke, or having an entire report ruined by a single typo—every office worker has experienced this at least once, right? This course was designed to put an end to that "recurring pain." You don't need to memorize complex coding syntax. We utilize Cursor AI, an AI-powered tool that writes code based on text commands, and Streamlit, which allows anyone to easily create websites. I have captured the entire process of solving the "pain points" I personally faced in the field—such as merging files by branch, automatically classifying items for repair, and generating infinite PDF certificates—all by "conversing" with AI without typing a single line of Python code yourself. By the end of this course, you will be reborn not as a mere office worker, but as a "Digital Transformation Expert" who revolutionizes your team's work efficiency.

Using ChatGPT is completely different from developing an actual generative AI service. This is because you must master everything from API calls to conversation state management, structured outputs, function calling, document-based RAG, MCP integration, and AI agent implementation. Based on extensive experience in data analysis and AI instruction, this course explains complex concepts through Python-centered practice. You will learn step-by-step—from the principles of generative AI to the OpenAI Responses API, multimodal features, File Search-based RAG, external tool integration, and the Agents SDK—to complete a fully functional AI application.

If you want to create your own AI service without coding, this course is the perfect solution. Using the Dify no-code platform, you can create high-quality AI apps with just your ideas. Instead of complex theory, it's structured around hands-on projects, allowing both AI beginners and working professionals to develop practical skills.

Learn AI utilization methods and performance improvement strategies tailored to real-world business situations. (i.e., you won't learn things like automatic short-form video generation.) This is a practical course where you learn to leverage AI not merely as a tool, but as an ultimate instrument for business efficiency. By utilizing various generative AI and the latest AI agents such as ChatGPT, Gemini, NotebookLM, Gesnpark, Skywork, etc., you will master AI prompt utilization → AI data analysis → and AI task automation implementation, all at once. This class is optimized for planners, marketers, managers, founders, and others who wish to acquire business productivity and performance enhancement strategies directly applicable to their work.

Non-Majors Welcome: Real-World Vibe Coding Projects Created Through Conversations with AI

Even those who have never experienced even the basics of coding can create automation software with just a few clicks. I'm serious.

This is a practical course that uses Codex to connect business planning, website creation, marketing materials, task organization, and email automation. Even if you are not a developer, you will learn how to delegate tasks to AI and refine the results using Notion, Linear, Figma, and Google Workspace in an actual workflow sequence.

Using generative AI tools such as ChatGPT and Claude, you will turn ideas into actual web services and experience the entire development and operations process in a single project—from Docker containerization and server deployment to domain connection, HTTPS implementation, and CI/CD setup. Rather than simply generating code, you will develop practical skills by completing and maintaining a service that real users can access.

This is Korea's first free lecture covering how to utilize 'On-Device Vibe Coding' agents that are 100% free, offer unlimited tokens, and provide perfect security. We will build an on-device development agent that integrates Codex + Ollama + Open Source LLMs to overcome the limitations of cloud-based vibe coding tools, such as frequent token limit interruptions, rising subscription fees, and concerns over source code leaks.