The Absolute Basics of Git You Need to Know Before Asking AI to Do It

Learn how to efficiently manage multiple AI coding agents, including Claude Code, Codex, and pi, from a single screen. Starting with tmux concepts, you’ll practice using Herdr’s sessions, panes, plugins, and CLI to build an agent workflow that keeps your work running even when your SSH connection is interrupted. Complete the essential development environment for the Agent era in just one day.

This introductory course is designed to help even those new to Git safely record file changes and understand collaboration workflows through GitHub. Rather than simply memorizing commands, the focus is on developing the intuition to read the current state using status, diff, and log, and to choose the appropriate action among add, commit, restore, reset, and revert based on the situation. The course begins by explaining why Git is necessary and the difference between simple file saving and version control. Afterward, you will practice creating a repository, committing a README.txt file, and observing how Git tracks changes. You will also learn the basics of backing up and sharing personal projects online by creating GitHub remote repositories and mastering the push and clone workflow. The intermediate section covers branches, merge, conflict, pull/push, PR, rebase, and stash. You will learn how to divide work into branches, merge changes, and read and resolve files when conflicts occur. Additionally, you will build the ability to handle common Git complications in professional settings by understanding PR-centered collaboration workflows and the differences between reset and revert. The final section covers GitHub Flow and operational branching strategies. It explains the process where feature branches are merged into the development branch and promoted to the production environment through QA, centered on the dev → stg → prd workflow. By covering hotfixes, release branches, tags, partial deployments, emergency fixes, and rollback decisions, this course is structured to help you understand how Git is operated in actual team development.

When AI says “implementation complete,” do you take it at face value? This Step 2 course has Claude Code and Codex handle everything from understanding the repository to implementation, testing, review, and PRs, while teaching you to evaluate results based not on completion descriptions, but on the scope of approval, execution evidence, and change risks.

Experience the Jeju-based bootcamp online! Quickly create your own service! :)

It's okay if you don't know a single line of code. We are now in the era of 'Vibe Coding,' where you develop by 'conversing' with AI.

This is a Git course designed to help you become a top-tier web developer through in-depth lessons. By the time you complete the course, you will have a deep understanding of the essence of Git, allowing you to master this essential developer skill and use it with proficiency.

Design a modern 3-tier web service with AI and develop it using only "Vibe Coding," then deploy it to an AWS environment to complete a fully functional production service! We have included the entire sequence of configuration processes so you can experience core AWS services used in the industry—such as Amplify, CloudFront, ALB, EC2, S3, and RDS—in a single workflow.

The essence of GitHub lies in Git. If you know how to manage projects with Git, you can collaborate smoothly. If you use Git well, you can also use GitHub well. In this course, you can learn Git's principles and key CLI commands to apply them in your work.

Have AI document its decisions and reasoning in the project wiki every time it works, safeguard that wiki, and check it to ensure it doesn’t break months later. Build the disclosure alert bot for real, establishing rules one by one whenever something goes wrong.

This course teaches non-developers how to properly build, operate, and monetize a service using Claude Code. It provides template repositories and operational know-how so that non-developers and beginner developers alike can use Claude Code at the level of the top 1% of developers. This course will be especially helpful for those who want to build a service with Claude Code at a truly “professional developer” level; those who want to create a service capable of generating revenue through a one-person business or side project; those who have built something powered by an AI agent like Claude Code but are stuck because they lack the know-how to operate it properly; and those who feel overwhelmed as their solo project grows because bugs keep occurring and things become difficult to control whenever they add new features. The course also covers how to build a foundation for monetization and provides guidance on operating the service under the assumption that real customers will be using it. Once you have actual customers, processes such as monitoring errors occurring on the production server, server status, and logs are essential. However, there are surprisingly few places that teach these processes. In my course, along with this kind of detailed and professional operational know-how, I also explain how to enable AI to observe these monitoring metrics and data and take appropriate action.

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.

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.

“Please read the spec first and note anything that hasn’t been checked.” If you find yourself repeating the same explanation every time, it’s time to leave it in the project. This is a three-step course on connecting instructions, Skills, Hooks, and MCP to Claude Code and Codex, comfortably delegating repetitive tasks while ensuring people handle the important decisions.

For those who have hesitated to adopt Git and Github for collaboration or have given up for various reasons, this introduces Git basics and the GitFlow branching strategy. It's structured to help you learn Git and Github tailored to the specific characteristics of Unity projects.

This course is a 37-lesson, approximately 14-hour program that covers OpenAI’s AI coding agent, Codex, from start to finish. AI coding tools are now commonplace. However, most users remain at the level of accepting autocomplete suggestions or asking questions in a chat window. Agentic tools like Codex can do much more than that. They can read an entire project, modify multiple files simultaneously, run tests, and find and fix errors on their own. The problem is that they require an equivalent level of control. If you do not know what to allow and what to block, or how to teach the tool your project’s rules, you will end up cleaning up the code it creates afterward. This course focuses on how to establish that control. In the beginner section, you will learn installation and your first conversations, file editing and session management, and slash commands, while building a foundation in prompt writing. Through hands-on practice, you will internalize three principles: making clear requests, breaking down tasks, and verifying the results. The intermediate section is where the main content begins. You will configure behavior with config.toml, teach project rules with AGENTS.md, and manage memories with Memories. You will design safety boundaries yourself by combining the sandbox with four types of approval policies. The course then covers thread separation and parallel work, planning mode, connecting MCP servers, and creating custom skills based on SKILL.md. Finally, after covering web searches and Git automation, VS Code and Cursor integration, and hands-on FastAPI practice, you will examine Codex’s internal protocol, the SQ/EQ queue model. Understanding how the tool works changes how you respond when problems arise. The entire course follows the process of building a single service called TaskFlow. Rather than learning each feature in isolation, you will experience, in sequence, when and why each one is needed in a real project.

This is a full-stack restaurant map tutorial that allows you to learn everything from front-end, back-end, Kakao Map API usage, and deployment all at once while creating a restaurant map of your favorite YouTuber.

"Developer Portfolio Completion Practice for IT Job Seekers" is a practical course designed to transform projects created in class from simple outputs into portfolios and interview materials that can persuade recruiters. It covers step-by-step how to organize projects, design the first page, expand case studies into structured formats, and connect these elements to interview answers, application routines, and operation/improvement records. This course is particularly suitable for graduates and entry-level developers who have created a portfolio but lack confidence in it or feel lost about what to do next. Through this course, learners will move beyond simply having "made something" and learn how to reconstruct their projects into "documents and evidence that can be utilized for employment."

Is there any other language that is as difficult to set up as C++ in terms of development environment? I set up the development environment by following the information that is floating around, but why is it so difficult and complicated to build even once? Through this lecture, learn how to set up the C++ development environment easily anytime, anywhere, regardless of OS or platform!

Through this lecture, you can systematically learn core concepts such as an overview of the Git blame command, file history viewing options, checking and utilizing commit information, GUI tool integration (optional), and troubleshooting and tips.

In order to share with you the consulting/education/construction experience of DevOps specialist company Too Seed, we are introducing a lecture on Git Runbook. We will explain the overall contents from the structure of Git to the basic usage method and usage strategy.