Mastering Claude Code: From AI Development Workflow Basics to Real-World Practice
Explore → Plan → Implement → Commit. Master a proven AI development workflow with Claude Code. Learn everything from MCP and sub-agents to prompt engineering through 23 missions, and complete 3 real-world projects.
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Hello, I'm Gym Coding!
The Claude Code PPT Creation Lecture that many of you have been curious about has finally been added! 🎉
A new lesson has been uploaded to Section 30. Creating Your Own Workflow, and in this lecture, it doesn't just stop at simply creating a PPT.
What is covered in this lecture
Directly creating a web PPT skill that fits the official document structure using skill-creator
Research collection method using sub-agents in parallel
A practical course for reviewing and editing AI-generated results
The entire pipeline of packaging completed skills into plugins and registering them on the marketplace
You can learn everything at once—from creating skills and bundling them into plugins to uploading them to the marketplace and sharing them with other projects or team members.
😊 To those currently taking the course
Whenever a new lecture is added, you can take it immediately at no additional cost. Check it out right now!
And if the course was helpful, a one-line review would be a huge help. If you haven't left a review yet, I would appreciate it if you could leave even a short one! 🙏
🎯 For those who haven't taken the course yet
The skill systems, sub-agents, and plugin marketplaces covered in this lecture are the core features of Claude Code. This course allows you to systematically learn these functions from the basics to practical application, so if you've been interested, please take this opportunity to check it out!
Thank you! 👏
Hello, I'm GymCoding.
What is the difference between skills and plugins? How did you make the PPT?
Since these questions have been coming up often lately, I'm preparing a proper video about it!
So, I am preparing a proper additional video!
I won't just be showing you how to make a PPT; I will cover everything from creating your own skills, packaging them as plugins for reuse across multiple projects, and registering them on the marketplace to share with your team. I'm going to properly show you how to utilize Claude Code in practical work beyond just development.
What we cover in this video
The entire process of creating a Web PPT skill directly from scratch
Create a skill that fits the official documentation structure with skill-creator
Research collection utilizing sub-agents in parallel
How to share completed skills through the Plugin + Marketplace
I plan to upload this as an additional lecture within this week. Also, I will be providing the skill files created in the video to all students.
😊 To those currently taking the course
If the lecture was helpful, a one-line review would be a great help. Each of your reviews is the driving force behind creating better lectures. If you haven't left a review yet, I would be very grateful if you could leave even a short one! 🙏
🎯 To those who haven't taken the course yet
Development using AI has now become a necessity, not an option.
Recent Reviews
Even as a non-developer in the AI era, I took this course while looking for a way to create my own service. As a result, I am extremely satisfied, to the point where I have absolutely no regrets about choosing this course. The content was substantial, but above all, the instructor's delivery was so excellent that I could understand and follow along despite the difficult subject matter. Although I still have a long way to go, I plan to study steadily through review. Thank you for providing such a great lecture!
This is a course where you can systematically learn the skills, sub-agents, and plugin systems covered in this video, from the basics to practical application. If you are interested, please check it out!
👉Enroll now at a discounted price
Thank you! 👏
Hello, I'm GymCoding!
The update for the Agent Team Advanced Course I mentioned has been completed! 🎉
You can check it out in the lecture right now.
Added Content
It covers 4 core strategies for using agent teams in practice with half the cost and double the quality.
Differences in Context Inheritance — Accurately understanding the core differences in skill inheritance between team members vs. sub-agents
Plan Approval — Block token waste at the source with a pre-implementation plan approval workflow
Model Mixing & Cost Optimization — Drastically reduce costs by configuring Leads with Opus and Team Members with Sonnet + 4 cost-saving strategies
Hooks Automatic Quality Gate — Automation that blocks completion via TaskCompleted hook until tests are passed
💬 To those currently taking the course
If the course was helpful, a one-line review would be a huge help. Each of your reviews is the driving force behind creating better courses. If you haven't left a review yet, I would be truly grateful if you could leave even a short one! 🙏
⏰ Update celebration discount, ending soon!
Development using AI has now become a necessity, not an option.
Recent Reviews
Even though I am a non-developer in the AI era, I came across this course while looking for lectures to build my own service. As a result, I am extremely satisfied, to the point where I have absolutely no regrets about choosing this course. The content was substantial, but above all, the instructor's delivery was so excellent that I was able to understand and follow along despite the difficult subject matter. I still have a lot to learn, but I will continue to study through review. Thank you for providing such a great lecture!
For those who have not yet enrolled, a special update commemorative discount is currently in progress.
Including this advanced course, the opportunity to learn everything from the basics to practical agent team application at this price is rare. If you have been interested, please make sure to check it out before the discount ends!
👉Enroll now at the discounted price
Thank you! 🙇♂
Hello, I'm Gym Coding!
Claude Code Mastery course has surpassed 3,234 students within just three months of its release! 🎉🎉
It's been described as exceptional even on Inflearn for so many students to gather in such a short period, showing just how much interest there has been. I would like to express my sincere gratitude to everyone who has taken the course.
To show our gratitude, we are planning to add a new Advanced Agent Teams section.
Details of this update
We cover four core strategies for using agent teams in practice at half the cost and double the quality.
Differences in Context Inheritance — Accurately understanding the core differences in skill inheritance between team members vs. sub-agents
Plan Approval — Block token waste at the source with a pre-implementation plan approval workflow
Model Mixing & Cost Optimization — Significantly reduce costs by configuring Leads with Opus and Team Members with Sonnet + 4 cost-reduction strategies
Hooks Automated Quality Gate — Automation that blocks completion via TaskCompleted hooks until tests are passed
The slides, configuration files, and prompt templates used in the lecture are also provided to the students.
⏰ Large-scale update commemorative discount, ending tomorrow (3/5)!
Currently, a final special discount is underway to celebrate the major update.
The discount ends tomorrow (3/5).
We have received so many inquiries via email after the discount period ended. "Will there be another discount?" "I missed it, is there any way..." Since these inquiries keep coming in, I am letting you know in advance so that no one misses out.
This is your last chance to enroll at this price, so if you've been interested, please make sure to check it out!
💬 To current students
Those who are already enrolled can watch the new lectures immediately without any additional payment!
If the lecture was helpful, a single line of review would be a great help. Each of your reviews is the driving force behind creating better lectures. If you haven't left a review yet, I would truly appreciate it if you could leave even a short one! 🙏
Thank you so much!! for choosing my lecture!!!
🙇♂
Hello, this is Gym Coding.
Introducing the Claude Code Master v2.0 2nd update.
The core of this update is Agent Teams. While Claude Code was previously a solo assistant, now multiple AIs form a team to work simultaneously. They communicate with each other, divide tasks, and automatically take on the next steps.
🔥 Key Updates
First Impressions of Agent Teams — How it Works - Showing the actual operation screen first
Sub-agents vs. Agent Teams: Differences and 5 Key Takeaways - Differences from sub-agents, key terminology, display modes, team structure and communication methods, and a follow-along practice session
Practical Application of Agent Teams — Future updates based on your needs👍
🧑🎓 For those already enrolled
The Agent Teams lecture has been added. You can take the course right away.
And I have one favor to ask. If my lecture was even slightly helpful, please leave just a one-line review. Your single line gives me the strength to create the next update.
🙋♂ For those who haven't started yet
Claude Code is evolving rapidly. With the addition of Agent Teams, we have entered an era where AI, which used to work alone, now operates as a team.
This course is where you can learn about these changes the fastest and most systematically.
"Video updates, not just text, after the course launch? And even additional videos? I signed up just by looking at the curriculum without even checking the reviews. And it was a great course with no section to waste, and I think I made a great decision to take it."
— Actual Student Reviews
🔥 Celebrating Agent Teams Update — Special 30% Discount
To celebrate the Agent Teams update, we are offering a limited 30% discount for 7 days. The discount ends on March 5th at midnight (D-7).
Hello, this is Gym Coding.
We are pleased to announce the Claude Code Master v2.0 update.
🔥 Key Changes (8 sections, 19 lectures)
Installation guide for macOS/Windows completely re-recorded + added video for resolving Windows environment variable issues
Token-saving default model settings, the relationship between the status bar and token usage — 2 new videos
Slash Commands, Status Bar, Output Styles — All 4 lectures re-recorded
CLAUDE.md Memory Management re-filming + Modular Rules, Auto Memory new videos
Added advanced features including Enhanced Plan Mode, Extended Thinking, and Custom Command Skill integration
👉 Course duration changed from 16 hours 10 minutes → 17 hours 43 minutes
👉 Check updates: https://www.gymcoding.co/courses/claude-code-master/changelog
🧑🎓 For those already enrolled
Thank you so much for choosing my lecture. The interest, reviews, and questions from my students have been the driving force that allows me to continuously update the course. Thank you!
And if my lecture was even a little bit helpful, I would be truly grateful if you could leave a review.
Your single line of feedback gives me the strength to create the next update.
👉Go to leave a review: https://inf.run/r4Wib
🙋♂ For those who haven't started yet
There is a question that those considering an AI course ask most frequently.
AI is no longer an option, but a necessity.
If you are interested in Claude Code, I highly recommend my lecture.
Recent Course Reviews
After feeling a sense of crisis and deciding to study AI in earnest,
I happened to start with Gym Coding's YouTube and eventually took this course.
To be honest, I hesitated quite a bit before taking the course.
There are so many AI-related courses, but since technology and trends in this field change so rapidly,
I wondered if I would be learning outdated content the moment I started the course.
Would it just end with learning simple prompt usage and the existence of various tools?
If so, is it worth paying for a course? These were my thoughts.
However, looking at the curriculum table of contents before deciding, I liked it quite a bit.
Not only that, I could see that the course was being continuously updated based on the latest standards.
Updating videos, not just text, after the course launch?
And even adding extra videos?
I signed up just by looking at the curriculum without even checking the reviews.
And now, as the main lectures are almost finished and only the additional lectures remain, I am leaving this review.
I believe it was a great course with no section to waste, and I'm glad I decided to take it.
The progression filled with Gym Coding's know-how based on real-world projects was excellent.
Thanks to this, I gained a lot beyond just simple studying.
Thank you to Gym Coding and Inflearn.🔥 A special discount is currently available to celebrate the v2.0 update 🔥
→ Discount Application Link: https://gymcoding.co/vip
Thank you.
Best regards, GymCodingHello, this is Gym Coding! 😊
The Practical Guide to Token Optimization lecture has been updated!
What you will learn in this lesson
Structural causes and mechanisms of token depletion
Customized strategies for Pro/Max plans
opusplan settings - Automatic switching between Opus for planning and Sonnet for coding
6 Practical Saving Tips - /clear, /compact, MCP Tool Search, etc.
Context Engineering - Core techniques to reduce costs and improve AI quality 🔥
🎁 Special Offer: Download Lecture Slides
I have uploaded a slide summarizing the key points in a checklist format as a course material.
You can download it directly from the course materials section at the bottom of the lecture page.
A major update is also in the works, but I'm uploading some helpful content first 🙂
👉Watch additional lectures now
If the lecture was helpful, leaving a review would be a great help 🙏
Thank you. 🙏
Best regards, Gym Coding
･
Edited
Hello, this is Gym Coding.
First of all, I would like to express my sincere gratitude to everyone who is taking the Claude Code course.
To be honest, I didn't expect so many people to love this course. Currently, a total of 2,005 students are with us, and every time I read the reviews you've thoughtfully left, I can feel how seriously you are all approaching your studies.
The Inflearn team also mentioned that it is very unusual for so many students to show interest in such a short period of time, and we even held a separate meeting. All of this is thanks to you, the students.
Thanks to you, I am continuing to refine the lectures with a mindset of "I need to make this even better."
With that in mind, I have prepared a major update. In fact, it's not just once, but twice.
1⃣ First Update
"Directly reflecting Q&A from over 2,005 students into the lectures"
We have conducted a complete analysis of all the questions and troubleshooting issues submitted by students so far. In this update, we are incorporating these insights directly into the lectures.
Partial changes to existing lecture video content (reflecting updated specifications, screens, etc.)
Adding new videos to existing lectures (supplementing missing explanations and advanced content)
We will directly address the setup issues, errors, and environment-related problems that have frequently appeared in the Q&A section within the lecture videos. You no longer need to search through the Q&A; simply follow the lectures.
2⃣ Second Update (Scheduled for mid-February)
"Claude Opus 4.6 + Full Integration of Latest Features"
With the recent release of the Claude Opus 4.6 model, Claude has become noticeably smarter. Accordingly, I plan to include the newly added powerful features in the lectures.
Among them, the Agent Teams feature that many of you have been asking about!
It is a feature where multiple Claude Code sessions form a team to collaborate simultaneously, and it is truly powerful.
Since Agent Teams is currently still an experimental feature, I plan to include it in the lecture only after I have spent enough time personally practicing and verifying it through various scenarios. This is because I do not want to convey unverified information.
It will be covered in the second update, so please look forward to it😊
📝 Changelog to be released
We are releasing the Changelog as well.
which videos have been changed and
You can see at a glance which videos have been changed and which new videos have been added.
📅 Update Schedule Announcement
Both updates are scheduled to be completed within February.
Current work in progress:
Identifying and organizing the latest Claude Code specifications
Analyzing existing student Q&A and organizing points for reflection
Exploring various workflows to share with students by personally testing the latest features in different ways.
I will continue to keep students updated on the progress and specific schedule through the news section.
🎊 For those who haven't enrolled yet
If you have been considering the Claude Code course, now is the best time.
Once these two major updates are fully reflected, the course length and quality will be significantly different from what they are now. If you enroll at the current price, you can access all of these updates at no additional cost.
As it happens, a 30% Lunar New Year special discount is currently underway!
🕐 Until ~2/19 (Thu) | Discount ends after | D-7
You can now enroll in the "Claude Code Masterclass" at the lowest price available!
[👉 Enroll at the Lunar New Year Sale Price]
Thank you 🙇♂
Once again, thank you so much for choosing this course and staying with me until the end. I believe these updates are only possible because of all of you.
And if my lecture was even a little bit helpful, I would be grateful if you could write a brief review. Your reviews are a huge source of strength! 💕
Thank you! Best regards, Gym Coding 🙇
