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! 🙏

👉Write a review

🎯 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 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!

👉Update Discount Link!

💬 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! 🙏

👉Write a Course Review

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👍

👉Check updates

🧑‍🎓 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.

👉Go leave a course review

🙋‍♂ 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

👉View more 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).

👉30% discount application link

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.

→ View Course Reviews

🔥 A special discount is currently available to celebrate the v2.0 update 🔥

→ Discount Application Link: https://gymcoding.co/vip

Thank you.
Best regards, GymCoding

Hello, this is Gym Coding.

I'm sending this final reminder before the deadline just in case you were considering enrolling over the holidays but might have forgotten.

The Lunar New Year 30% discount for "Claude Code Masterclass" completely ends at midnight tonight.

A great number of people have registered during this discount period. With over 2,532 cumulative students and a rating of 4.9 — if you read the reviews, you will see why this course continues to be the top choice.

We have entered an era where not using AI coding tools in the development field is actually a risk. Claude Code is the most powerful among them, and this course covers practical application methods from start to finish.

For your information, we are currently preparing a major update to align with the latest Claude Code specifications.

• "Directly incorporating Q&A from over 2,000 students into the lectures

• "Claude Opus 4.6 + Latest Features (+Agent Teams)

I am sending this final notice as I thought it would be a shame for those interested to miss out during the holiday break. I hope you enjoy the rest of your holiday!

⏰ Deadline: Midnight tonight (Approx. 4 hours left)
💰 Discount: 30%

👉Check it out now: https://inf.run/56t6F

Thank you.

Best regards, Gym Coding

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! 💕

[Go to leave a course review]

Thank you! Best regards, Gym Coding 🙇

Hello, this is Gym Coding!

I'm writing to you today because I wanted to share some very happy news.

The Claude Code Masterclass course released this year has surpassed 1,600 students in just two months. I was told that this kind of growth rate is truly unprecedented, even on Inflearn.

This was only possible thanks to all of you who have taken my previous courses and recommended them to others. I am truly grateful 🙏

So, to express my gratitude, I have prepared a 25% discount event for all Gym Coding courses.

📌Event Information

• Discount Rate: Inflearn's maximum discount rate of 25%

• Period: From today, 2/6 to 2/11

• Target: All GymCoding courses

If you haven't taken Claude Code Perfect Mastery yet, please take this opportunity to check it out.

Recent Course Reviews

It's great because the content ranges from basic to advanced. I also like that it's constantly updated. (View Review)

✅ 1,600+ students enrolled in just 2 months
✅ 4.9 Rating / 135 Reviews
✅ Explore → Plan → Implement → Commit: Complete professional AI development workflow
✅ 23 missions + 3 real-world projects covering MCP, sub-agents, and prompt engineering

As AI development has become the mainstream trend these days, mastering Claude Code alone will significantly transform your development productivity.

If you have previously taken my React, Vue, or Next.js courses, using them together with Claude Code will create incredible synergy.

👉[Link to view all courses]

👉[Link to view the Claude Code course]

A 25% discount is the maximum discount rate applicable on Inflearn. Even if I wanted to lower it further, this is the limit 😅

📢To Claude Code students

Great news for those who are already taking the course! We are preparing two updates today.

1. AI Models vs. AI Coding Tools: What’s the Difference? - Content that clearly explains concepts that beginners often find confusing.

2. Custom Commands & Skills Integration related content -

   We will first provide it as a document and then update it with a video lecture, so please look forward to it 🙌

I will send out an additional announcement when it is updated!

Thank you.

Best regards, Gym Coding

Hello, this is Gym Coding 🙂

Thank you for always seeking out my lectures and for your continued support.

I am writing to you today because I have some special news I would like to share with our current students.

🎯 Claude Code course surpasses 1,000 students just two months after launch!

Over the past two months, a total of 1,292 students have joined us.

I believe it is no coincidence that so many people are showing interest in Claude Code and AI development workflows. In fact, recent statistics support this trend:

• According to a survey of 1,000 global companies by the World Economic Forum (WEF), 86% of companies predict that AI will transform business by 2030.

• According to a survey by the Korea Chamber of Commerce and Industry, 69.2% of domestic companies responded that they consider AI capabilities when hiring.

• 94% of CEOs and HR managers ranked AI as the number one most essential skill for 2025..

AI is no longer an option, but a necessity. We have entered an era where those who effectively utilize AI are the ones who get ahead.

🎁 YouTube Subscriber Discount Coupon Information

I am sharing the current YouTube subscriber discount coupon link for those who have purchased my previous courses but may have missed the discount period.

👉Check Discount Coupon:https://gymcoding.co/vip🔥

🤔 Still undecided?

"Will I fall behind if I don't use AI?"
"Am I the only one who hasn't been able to use it properly yet?"

If you are hesitating about whether this course is right for you while having these thoughts, please check the details below first.

• Inquiries before enrollment:[Link]

• Course Reviews:[Link]

• Lecture Preview Video:[Link]

You can take your time to look through it before making a decision 😊

I am sending this email because several existing students have inquired about discount coupons, and I wanted to make sure others didn't miss out or aren't still waiting for a discount.

Thank you.

Best regards, GymCoding🙏