Solve Claude Code in One Go—Even Beginners Can Follow Along, Taught Directly by the Author of *Claude Code Master*

Hello, this is Villain.

There are two things to share.

Learning Materials Update Notice

At the request of today’s students, the mobile version of the presentation materials has been uploaded to Chapter 2 of each Level (Chapter 1 is a public video, so there are no lecture materials). I’ve added the label "Class Materials Update" to the title.

Among the course-related content, the knowledge needed for development is available at https://run-ai.kr/tutorial?tab=learn

Through the link, you can learn how to use VSCode, Git, and Terminal, as well as database design methods, SQL basics, skills, MCP, and hooks.

Fable 5.1 prompt guides and other materials have been uploaded, so we recommend using the documents to study whenever you have the time.

Seminar Announcement

Additionally, on September 11 (Friday) at 7:00 PM, we will be holding a seminar at Hanbit Media in Hongdae on [Harness Engineering and Evaluator Control]. For more details, please check the link below.

https://event-us.kr/FKH3nHkjmPGh/event/131554

Inflearn students can still participate in the course review event, and there are five spots remaining, so you can attend for free. Please refer to the course review event on the course introduction page and send us an email, and we will send you an invitation email with further instructions.

Thank you.

Hello, this is Villain.

We are holding a September event for students as outlined below, so those who are interested, please take note.

Seminar Information

On Friday, September 11 at 7 p.m., we will hold a seminar with Hanbit Media on the topic of “From vibe coding to verified coding ~ Harness Engineering and Evaluator Control.”

https://event-us.kr/FKH3nHkjmPGh/event/131554
You can find more details and register through the link above.

Course Completion and Discount Event Announcement

Additionally, all lectures for the “Master Claude Code in One Go, Even for Beginner Developers” course have been uploaded as of today.

https://inf.run/yREen

To celebrate the completion of the course, a 25% discount event is underway. We’re also running an event offering free seminar invitations (worth 20,000 won) to students who leave a course review.

Please take care not to catch a cold during this change of seasons.

Have a happy September.

Thank you.

Hello. This is Villain.

Today, the first part of the Level 5 practice project has been completed and uploaded.

Starting from next week, I plan to sequentially update features such as deploying to Vercel, Google OAuth login integration, Email Verification via Resend API, and image/file upload functionality integrated with Cloudflare R2.

The course will be completed after the final stage of connecting a custom domain to finalize build/deployment automation and building your own service, but I will strive to continuously update it with new features.

Thank you for taking my course.

Hello. This is Villain.

Part 3 of the Level 5 practice project was uploaded today.

The project wrap-up video is scheduled to be uploaded on Tuesday (August 11th), and

The full set of videos for Level 5 will be completed once the design system and debugging videos are uploaded around the weekend.

I will do my best to open it as soon as possible.

Thank you for taking my course.

Hello. This is Villain.

Following yesterday, half of the 8 practice sections for the Level 5 lecture have been uploaded as of today.

Due to an issue where Claude Code slowed down slightly last weekend, video production didn't go as smoothly as expected and took longer than planned; however, I will do my best to ensure that the Level 5 lectures are all completed this weekend.

In addition, for the August event, we plan to give away invitation tickets to a seminar taking place next month.

• If you leave a course review, we will send invitations to the seminar on September 11th (Friday) to the first ten students on a first-come, first-served basis.

• It starts at 7 PM at Hanbit Media Leaders Hall near Hongik University Station.

• Please leave a course review and send your seminar application information (contact details, name) to my email (villainscode@gmail).

Please refer to the following image and text for the seminar topic.

1) Date and Time: Friday, September 11, 2026, 7:00 PM– (Entry available from 6:30 PM)

2) Lecture Content (Subject to change depending on the situation on the day.)

① Why 'Vibe Coding' hits a limit — The risks of coding by intuition

② What is a Coding Agent Harness? — The structure of context, tools, and guardrails

③ Harness Engineering in Practice: Turning Claude Code into a Controllable Workflow

④ Evaluator Design: Measuring Agent Responses with 'Metrics' Instead of 'Feelings'

⑤ Asking the right questions and evaluating properly — Designing prompts and Evals together

We will be sending free admission tickets (worth 20,000 KRW) to ten people who leave a course review, so we look forward to your participation.

Thank you.

Hello. This is Villain.

The theory part of the "Level 5 - Practical Workflow Not Found in Books" lecture has been uploaded today.

The practical part will be uploaded sequentially by August 2nd.

Please refer to this while taking the course.

Please feel free to contact us anytime if you have any questions.

Thank you.

Hello. This is Code Villain.

In collaboration with Hanbit Media, we are holding an opening event for the Inflearn course Solving Claude Code in One Go for Beginners.

We have prepared Inflearn course discount coupons for those who have purchased or are planning to purchase the book "Claude Code Master."

If you purchase a new book during the event period, you will receive a 40% discount coupon (96,800 KRW → 58,000 KRW), and if you already own the book, you will receive a 20% discount coupon (96,800 KRW → 77,400 KRW).

It is not a lucky draw, but will be given to all participants who verify.

• Target Lecture: Solving Claude Code in One Go for Beginners

• Event Period: 2026. 07. 20(Mon) ~ 08. 17(Sun)

• How to participate: Purchase the book (including existing owners) → Verify purchase via Google Form → Coupon issued after confirmation

• Lecture Link: https://inf.run/yREen

• Application Form: https://docs.google.com/forms/d/e/1FAIpQLSfDEqxKOx-VtJAjL7KP8V1jG_hVFcz65HVAHCxn4e7tqu5zpg/viewform

Since the content of the book and the lecture are different, I believe it will be helpful for those who wish to learn Claude code.

We appreciate your interest.
Thank you.

Hello. This is Villain.

All of the Level 4 hands-on lectures for the "Creating and Using Your Own Commands, Skills, and Hooks" project have been uploaded today.

The post-class mission is to receive notifications by integrating tools like Telegram and Slack.

We are planning a mission completion event after the conclusion of Lecture 5.

We will work with Hanbit Media to create meaningful events and strive to provide various benefits to our students.

The next Level 5 lectures will be uploaded sequentially starting July 26th for the theory portion, and the practical projects are scheduled to be uploaded in order starting August 2nd.

Thank you.