Hello, I'm GymCoding!

Harness Engineering is becoming a hot topic, and many people are curious about what exactly it is!

I am currently planning this as an additional lecture.

Harness Engineering is not a new technology. It is a method for systematically designing things you are already using, such as CLAUDE.md, Hooks, and Permissions.

The core point is "change the environment before you change the model." Even with the same Claude, the results vary completely depending on the environment design.

I will be uploading it as an additional lecture soon.

😊 To those currently taking the course

The additional lectures will be provided to existing students at no extra cost.

And if the lecture was helpful, a one-line review would be a huge source of strength. If you haven't left a review yet, I would be grateful if you could leave a short one! 🙏

👉Write a course review

🎯 For those who haven't taken the course yet

Now, we are in an era where the difference in skill is determined not by whether you use AI coding tools, but by how well you use them.

Within just 4 months of its release, more than 5,000 people have taken the course, and a wide range of individuals, including not only developers but also marketers, data analysts, students, and non-developers, are participating.

Recent Reviews

I've taken dozens of courses on Inflearn, but this course was on another level. It's absolutely insane!!
I've watched a few Claude Code-related lectures on YouTube and Inflearn, but this is the first time I've seen a course that covers everything so systematically, from the basics to the latest updates. It was really impressive how it didn't just stop at introducing features but also pointed out why things are used this way. I am confident that it will be of practical help to everyone, from those who know nothing about Vibe Coding to those who already have experience.
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Even though I only applied a part of this course, my development speed and depth have completely changed. It's not just about coding fast; I feel like the level of design itself has improved. I truly felt like I had grown wings.

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To be honest, it's so good that I almost want to keep it to myself, but I still highly recommend it. I will definitely buy Gym Coding's new lectures as soon as they are released. I've already purchased the Next.js and React courses as well. I would be grateful if you continue to create more lectures like this in the future!

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And right now, we are having a 25% discount on all courses to celebrate reaching 5,000 students! This discount is only valid until midnight tonight. Many people contacted me saying they missed the previous discount, so I'm making sure to let you know this time.

👉Enroll now at the discounted price

Thank you! 🙇‍♂