I tried to apply Harness in practice but failed every time and only wasted time, so this was the first time I realized it needs to be built so systematically. In particular, I didn't know when to use things like agent skills or hooks and even asked AI to write those features for me, but now that I know their purpose and how to use them, I think I'll be able to utilize them much better.

Overall, I was satisfied with the explanation of the core concepts and theories in the lecture. However, one disappointing point was the lack of specific, high-level examples that could be directly applied to a real-world production environment. I think it would be a much more beneficial course if cases or exercises focused on "practical application" were further reinforced.

The lecture quality is not satisfactory.

GREAT!

Thank you for creating the course. It was great to get a taste of the architecture of various services. The content is good for beginners who are new to system design. Overall, the only downside seems to be the delivery. The delivery and editing were not smooth, making it difficult to concentrate. It would be good to cut out unnecessary parts through editing. I hope you continue to create good content in the future. updated: I thought the first two sections were fine. The schema and OOP system design parts were a bit lacking. It would have been helpful to show the overall interview picture or outline before starting and say, "It's good to talk to or ask the interviewer about these points here." Still, I'm very grateful that you seem to be constantly revising the course :)