Hope this helps!
"ORY Kratos is the first and only cloud native Identity and User Management System in the world."
Uhhh That's not true... Every major cloud provider has one too, and some have had them for over 5+ years.
Also, do Auth0, Okta, etc count?
If every candidate posted their react login code HN would have nothing else!
If it is a spin, the identity system used is a popular open source system which you can find at https://github.com/ory/kratos. The react code is a reference implementation of the same people who wrote that thing, and the article is intended to help people get started with the open source stack. So if you were indeed applying for a job interview, and the task would be to write such an app - you would know where to look. Plus, this would probably reduce the amount of terrible login solutions we have today in the WWW ;)
It looks like it claims to be "cloud native", but what does that actually mean?
Tongue in cheek, but also not.
So do I build my own login screens? If not, do they come out of the box? If so then is it really api only? Where does it fit in with a single page app architecture?
Is there an example of where a real website has used it and I can see how they implemented it? All I see is either too conceptual in the screen cast, or haven’t seen any real websites.
Do I still have to build all the emails for forgot password etc.