It’s good to see something like this that can help people get success with Phoenix quickly and also having the tutorials/course aspect to it.

If it was just a kitchen sink starter kit with everything pre-baked then I would have reservations but it is a modular course with working code that you can add as you go.

I have also read quite a few of your articles in the past which has been useful so I am inclined to believe that your kit would be quite good also.

I would personally make some different choices for UI components, I looked at flowbite but they need alpine.js and their markup is not semantically clean, and colours are embedded into the markup.

I much prefer the daisyUI approach with semantically correct html, tighter html with fewer classes and a separation of the colours/theme from the markup. It is also CSS only with no need for alpine.js.

With Ueberauth I would avoid given how they handle configuration being compile time which makes multi tenant customers with runtime configurable auth providers a difficult proposition. IMO Assent is the better pick here.

I also base my apps on the Ash framework domain modelling approach, which provides comprehensive features for access policies, API and a ton of other things with far less test drudgery required because so much is derived in the framework. I would suggest an Ash flavoured kit might also be something to consider in a future product variant

All that said, having a functioning reference implementation with a course guide is still very useful.

Well done!