Coroutines are tricky, and you need to explain them, not just present a bit of code. I think it is the right decision to omit them from a 15-minute intro. The

Coroutines are tricky, and you need to explain them, not just present a bit of code. I think it is the right decision to omit them from a 15-minute intro. The C API is way out of scope. I would cover assert() statements and the common (exit_status, result) var return, since that is so idiomatic. Maybe also loading chunks.