Post author here. For any non-trivial app, there would ideally be a set of domain error types/codes that the various application layers know about, rather than

Post author here. For any non-trivial app, there would ideally be a set of domain error types/codes that the various application layers know about, rather than concerning themselves with HTTP statuses. I didn't discuss that in the article, because I felt like it was a bit tangential. Perhaps it was a mistake to omit that detail.