Simon Brown -inventor of the C4 model – recently came up with a checklist about diagrams and notations.

A few people have asked me for this recently so … if you’re looking for my software architecture diagram notation checklist, you can find it here…

Although it seems obvious what is checked in this list, almost every single diagram I have encountered in my career did not provide all the information. Copy it, print it, as an architect (and software developer) carry it with you – and use it.

Link: https://c4model.com/assets/software-architecture-diagram-review-checklist.pdf