A Set of Patterns as a Set of Directories

What does it look like to combine these patterns: domain-driven design, test-driven development, and event-driven microservices?

First two first. Design precedes development. Design and development of what? Services. So then, what does domain-driven design look like? It looks like commits within domain/ before commits within services/. And then, what does test-driven development look like? It looks like commits within tests/ before commits within services/. All together now: combining domain-driven design and test-driven development looks like commits first within domain/, followed by commits within tests/, followed by commits within services/.

And then what does it look like to fold in the pattern of event-driven microservices? It looks like commits within domain/events[.py|/] before commits within services/, and it looks like content (so maybe you don’t need new commits each time you add domain events) within endpoints/ to ensure that all services are independently addressable and accessible outside of a service(s)-plus-endpoint(s) host process. That is, the “micro” part looks like external processes being able to invoke services à la carte.