I'm a big fan of the C4 model [1] for diagramming and documenting software architectures. There is a SaaS tool, Structurizr [2], for diagramming, documenting, a

I'm a big fan of the C4 model [1] for diagramming and documenting software architectures. There is a SaaS tool, Structurizr [2], for diagramming, documenting, and exploring such models, plus also set of PlantUML styles [3] for generating C4 using that tool. [1] https://c4model.com/ https://c4model.com/ [2] https://structurizr.com/ https://structurizr.com/ [3] https://github.com/RicardoNiepel/C4-PlantUML https://github.com/RicardoNiepel/C4-PlantUML