Activity diagram

examples/activity-diagram.puml
@startuml

!include https://raw.githubusercontent.com/attilasomogyi/plantuml-settings/main/src/plantuml-settings.puml

start

if (Graphviz installed?) then (yes)
  :process all
  diagrams;
else (no)
  :process only
  sequence and activity diagrams;
endif

stop

@enduml
Activity diagram