flowchart

  user((user)) --> |use| deployment

  configuration1 -->|deploy| deployed1
  maintainers --> |maintain| fediversity

  fediversity --> |update| provider1
  subgraph provider1["fediversity setup A"]
    subgraph configurations1[configurations]
      configuration1[staged configuration]
      configuration1 --> |update| configuration1
      deployed1[deployed configuration]
    end
    deployed1 --> |describe| deployment
    provider-config[runtime config] --> |describe| host
    provider-config --> |implement runtime interfaces| configurations1
    subgraph host[runtime environment]
      deployment[applications]
      state{state}
    end
  end

  deployment --> |store| state

  operator((operator)) --> |change| configuration1

  subgraph provider2["fediversity setup B"]
     subgraph configurations2[configurations]
      configuration2[staged configuration]
      deployed2[deployed configuration]
    end
    subgraph host2[runtime environment]
      deployment2[applications]
      state2{state}
    end
  end

  operator --> |trigger| migration(migration)
  configurations1 & state --> migration
  migration --> configurations2 & state2
  provider((hosting provider)) --> |maintain| provider1
  subgraph fediversity[fediversity source code]
    applications[application modules]
    backends[runtime backends]
    config{{runtime options}}
  end