flowchart LR

  classDef invisible fill:none,stroke:none

  subgraph left [" "]
    direction TB

    deployer["deployer<br><font size='1'>has store paths<br>runs nixops4</font>"]
    client["client<br><font size='1'>Selenium scripts</font>"]
  end

  subgraph middle [" "]
    subgraph target_machines["target machines"]
      direction TB

      garage
      mastodon
      peertube
      pixelfed
    end
  end

  subgraph right [" "]
    direction TB

    acme["acme<br><font size='1'>runs Pebble</font>"]
  end

  left ~~~ middle ~~~ right
  class left,middle,right invisible

  deployer -->|deploys| target_machines

  client -->|tests| mastodon
  client -->|tests| peertube
  client -->|tests| pixelfed

  target_machines -->|get certs| acme