Skill Tree

      flowchart LR
        subgraph Skills
          direction LR

          subgraph Digging
            direction LR

            dig1[Hard Digging]
            dig2[Superhard Digging]
            dig3[Super-Duperhard Digging]
            dig4[Haxmat Digging]

            dig1-->dig2-->dig3-->dig4
          end

          subgraph Building
            direction LR

            build1[Improved Construction I]
            build2[Improved Construction II]
            build3[Demolition]

            build1-->build2-->build3
          end

          subgraph Farming
            farm1[Improved Farming I]
            farm2[Crop Tending]
            farm3[Improved Farming II]

            farm1-->farm2-->farm3
          end

          subgraph Ranching
            ranch1[Critter Ranching I]
            ranch2[Critter Ranching II]

            ranch1-->ranch2
          end

          subgraph Cooking
            direction LR

            cook1[Grilling]
            cook2[Grilling II]

            cook1-->cook2
          end

          subgraph Decorating
            direction LR

            art1[Art Fundamentals]
            art2[Aesthetic Design]
            art3[Masterworks]

            art1-->art2-->art3
          end

          subgraph Research
            research1[Advanced Research]
            research2[Field Science]
            research3[Applied Sciences Research]
            research4[Astronomy]
            research5[Data Analysis Researcher]

            research1-->research2-->research3
            research1-->research4-->research5
          end

          subgraph Rocketry
            rocketry1[Rocket Piloting]
            rocketry2[Rocket Piloting II]

            rocketry1-->rocketry2
          end

          subgraph Suit Wearing
            suit1[Suit Sustainability Training]
            suit2[Exosuit Training]

            suit1-->suit2
          end

          subgraph Supplying
            supplying1[Improved Carrying I]
            supplying2[Improved Carrying II]

            supplying1-->supplying2
          end

          subgraph Operating
            operating1[Improved Tinkering]
            operating2[Electrical Engineering]
            operating3[Mechatronics Engineering]

            operating1-->operating2-->operating3
          end

          subgraph Doctoring
            direction LR

            doctoring1[Medicine Compounding]
            doctoring2[Bedside Manner]
            doctoring3[Advanced Medical Care]

            doctoring1-->doctoring2-->doctoring3
          end

          subgraph Tidying
            direction LR

            tidying1[Improved Strength]
            tidying2[Plumbing]
            tidying3[Pyrotechnics]

            tidying1-->tidying2-->tidying3
          end

          farm1-->ranch1
          research4-->rocketry2
          suit1-->rocketry1
          supplying1-->rocketry1
          supplying2-->operating3

          Building<-.->operating3
          Supplying<-.->Tidying
        end