nEngine/content/statemachines/chicken-egg.yaml

# Example state machine (D15/D20 behavior language v2) — decision #9's
# "produce rules via language". The engine emits animal-produce per eligible day
# for a mature (final-stage) chicken; this machine turns that EVENT into an egg
# grant via a give-item onEnter. The machine alternates on successive
# animal-produce events (one transition per machine per event), so the egg is
# granted on every second produce — frequency/quantity are exactly the kind of
# rule the language (not the engine) owns.
id: chicken-egg
initial: waiting
states:
  - id: waiting
  - id: laid
    onEnter:
      - action: give-item
        itemId: egg
        qty: 1
transitions:
  - from: waiting
    to: laid
    on: animal-produce
    when:
      op: eq
      path: payload.animalDefId
      value: chicken
  - from: laid
    to: waiting
    on: animal-produce
    when:
      op: eq
      path: payload.animalDefId
      value: chicken