Common mistakes

None of these raise an error. All of them give you a rule that looks right and does nothing.

Reading a stat by display name. $.stat('brawn') breaks when the stat is renamed, and a missing stat reads 0, so the rule keeps running on a wrong number. Use the role: $.stat('might'). → Reading values

Treating a missing field as 0. It's null, and null fails every comparison, < included. infection < 5 matches nobody who lacks the field. → Missing values

$.player when you meant everyone. $.player is the host only. Use $.party.

Charging per hour off $.event.minutes in a clockless game. Those minutes are the narrator's guess; wordy turns cost seven times more. → Minutes are not time

refuse where you meant veto. refuse stops the player's action; veto stops another plugin's event. → Steps

A dial copied as a number. Right until someone retunes the dial. → Formulas and dials

$.damage with a zero dial. Damage floors at 1. Check the dial first. → Steps

Reading a different place than you wrote. Settings filled into a table, hook reads $.location.fields. → Reading values

Numbers in narration. $.narrate('fever reduced by 2') breaks the voice. Write the sentence a player should read. → Steps

optional used as a fork. An unfinished optional quest step blocks the quest. Use skipIf. → Quests

Rolling dice in a condition. $.random() returns null outside a rule body. → Expressions