module/data/Actor/player.mjs

@@ -7,6 +7,11 @@ export class PlayerData extends foundry.abstract.TypeDataModel {
 				trim: true,
 				initial: ``,
 			}),
+			carryCapacity: new fields.NumberField({
+				min: 0,
+				nullable: true,
+				initial: null,
+			}),
 			attr: new fields.TypedObjectField(
 				new fields.SchemaField({
 					name: new fields.StringField({ blank: false, trim: true }),

module/documents/Actor.mjs

@@ -42,7 +42,14 @@ export class TAFActor extends Actor {
 	};
 
 	getRollData() {
-		const data = {};
+		/*
+		All properties assigned during this phase of the roll data prep can potentially
+		be overridden by users creating attributes of the same key, if users shouldn't
+		be able to override, assign the property before the return of this function.
+		*/
+		const data = {
+			carryCapacity: this.system.carryCapacity ?? null,
+		};
 
 		if (`attr` in this.system) {
 			for (const attrID in this.system.attr) {

module/hooks/init.mjs

@@ -5,7 +5,7 @@ import { SingleModePlayerSheet } from "../apps/SingleModePlayerSheet.mjs";
 import { GenericItemSheet } from "../apps/GenericItemSheet.mjs";
 
 // Data Models
-import { PlayerData } from "../data/Player.mjs";
+import { PlayerData } from "../data/Actor/player.mjs";
 import { GenericItemData } from "../data/Item/generic.mjs";
 
 // Documents