Fixes skill calculation.

source/module/actors/M5Character.ts

@@ -123,7 +123,7 @@ export class M5Character extends Actor {
 		ret.stats.poisonResistance = this.modResult(30 + Math.floor(ret.attributes.ko.value / 2))
 		ret.stats.enduranceBonus = Math.floor(ret.attributes.ko.value/10) + Math.floor(ret.attributes.st.value/20)
 
-		if (!skip.mods) {
+		if (!skip?.mods) {
 			const aggregate = new M5ModAggregate(data, ret)
 
 			context.items?.filter(item => item.type === "item").forEach(item => {
@@ -136,9 +136,10 @@ export class M5Character extends Actor {
 			})
 			
 			ret.skillMods = aggregate.calculate()
+			// TODO apply attribute and stat calculation to ret.
 		}
 
-		if (!skip.items) {	
+		if (!skip?.items) {	
 			context.items?.filter(item => item.type === "item").forEach(item => {
 				item.prepareDerivedData()
 
@@ -155,7 +156,7 @@ export class M5Character extends Actor {
 			})
 		}
 
-		if (!skip.skills) {
+		if (!skip?.skills) {
 			context.items?.filter(item => item.type === "skill").forEach(item => {
 				item.prepareDerivedData()
 				const skillMap = ret.skills[item.system.type]
@@ -168,7 +169,7 @@ export class M5Character extends Actor {
 			})
 		}
 
-		if (!skip.weapons) {	
+		if (!skip?.weapons) {	
 			context.items?.filter(item => item.type === "weapon").forEach(item => {
 				item.prepareDerivedData()
 
@@ -190,7 +191,7 @@ export class M5Character extends Actor {
 			})
 		}
 
-		if (!skip.defensiveWeapons) {	
+		if (!skip?.defensiveWeapons) {	
 			context.items?.filter(item => item.type === "defensiveWeapon").forEach(item => {
 				item.prepareDerivedData()
 
@@ -210,7 +211,7 @@ export class M5Character extends Actor {
 			})
 		}
 
-		if (!skip.armor) {	
+		if (!skip?.armor) {	
 			context.items?.filter(item => item.type === "armor").forEach(item => {
 				item.prepareDerivedData()
 
@@ -227,7 +228,7 @@ export class M5Character extends Actor {
 			})
 		}
 
-		if (!skip.spells) {	
+		if (!skip?.spells) {	
 			context.items?.filter(item => item.type === "spell").forEach(item => {
 				item.prepareDerivedData()
 

source/module/items/M5Item.ts

@@ -32,6 +32,7 @@ export class M5Item extends Item {
 				const actorCalc = character.derivedData({ skills: true, weapons: true, defensiveWeapons: true, armor: true, items: true, spells: true })
 				if (actorCalc?.skillMods && Object.keys(actorCalc.skillMods).indexOf(itemId) !== -1) {
 					pairs = pairs.concat(actorCalc.skillMods[itemId])
+				}
 				
 				if (itemData?.attribute && itemData.attribute !== "") {
 					pairs.push({
@@ -45,7 +46,6 @@ export class M5Item extends Item {
 					})
 				}
 			}
-			}
 
 			const res = M5ModAggregate.processPairs(pairs)
 			res.mods.forEach(mod => {

source/module/sheets/M5ItemSheet.ts

@@ -31,11 +31,9 @@ export class M5ItemSheet extends ItemSheet {
 			let actor = this.object?.parent ?? null
 			if (actor) {
 				context.rollData = actor.getRollData()
-			} else {
 			}
 		
-			// Add the actor's data to context.data for easier access, as well as flags.
-			context.system = itemData.system
+			context.data = itemData.system
 			context.flags = itemData.flags
 		
 			return context