Latest fixes for Oath Hammer

module/models/building.mjs

@@ -0,0 +1,44 @@
+import { SYSTEM } from "../config/system.mjs"
+
+export default class OathHammerBuilding extends foundry.abstract.TypeDataModel {
+  static defineSchema() {
+    const fields = foundry.data.fields
+    const requiredInteger = { required: true, nullable: false, integer: true }
+    const schema = {}
+
+    // Narrative description and special effects
+    schema.description = new fields.HTMLField({ required: true, textSearch: true })
+
+    // Skill required to build (Carpentry or Masonry)
+    schema.skillCheck = new fields.StringField({
+      required: true, initial: "carpentry", choices: SYSTEM.BUILDING_SKILL_CHOICES
+    })
+
+    // Cost in gold pieces (after skill check SV negotiation)
+    schema.cost = new fields.NumberField({ ...requiredInteger, initial: 0, min: 0 })
+
+    // Construction duration (free text: "3 weeks", "6 months", etc.)
+    schema.buildTime = new fields.StringField({ required: true, nullable: false, initial: "" })
+
+    // Monthly tax revenue formula ("3d6", "2d6", "1d3", "" = none)
+    schema.taxRevenue = new fields.StringField({ required: true, nullable: false, initial: "" })
+
+    // Is this building currently constructed in the settlement?
+    schema.constructed = new fields.BooleanField({ required: true, initial: false })
+
+    // Which settlement this building belongs to (free text or settlement name)
+    schema.settlement = new fields.StringField({ required: true, nullable: false, initial: "" })
+
+    // Additional GM notes (special conditions, upgrades, damage, etc.)
+    schema.notes = new fields.HTMLField({ required: false, textSearch: true })
+
+    return schema
+  }
+
+  static LOCALIZATION_PREFIXES = ["OATHHAMMER.Building"]
+
+  /** Returns true if this building generates tax income */
+  get hasTaxRevenue() {
+    return this.taxRevenue.trim().length > 0
+  }
+}