phase 1: refactor directory structure (value-objects, factions, characters)

src/factions/Faction.ts

@@ -0,0 +1,28 @@
+/**
+ * Faction value type — a named group that characters can belong to.
+ *
+ * Invariant: faction names are non-empty trimmed strings.
+ */
+export class Faction {
+  #value: string;
+
+  private constructor(value: string) {
+    this.#value = value;
+  }
+
+  static create(value: string): Faction {
+    const trimmed = value.trim();
+    if (trimmed.length === 0) {
+      throw new Error('Faction name cannot be empty');
+    }
+    return new Faction(trimmed);
+  }
+
+  get value(): string {
+    return this.#value;
+  }
+
+  toString(): string {
+    return `Faction(${this.#value})`;
+  }
+}