건국 관련 추가 구현

packages/logic/src/constraints/misc.ts

@@ -17,3 +17,28 @@ export const notOpeningPart = (relYear: number, openingPartYear: number): Constr
         return { kind: 'deny', reason: '초반 제한 중에는 불가능합니다.' };
     },
 });
+
+export const beOpeningPart = (): Constraint => ({
+    name: 'BeOpeningPart',
+    requires: () => [
+        { kind: 'env', key: 'world' },
+        { kind: 'env', key: 'openingPartYear' },
+    ],
+    test: (_ctx, view) => {
+        const world = view.get({ kind: 'env', key: 'world' }) as { currentYear: number } | null;
+        const openingPartYear = view.get({ kind: 'env', key: 'openingPartYear' }) as number | null;
+        if (!world || openingPartYear === null) {
+            return {
+                kind: 'unknown',
+                missing: [
+                    { kind: 'env', key: 'world' },
+                    { kind: 'env', key: 'openingPartYear' },
+                ],
+            };
+        }
+        if (world.currentYear < openingPartYear) {
+            return allow();
+        }
+        return { kind: 'deny', reason: '초반이 지났습니다.' };
+    },
+});