T001–T006: Phase 1 setup (workspace, Biome, TS, Vitest, layer boundary enforcement)

packages/domain/src/__tests__/layer-boundaries.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from "vitest";
+import { checkLayerBoundaries } from "../../../../scripts/check-layer-boundaries.mjs";
+
+describe("layer boundaries", () => {
+	it("domain and application packages have no forbidden imports", () => {
+		const violations = checkLayerBoundaries();
+		if (violations.length > 0) {
+			const messages = violations.map(
+				(v) =>
+					`${v.file}:${v.line} imports "${v.importPath}" (forbidden: ${v.forbidden})`,
+			);
+			throw new Error(`Layer boundary violations:\n  ${messages.join("\n  ")}`);
+		}
+		expect(violations).toHaveLength(0);
+	});
+});