feat: add anemic model detection and refactor hardcoded values (v0.9.0)

packages/guardian/src/domain/services/IAnemicModelDetector.ts

@@ -0,0 +1,29 @@
+import { AnemicModelViolation } from "../value-objects/AnemicModelViolation"
+
+/**
+ * Interface for detecting anemic domain model violations in the codebase
+ *
+ * Anemic domain models are entities that contain only getters/setters
+ * without business logic. This anti-pattern violates Domain-Driven Design
+ * principles and leads to procedural code scattered in services.
+ */
+export interface IAnemicModelDetector {
+    /**
+     * Detects anemic model violations in the given code
+     *
+     * Analyzes classes in domain/entities to identify:
+     * - Classes with only getters and setters (no business logic)
+     * - Classes with public setters (DDD anti-pattern)
+     * - Classes with low method-to-property ratio
+     *
+     * @param code - Source code to analyze
+     * @param filePath - Path to the file being analyzed
+     * @param layer - The architectural layer of the file (domain, application, infrastructure, shared)
+     * @returns Array of detected anemic model violations
+     */
+    detectAnemicModels(
+        code: string,
+        filePath: string,
+        layer: string | undefined,
+    ): AnemicModelViolation[]
+}