chore: initial release

lib/core/models/knowledge_base.dart

@@ -0,0 +1,35 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'knowledge_base.freezed.dart';
+part 'knowledge_base.g.dart';
+
+@freezed
+sealed class KnowledgeBase with _$KnowledgeBase {
+  const factory KnowledgeBase({
+    required String id,
+    required String name,
+    String? description,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+    @Default(0) int itemCount,
+    @Default({}) Map<String, dynamic> metadata,
+  }) = _KnowledgeBase;
+
+  factory KnowledgeBase.fromJson(Map<String, dynamic> json) =>
+      _$KnowledgeBaseFromJson(json);
+}
+
+@freezed
+sealed class KnowledgeBaseItem with _$KnowledgeBaseItem {
+  const factory KnowledgeBaseItem({
+    required String id,
+    required String content,
+    String? title,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+    @Default({}) Map<String, dynamic> metadata,
+  }) = _KnowledgeBaseItem;
+
+  factory KnowledgeBaseItem.fromJson(Map<String, dynamic> json) =>
+      _$KnowledgeBaseItemFromJson(json);
+}