Refactoring

lib/domain/repositories/note_repository.dart

@@ -0,0 +1,21 @@
+/// Persistence interface for the trainer's knowledge base.
+///
+/// The implementation splits raw text into chunks, generates embeddings
+/// via the Nomic server, stores them in the local database, and provides
+/// semantic search for RAG context injection.
+abstract class NoteRepository {
+  /// Splits [text] into overlapping chunks, generates an embedding for each,
+  /// and persists them under a shared [sourceId].
+  Future<void> addNote(String text);
+
+  /// Returns the [topK] most semantically similar chunk texts for [query].
+  /// Returns an empty list if no chunks are stored or the embedding server
+  /// is unavailable.
+  Future<List<String>> searchSimilar(String query, {int topK = 3});
+
+  /// Returns the total number of stored chunks.
+  Future<int> getChunkCount();
+
+  /// Deletes every stored chunk (full knowledge-base reset).
+  Future<void> clearAll();
+}