feat(memory): define MemoryAdapter interface types

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/memory/src/index.ts

@@ -13,3 +13,10 @@ export {
   type SearchResult,
 } from './insights.js';
 export type { VectorStore, VectorSearchResult, EmbeddingProvider } from './vector-store.js';
+export type {
+  MemoryAdapter,
+  MemoryConfig,
+  NewInsight as AdapterNewInsight,
+  Insight as AdapterInsight,
+  InsightSearchResult,
+} from './types.js';

packages/memory/src/types.ts

@@ -0,0 +1,72 @@
+export type { EmbeddingProvider, VectorSearchResult } from './vector-store.js';
+import type { EmbeddingProvider } from './vector-store.js';
+
+/* ------------------------------------------------------------------ */
+/*  Insight types (adapter-level, decoupled from Drizzle schema)      */
+/* ------------------------------------------------------------------ */
+
+export interface NewInsight {
+  userId: string;
+  content: string;
+  source: string;
+  category: string;
+  relevanceScore: number;
+  metadata?: Record<string, unknown>;
+  embedding?: number[];
+}
+
+export interface Insight extends NewInsight {
+  id: string;
+  createdAt: Date;
+  updatedAt?: Date;
+  decayedAt?: Date;
+}
+
+export interface InsightSearchResult {
+  id: string;
+  content: string;
+  score: number;
+  metadata?: Record<string, unknown>;
+}
+
+/* ------------------------------------------------------------------ */
+/*  MemoryAdapter interface                                           */
+/* ------------------------------------------------------------------ */
+
+export interface MemoryAdapter {
+  readonly name: string;
+
+  // Preferences
+  getPreference(userId: string, key: string): Promise<unknown | null>;
+  setPreference(userId: string, key: string, value: unknown, category?: string): Promise<void>;
+  deletePreference(userId: string, key: string): Promise<boolean>;
+  listPreferences(
+    userId: string,
+    category?: string,
+  ): Promise<Array<{ key: string; value: unknown; category: string }>>;
+
+  // Insights
+  storeInsight(insight: NewInsight): Promise<Insight>;
+  getInsight(id: string): Promise<Insight | null>;
+  searchInsights(
+    userId: string,
+    query: string,
+    opts?: { limit?: number; embedding?: number[] },
+  ): Promise<InsightSearchResult[]>;
+  deleteInsight(id: string): Promise<boolean>;
+
+  // Embedding
+  readonly embedder: EmbeddingProvider | null;
+
+  // Lifecycle
+  close(): Promise<void>;
+}
+
+/* ------------------------------------------------------------------ */
+/*  MemoryConfig                                                      */
+/* ------------------------------------------------------------------ */
+
+export type MemoryConfig =
+  | { type: 'pgvector'; embedder?: EmbeddingProvider }
+  | { type: 'sqlite-vec'; embedder?: EmbeddingProvider }
+  | { type: 'keyword' };