feat(memory): add operator retrieval plugin (#736)

packages/memory/src/adapters/keyword.test.ts

@@ -274,6 +274,20 @@ describe('KeywordAdapter', () => {
       expect(results).toHaveLength(1);
     });
 
+    it('should return all scoped insights for the explicit wildcard query', async () => {
+      await adapter.storeInsight({
+        userId: 'u1',
+        content: 'A literal * marker is still ordinary content',
+        source: 'chat',
+        category: 'technical',
+        relevanceScore: 0.7,
+      });
+
+      const results = await adapter.searchInsights('u1', '*');
+      expect(results).toHaveLength(4);
+      expect(results.every((result) => result.score === 1)).toBe(true);
+    });
+
     it('should return empty for empty query', async () => {
       const results = await adapter.searchInsights('u1', '   ');
       expect(results).toHaveLength(0);

packages/memory/src/adapters/keyword.ts

@@ -132,19 +132,23 @@ export class KeywordAdapter implements MemoryAdapter {
     opts?: { limit?: number; embedding?: number[] },
   ): Promise<InsightSearchResult[]> {
     const limit = opts?.limit ?? 10;
-    const words = query
-      .toLowerCase()
-      .split(/\s+/)
-      .filter((w) => w.length > 0);
+    const normalizedQuery = query.trim();
+    const matchAll = normalizedQuery === '*';
+    const words = matchAll
+      ? []
+      : normalizedQuery
+          .toLowerCase()
+          .split(/\s+/)
+          .filter((word) => word.length > 0);
 
-    if (words.length === 0) return [];
+    if (words.length === 0 && !matchAll) return [];
 
     const rows = await this.storage.find<InsightRecord>(INSIGHTS, { userId });
 
     const scored: InsightSearchResult[] = [];
     for (const row of rows) {
       const content = row.content.toLowerCase();
-      let score = 0;
+      let score = matchAll ? 1 : 0;
       for (const word of words) {
         if (content.includes(word)) score++;
       }