feat(memory): add experimental qmd search backend

src/config/schema.test.ts

@@ -459,6 +459,9 @@ describe('configSchema — memory injection strategy', () => {
     const result = configSchema.parse(minimalConfig);
     expect(result.memory.injection_strategy).toBe('all');
     expect(result.memory.max_injection_tokens).toBe(2000);
+    expect(result.memory.qmd.enabled).toBe(false);
+    expect(result.memory.qmd.top_k).toBe(8);
+    expect(result.memory.qmd.min_score).toBe(0.15);
   });
 
   it('accepts adaptive memory injection settings', () => {
@@ -472,6 +475,22 @@ describe('configSchema — memory injection strategy', () => {
     expect(result.memory.injection_strategy).toBe('adaptive');
     expect(result.memory.max_injection_tokens).toBe(1200);
   });
+
+  it('accepts qmd backend settings', () => {
+    const result = configSchema.parse({
+      ...minimalConfig,
+      memory: {
+        qmd: {
+          enabled: true,
+          top_k: 12,
+          min_score: 0.2,
+        },
+      },
+    });
+    expect(result.memory.qmd.enabled).toBe(true);
+    expect(result.memory.qmd.top_k).toBe(12);
+    expect(result.memory.qmd.min_score).toBe(0.2);
+  });
 });
 
 describe('configSchema — compaction importance threshold', () => {