fix(memory-qmd): restore qmd compatibility defaults

src/memory-host-sdk/host/qmd-query-parser.test.ts

@@ -40,6 +40,18 @@ complete`,
     ]);
   });
 
+  it("maps single-line qmd line metadata onto both line bounds", () => {
+    const results = parseQmdQueryJson('[{"docid":"abc","score":0.5,"line":9}]', "");
+    expect(results).toEqual([
+      {
+        docid: "abc",
+        score: 0.5,
+        startLine: 9,
+        endLine: 9,
+      },
+    ]);
+  });
+
   it("treats plain-text no-results from stderr as an empty result set", () => {
     const results = parseQmdQueryJson("", "No results found\n");
     expect(results).toEqual([]);

src/memory-host-sdk/host/qmd-query-parser.ts

@@ -89,6 +89,9 @@ function parseQmdQueryResultArray(raw: string): QmdQueryResult[] | null {
       const file = typeof record.file === "string" ? record.file : undefined;
       const snippet = typeof record.snippet === "string" ? record.snippet : undefined;
       const body = typeof record.body === "string" ? record.body : undefined;
+      const line = parseQmdLineNumber(record.line);
+      const startLine = parseQmdLineNumber(record.start_line ?? record.startLine) ?? line;
+      const endLine = parseQmdLineNumber(record.end_line ?? record.endLine) ?? line;
       return {
         docid,
         score,
@@ -96,8 +99,8 @@ function parseQmdQueryResultArray(raw: string): QmdQueryResult[] | null {
         file,
         snippet,
         body,
-        startLine: parseQmdLineNumber(record.start_line ?? record.startLine),
-        endLine: parseQmdLineNumber(record.end_line ?? record.endLine),
+        startLine,
+        endLine,
       } as QmdQueryResult;
     });
   } catch {