diff --git a/src/output/debug.ts b/src/output/debug.ts
index deb832b7..1479d2ea 100644
--- a/src/output/debug.ts
+++ b/src/output/debug.ts
@@ -6,6 +6,7 @@ export type DebugLogger = (message: string, details?: unknown) => void;
 export type DebugSession = {
   log: DebugLogger;
   announcePath: () => void;
+  close: () => void;
 };
 
 export function createDebugLogger(enabled: boolean): DebugSession {
@@ -13,6 +14,7 @@ export function createDebugLogger(enabled: boolean): DebugSession {
     return {
       log: () => {},
       announcePath: () => {},
+      close: () => {},
     };
   }
 
@@ -35,7 +37,7 @@ export function createDebugLogger(enabled: boolean): DebugSession {
     console.error(`[debug] Writing debug log to ./${filename}`);
   };
 
-  return { log, announcePath };
+  return { log, announcePath, close: () => {} };
 }
 
 function formatJson(details: unknown): string {
diff --git a/tests/output.test.ts b/tests/output.test.ts
index 63d8b8b2..76b6f4cf 100644
--- a/tests/output.test.ts
+++ b/tests/output.test.ts
@@ -160,6 +160,11 @@ describe("output formatters", () => {
     }
   });
 
+  it("close is callable for enabled and disabled debug sessions", () => {
+    expect(createDebugLogger(false).close()).toBeUndefined();
+    expect(createDebugLogger(true).close()).toBeUndefined();
+  });
+
   it("formats empty hint lines as empty output", () => {
     expect(formatHintLines([])).toEqual([]);
   });