diff --git a/packages/engine/src/__tests__/executor-task-done-invariant.test.ts b/packages/engine/src/__tests__/executor-task-done-invariant.test.ts
index 7088c41f05..a939af9e56 100644
--- a/packages/engine/src/__tests__/executor-task-done-invariant.test.ts
+++ b/packages/engine/src/__tests__/executor-task-done-invariant.test.ts
@@ -206,6 +206,23 @@ describe("FN-4114 fn_task_done invariants", () => {
     expect(result.content[0].text).toContain("fn_task_done refused: wrong_branch");
     expect(store.moveTask).toHaveBeenCalledWith("FN-4114", "todo", { preserveProgress: true });
   });
+  it("FN-4114 allows no-commit completion when noCommitsExpected audit logging fails", async () => {
+    const { store, tool } = await setup({ noCommitsExpected: true });
+    mockedExecSync.mockImplementation((cmd: string) => {
+      if (cmd.includes("rev-parse --show-toplevel")) return Buffer.from("/repo/.worktrees/swift-falcon\n");
+      if (cmd.includes("rev-parse --abbrev-ref HEAD")) return Buffer.from("fusion/fn-4114\n");
+      if (cmd.includes("rev-list --count")) return Buffer.from("0\n");
+      if (cmd.includes("rev-parse HEAD")) return Buffer.from("def456\n");
+      return Buffer.from("");
+    });
+    store.logEntry.mockImplementation(async (_id: string, message: string) => {
+      if (message.includes("no_commits guard skipped")) throw new Error("audit unavailable");
+    });
+
+    const result = await tool.execute("id", {});
+    expect(result.content[0].text).toContain("Task marked complete");
+    expect(store.updateStep).toHaveBeenCalled();
+  });
 
 
   it("FN-416 allows plan-only operational no-source completion with zero commits when the explicit flag is missing", async () => {
diff --git a/packages/engine/src/executor.ts b/packages/engine/src/executor.ts
index 56ecd1895f..00dc22c2b7 100644
--- a/packages/engine/src/executor.ts
+++ b/packages/engine/src/executor.ts
@@ -9530,12 +9530,18 @@ export class TaskExecutor {
       : evaluatePromptDerivedNoCommitEligibility(task, typeof promptContent === "string" ? promptContent : "");
     if (noCommitEligibility.eligible) {
       executorLog.log(`${task.id}: fn_task_done no_commits guard skipped (${noCommitEligibility.reason})`);
-      await this.store.logEntry(
-        task.id,
-        `fn_task_done no_commits guard skipped (${noCommitEligibility.reason})`,
-        undefined,
-        this.getRunContextFor(task.id),
-      );
+      try {
+        await this.store.logEntry(
+          task.id,
+          `fn_task_done no_commits guard skipped (${noCommitEligibility.reason})`,
+          undefined,
+          this.getRunContextFor(task.id),
+        );
+      } catch (error) {
+        executorLog.warn(
+          `${task.id}: failed to write no_commits guard skip audit log: ${error instanceof Error ? error.message : String(error)}`,
+        );
+      }
       return { ok: true };
     }