Retry incomplete agent repairs safely

tests/test_worker.py

@@ -97,3 +97,45 @@ def test_failed_validation_gets_one_correction_before_pr() -> None:
     assert worker._run_tests.call_count == 2
     workspace.push_branch.assert_called_once()
     worker.reports.complete.assert_called_once()
+
+
+def test_no_change_response_gets_one_correction() -> None:
+    report = FailureReport(
+        id=14,
+        chat_message_id=1,
+        source="automatic",
+        category="sql_execution",
+        user_feedback=None,
+        feedback_type=None,
+        expected_behavior=None,
+        prompt="List products",
+        response=None,
+        sql_query=None,
+        error_message="Unknown column",
+        context={},
+    )
+    config = settings(mode="pr", dry_run=False, gitea_token="token")
+    worker = AutomationWorker(config)
+    worker.reports = Mock()
+    worker.reports.claim_next.return_value = report
+    worker.agent = Mock()
+    worker.agent.run.side_effect = ["no edit", "applied edit"]
+    worker.gitea = Mock()
+    worker._run_tests = Mock(return_value=[])
+    workspace = Mock()
+    workspace.path = Path("/tmp/nonexistent-workspace")
+    workspace.branch = "ai/failure-14"
+    workspace.summary.side_effect = [
+        ChangeSummary((), 0, 0),
+        ChangeSummary(("tests/Feature/FixTest.php",), 5, 0),
+        ChangeSummary(("tests/Feature/FixTest.php",), 5, 0),
+    ]
+    workspace.commit.return_value = "commit-id"
+
+    with patch("lai_automation.worker.GitWorkspace", return_value=workspace):
+        assert worker.run_once()
+
+    assert worker.agent.run.call_count == 2
+    assert "No file changes" in worker.agent.run.call_args_list[1].args[1]
+    worker._run_tests.assert_called_once()
+    workspace.push_branch.assert_called_once()