feat: retry failed agent validations

tests/test_worker.py

@@ -175,6 +175,50 @@ def test_agent_failure_details_identify_step_limit(settings) -> None:
     assert "issue-43.traj.json" in details
 
 
+@patch("lai_automation.worker.GitWorkspace")
+def test_failed_validation_is_given_to_repair_attempt(
+    GitWorkspace,
+    settings,
+) -> None:
+    settings = settings.__class__(
+        **{**settings.__dict__, "max_agent_attempts": 2}
+    )
+    issue = queued_issue()
+    running = Issue(**{**issue.__dict__, "labels": (Label(2, "ai:running"),)})
+    gitea = Mock()
+    gitea.get_issue.return_value = issue
+    gitea.set_automation_state.side_effect = [running, running]
+    gitea.create_pull_request.return_value = PullRequest(
+        18,
+        "https://gitea.example.test/owner/lai/pulls/18",
+    )
+    agent = Mock()
+    agent.run.side_effect = [
+        AgentResult("Submitted", "First", 4, 0.2),
+        AgentResult("Submitted", "Repaired", 2, 0.1),
+    ]
+    workspace = GitWorkspace.return_value
+    workspace.path = settings.workspace_root / "issue-7" / "repo"
+    workspace.branch = "ai/issue-7"
+    workspace.summary.return_value = ChangeSummary(("app/Fix.php",), 2, 0)
+    workspace.normalize_changed_whitespace.return_value = ()
+    workspace.has_symlink.return_value = False
+    workspace.has_path.return_value = False
+    workspace.run_trusted.side_effect = [
+        Mock(),
+        RuntimeError("PHP parse error on line 3"),
+        Mock(),
+    ]
+    workspace.commit.return_value = "abc123"
+
+    Worker(settings, gitea, agent).process(issue, labels())
+
+    assert agent.run.call_count == 2
+    assert "PHP parse error on line 3" in agent.run.call_args_list[1].args[3]
+    workspace.push.assert_called_once()
+    assert gitea.set_automation_state.call_args_list[-1].args[1] == "ai:ready"
+
+
 @patch("lai_automation.worker.GitWorkspace")
 def test_preflight_runs_setup_and_tests_without_model(
     GitWorkspace,