Make agent validation self-correcting

tests/test_config.py

@@ -35,6 +35,7 @@ def settings(**overrides) -> Settings:
         "poll_seconds": 60,
         "max_changed_files": 12,
         "max_changed_lines": 800,
+        "max_agent_attempts": 2,
         "stale_claim_minutes": 90,
         "dry_run": True,
     }
@@ -61,5 +62,12 @@ def test_default_commands_initialize_disposable_laravel_schema(monkeypatch) -> N
 
     config = Settings.from_env()
 
+    assert "npm ci" in config.test_commands
+    assert "npm run build" in config.test_commands
     assert "php artisan migrate:fresh --force" in config.test_commands
     assert config.test_commands[-1] == "php artisan test"
+
+
+def test_agent_attempts_are_bounded() -> None:
+    with pytest.raises(ValueError, match="MAX_AGENT_ATTEMPTS"):
+        settings(max_agent_attempts=4).validate()