Harden golden QA readiness gate

backend/tests/test_sprint12_golden_qa_benchmark.py

@@ -55,3 +55,20 @@ def test_golden_qa_benchmark_command_passes_and_reports_persistence() -> None:
         "precision",
         "recall",
     ]
+
+
+def test_golden_qa_shell_wrapper_is_safe_and_documented() -> None:
+    script = ROOT / "scripts" / "verify_golden_qa_benchmark.sh"
+    content = script.read_text(encoding="utf-8")
+
+    assert "set -euo pipefail" in content
+    assert "run_golden_qa_benchmark.py --json" in content
+
+    result = subprocess.run(
+        ["bash", "-n", "scripts/verify_golden_qa_benchmark.sh"],
+        cwd=ROOT,
+        check=True,
+        text=True,
+        capture_output=True,
+    )
+    assert result.returncode == 0