주기 SSE 검증 하네스 수정

scripts/run-periodic-learner-e2e.py

@@ -44,6 +44,7 @@ FIXTURE_SCRIPT = (
 PERIODIC_SPEC = "e2e/periodic-learner-real-closed-loop.spec.ts"
 RETURNED_SPEC = "e2e/returned-practice-db-closed-loop.spec.ts"
 SCHEMA_VERSION = "vignette.periodic-learner-e2e-receipt.v1"
+PLAYWRIGHT_RETRIES = 0
 FORBIDDEN_PORTS = frozenset({8001, 55432, 9099})
 FORBIDDEN_MARKERS = (
     "vignette.chanpaca.net",
@@ -1243,6 +1244,7 @@ class PeriodicRunner:
                     PERIODIC_SPEC,
                     "--project=chromium-single-run",
                     "--workers=1",
+                    f"--retries={PLAYWRIGHT_RETRIES}",
                     "--reporter=line",
                 ],
                 cwd=web_dir,
@@ -1265,6 +1267,7 @@ class PeriodicRunner:
                     "--project=chromium-desktop",
                     "--project=chromium-mobile",
                     "--workers=1",
+                    f"--retries={PLAYWRIGHT_RETRIES}",
                     "--reporter=line",
                 ],
                 cwd=web_dir,

scripts/test_run_periodic_learner_e2e.py

@@ -26,6 +26,11 @@ def load_module() -> ModuleType:
 runner = load_module()
 
 
+class PeriodicRunnerStaticContractTests(unittest.TestCase):
+    def test_browser_failures_are_not_retried_automatically(self) -> None:
+        self.assertEqual(runner.PLAYWRIGHT_RETRIES, 0)
+
+
 class FakeController:
     def __init__(self, *, tracked_status: str = "") -> None:
         self.tracked_status = tracked_status