[CI] Skip worker-dependent SMG e2e tests pending runner-image debug (#24166)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

sgl-model-gateway/e2e_test/fixtures/hooks.py

@@ -233,6 +233,37 @@ def pytest_collection_modifyitems(
     else:
         logger.info("Scanned worker requirements: (none)")
 
+    # TEMPORARY: skip every test that would launch an sglang worker subprocess.
+    #
+    # Workers crash at import inside transformers.integrations.hub_kernels →
+    # kernels.deps with:
+    #   StrictDataclassFieldValidationError: Validation error for field
+    #   'import_name': TypeError: Unsupported type for field 'import_name': str | None
+    #
+    # The package combo (kernels==0.13.0 + huggingface_hub==1.12.2 +
+    # transformers==5.6.0) is NOT the bug — it imports cleanly in fresh
+    # python:3.10-slim and lmsysorg/sglang:dev containers. The crash is specific
+    # to the 4-gpu-a10 runner image (most likely a stale/partial huggingface_hub
+    # install where _BASIC_TYPE_VALIDATORS[types.UnionType] registration is
+    # missing). Remove this skip once the runner image is rebuilt.
+    #
+    # Filter on `model_pool` in fixturenames (covers setup_backend, model_client,
+    # model_base_url, backend_router — all transitively depend on model_pool) so
+    # tests without an explicit `@pytest.mark.e2e` marker are also skipped. Then
+    # clear scanned worker requirements so model_pool — if realized for any
+    # non-skipped fixture — starts empty and never spawns a worker.
+    skip_marker = pytest.mark.skip(
+        reason="worker-dependent tests disabled: SMG runner image crash on transformers.integrations.hub_kernels import"
+    )
+    for item in items:
+        if (
+            item.get_closest_marker("e2e") is not None
+            or "model_pool" in item.fixturenames
+        ):
+            item.add_marker(skip_marker)
+    _worker_counts.clear()
+    _first_seen_order.clear()
+
 
 # ---------------------------------------------------------------------------
 # Pool requirements