Skip POSIX-only kernel control tests on non-Linux runners

Author: rgarcia

tests/test_harbor_kernel_control.py

@@ -130,6 +130,11 @@ def test_kernel_setup_and_test_scripts_wire_lifecycle(
     assert (env_dir / "harbor" / "browser_runtime_providers.py").is_file()
 
 
+@pytest.mark.skipif(
+    sys.platform != "linux",
+    reason="wrap-harbor-agent.sh runs inside Harbor's Linux containers; "
+    "bash signal handling differs on mac and windows runners",
+)
 def test_stop_wrapper_interrupts_agent_and_exits_cleanly(tmp_path: Path) -> None:
     bin_dir = tmp_path / "bin"
     bin_dir.mkdir()
@@ -364,8 +369,9 @@ def test_start_writes_state_and_credential_free_metadata(
     state = json.loads(module.STATE_FILE.read_text())
     assert state["status"] == "created"
     assert state["cdp_url"].startswith("wss://kernel.example")
-    assert oct(module.STATE_FILE.stat().st_mode & 0o777) == "0o600"
-    assert oct(module.CDP_URL_FILE.stat().st_mode & 0o777) == "0o600"
+    if sys.platform != "win32":
+        assert oct(module.STATE_FILE.stat().st_mode & 0o777) == "0o600"
+        assert oct(module.CDP_URL_FILE.stat().st_mode & 0o777) == "0o600"
 
     metadata = json.loads(module.METADATA_FILE.read_text())
     assert metadata["session_id"] == "sess-123"