chore: import upstream snapshot with attribution

python/semantic_kernel/processes/kernel_process/kernel_process_step.py

@@ -0,0 +1,23 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+from abc import ABC
+from typing import TYPE_CHECKING, Generic, TypeVar
+
+from semantic_kernel.kernel_pydantic import KernelBaseModel
+from semantic_kernel.utils.feature_stage_decorator import experimental
+
+if TYPE_CHECKING:
+    from semantic_kernel.processes.kernel_process.kernel_process_step_state import KernelProcessStepState
+
+TState = TypeVar("TState")
+
+
+@experimental
+class KernelProcessStep(ABC, KernelBaseModel, Generic[TState]):
+    """A KernelProcessStep Base class for process steps."""
+
+    state: TState | None = None
+
+    async def activate(self, state: "KernelProcessStepState[TState]"):
+        """Activates the step and sets the state."""
+        pass  # pragma: no cover