even more code review

src/wf_core/runtime/ops/nodes.py

@@ -154,10 +154,11 @@ def execute_node_use(
             f"no handler registered for node def {node.node!r}"
         )
 
+    frame = run.current_frame()
     resolved_input, context, state_view = _resolve_node_execution(
         workflow=workflow,
         run=run,
-        frame=run.current_frame(),
+        frame=frame,
         node=node,
         node_def=node_def,
     )
@@ -165,7 +166,7 @@ def execute_node_use(
     return _finalize_node_execution(
         workflow=workflow,
         run=run,
-        frame=run.current_frame(),
+        frame=frame,
         node=node,
         node_def=node_def,
         resolved_input=resolved_input,
@@ -189,10 +190,11 @@ async def execute_node_use_async(
             f"no handler registered for node def {node.node!r}"
         )
 
+    frame = run.current_frame()
     resolved_input, context, state_view = _resolve_node_execution(
         workflow=workflow,
         run=run,
-        frame=run.current_frame(),
+        frame=frame,
         node=node,
         node_def=node_def,
     )
@@ -204,7 +206,7 @@ async def execute_node_use_async(
     return _finalize_node_execution(
         workflow=workflow,
         run=run,
-        frame=run.current_frame(),
+        frame=frame,
         node=node,
         node_def=node_def,
         resolved_input=resolved_input,

src/wf_core/runtime/ops/overlays.py

@@ -30,6 +30,8 @@ def state_view_for_frame(run: RunState, frame: ExecutionFrame) -> dict[str, Any]
     if pending is None:
         return run.state
 
+    # Correctness first: this full copy isolates sibling reads. If state grows
+    # large, replace this with a lazy/copy-on-write overlay.
     state_view = deepcopy(run.state)
     for destination, value in pending.patch.changes.items():
         path = StatePath.parse(destination)