feat(cadfs): expand selector provenance coverage

backend/engine/cdsl_engine/executors/bodies.py

@@ -24,9 +24,11 @@ def _execute_boolean_bodies(node: FeaturePlanNode, session: "ExecutionSession")
     params = node.params
     target_ids = _member_sources(
         node, session, "target_feature_ids", pattern_instance_parameter="target_pattern_instance_refs",
+        allow_transform_copies=True, transform_copy_parameter="target_transform_copy_refs",
     )
     tool_ids = _member_sources(
         node, session, "tool_feature_ids", pattern_instance_parameter="tool_pattern_instance_refs",
+        allow_transform_copies=True, transform_copy_parameter="tool_transform_copy_refs",
     )
     targets = {feature_id: session.body_members[feature_id] for feature_id in target_ids}
     tools = {feature_id: session.body_members[feature_id] for feature_id in tool_ids}
@@ -49,6 +51,12 @@ def _execute_boolean_bodies(node: FeaturePlanNode, session: "ExecutionSession")
     }
     members[node.feature_id] = result
     if bool(params.get("keep_tools")):
+        # In a targetless FeatureScript body-set operation every selected
+        # member is semantically a tool. Lowering chooses the first source
+        # member only to satisfy CDSL's binary executor shape, so retain that
+        # left operand too when the explicit targetless contract requests it.
+        if bool(params.get("targetless_body_set")):
+            members.update(targets)
         members.update(tools)
     session.register_body(
         node.feature_id, _combine_members(session, members), body_members=members, topology_delta=topology_delta,