A.3:5.3 - Boundary & externality
A.3.4 first identifies the actual bounded change from its changed referent and subject-side occurrence facts. Add an asymmetric acting side and target side only when a direct participation, interaction, causality, or work owner independently grounds that factorization. If an exact interaction relation obtains, cite its direct governing pattern; A.3 does not create one from the word “transformation.”
Natural, spontaneous, and formal transformations can therefore remain actual without an invented performer. Joint dynamics, relational change, or a non-separable or frame-dependent participation case also remains under its direct dynamics, relation, interaction, or causality owner until an asymmetric actor–target split is justified. Ordinary coupling and scale-free or minimal physical agentivity alone establish neither TransformerRole@Context, U.Method, nor a dated Work occurrence admitted under U.Work.
For work on oneself, use the A.12 reflexive split only after two distinct internal positions are grounded for the current claim. The acting and changed positions may be subholons inside one containing holon; selecting those already grounded parts is an A.14/C.13 structure move, not a Meta-Holon Transition. Use B.2 only if the whole itself is reidentified.