Prompt alignment is an architectural ceiling: The Soap Bubble Problem and the biological precedent for Runtime Governance.

The Soap Bubble Problem The current paradigm of solving agentic alignment relies on writing better rules into the context window or refining the weights (RLHF). This approach isn't failing, but it is hitting a hard architectural ceiling. Trying to align an agent solely through its prompt or weights is like trying to teach a soap film how to hold a complex shape by giving it instructions. A soap film doesn't hold a predictable structure because it "wants" to; it forms a stable shape automatically only when constrained by a rigid, physical frame.