Resolve PS5 5551 textures with alpha in bit 15 and compose host channel order with guest selectors. Share the existing render-target mapping with sampled textures so packed layouts cannot diverge.
Add native GPU readback coverage for 5551 and 4444, arbitrary selectors, constants, and existing 1555 render-target mapping. Verified PPSA24515 through launch.json with Vulkan validation, advancing scenes and over 12,700 guest flips. Independent correctness and cleanliness audits passed.
nmzik