Spacetime Displacement Dynamics: Static Weak-Field Correspondence and First Post-Newtonian Structure

Spacetime Displacement Dynamics (SDD) is a research program built around a working hypothesis: localized physical source content changes a physical state of spacetime, and spatial variation of that state may underlie deformation and geometry. The operational weak/static scalar sector used here was defined and normalized previously [1]. The present work asks a narrower follow-on question: how far can that calibrated scalar sector be mapped onto established static weak-field and first-post-Newtonian gravitational structure without disguising imported geometry or closure assumptions as native SDD results? PREPRINT!!! NOT PEER-REVIEWED!!