Editing Openai/6897769e-4ee4-800f-aba5-69cca34f701c (section)

==== - Geometry →Gμν\to G_{\mu\nu}→Gμν: The Israel junction route is the precise GR calculus that turns a surface EM energy into a jump in curvature. That’s the missing derivation path. ====
* Spin-2 emergence: The composite effective field and/or second-order boundary response produce a symmetric rank-2 field with the correct gauge structure — the rigorous content QFT demands.
* Time dilation: The optical metric and redshift tie your “exchange rate” clock to standard GR exactly, not just heuristically.

If you want, I can now write the first full worked example: “One spherical shell with steady photon exchange PPP ⇒ compute SabS_{ab}Sab ⇒ Israel jump ⇒ recover Newtonian limit and estimate the size of GR corrections.” That’s a compact derivation we can circulate for independent checking.