Handoff toward X-D-ST

A successor receives:

1. the same supported host and fixed-width prescription;

2. the two new maps with their actual insertion domain, support, continuity, and separate normalizations;

3. the completed test $e[q]$, counted as in (eq:fourterms);

4. the background identity through ${\kappa }^2$;

5. the full three-term variation and propagated edge formula;

6. the diagnostics and the statement that no time-ordered family was used.

It receives no sharp-width limit, no uniform $\epsilon$-dependent estimate, no quantum metric, and no product hierarchy. A later scalar prescription must not add $\int f{\rho }_{2,g}$ again after including the two maps that already represent it.