Late Payload Selection and Modular Supply in Autonomous Source Refresh

The finite supplied recurrence for autonomous source refresh fixes its payloads at the original preparation. We study one payload selected after an accepted second-service readout. An externally prepared canonical donor is attached with four blank packet registers, a blank history, a router, and a paid clock. The packet clock drives a reversible transfer into the receiving register while an autonomous contact coefficient joins the packet to the old source. The contact value and its full first differential vanish throughout loading, so the old trajectory is preserved. The clock momentum stays above its paid branch by an explicit reserve argument and returns to its initial value at admission. A hypothetical originally prepared packet matches the actual loaded service projection at that time; the inherited finite-service theorem then applies under its source-membership and guarded-continuation premises. For preparation, phase, and pulse-area errors at most 2−24 in the stated fixed-shape family, with both desired payload and actual donor norms at most 1/2, the joint donor–receiver defect is at most 9/226. The complete 52-coordinate internal error is below 0.000372 relative to the actual old record and below 0.000553 relative to the propagated second-service reference. All 72 physical coordinates, including the donor residual, are retained. The modeled source import is at most 50,000,001.125. The selected payload becomes the new resident; the processed output is the operation on the old resident. The result concerns one late external supply and one subsequent service. It leaves donor preparation, phase calibration, delivery, attachment, and an output-dependent chooser as external resources.