# 490d Mirror checkpoint after C307

24 September 2026. Latest completed: **C307 — Typed affine model and dependency rank.**

C307 typed model: n=q+8993,r=q+8395,b=−q−2832,p=b+650. Rank4/5variables; n−r598 isdependent. Withq−5290+i, r−p2i−3 andn−p595+2i. Requiring600raisesrank5andforcesq−5287.5andhalf-integer endpoints, outsideannualcenters. Source transport preservesphase; reflected b/p reversesit. No globalplacement result.

## Standing context

C276: the selected cross-index alignment fixes δ=h−f=598; source transport alone does not. Absolute placement remains a separate premise. Preserve source and map roles, annual indices and ±1/4 phase ancestry. Co-located images do not identify events.

K=529; E=25/23; P=70/69. Global Mirror January AD 1; established local junction x=1, January AD 2; no civil year zero. Regular Gears Noah/Shem/Flood only. No cumulative/upstream Gears, primer reopening, canonical/graph changes or new global axis/z-law. Capture now, canonize later.

Supplement: LXX Creation 5494 BC +8464→AD 2970 versus reflected Conquest AD 1406 gives1564→1700 by25/23; Jared4534→AD3930 versus reflected Exodus1446 gives2484→2700. LXX Creation→Jared960, MT460; offsets1380/880; difference920→1000. AD3746/2300 superseded. Awareness only.

C-series reports remain distinct from original unprefixed Reports01–10 and unestablished interrupted Reports11–25. The superseded AD1905–1911 lookup remains unexecuted.

## Verification

15 mathematical/domain checks and 8 source authentication checks passed; two generated readouts replay byte identically. Author review only. File_18, File_09, C265 certificate and C127 unchanged; graph208 nodes/382 duration edges.

## Best next bounded step

C308: Compare the two already supplied cumulative reflected anchorsAD1406 andAD1446 using the same bridges, regularAD6 and fixed72×528 register; distinguish point counts from complete600 segments.

Reason for selecting it after C307: The interface dependencies are now explicit; the remaining finite specificity question is whether the neighboring supplied anchor yields the same kind of structural coverage.

High is sufficient unless a later dependency requires reassessment. The next step was not executed as part of C307. The authorized batch continues through C310.