# 490d Mirror checkpoint after C302

24 September 2026. Latest completed: **C302 — Complete 600-year segments and annual coverage.**

C302 binds C301 endpoint matches into source-qualified600-year segments: MT4, SP5, LXX3 labels, eight coordinate segments. LXX_OFF annual coverage is j0,2–7; j1 needs3057/2457, with only the lower MT Gear2 Flood-close point admitted. Four Flood-close labels remain unpaired. Regular context bindings and phase ancestry are preserved.

## 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 AD3746/2300 superseded.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 The superseded AD1905–1911 lookup remains unexecuted.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

9 mathematical/domain checks and 7 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

C303: Intersect the fixed2832 comparison family with the held8395 and17K source correspondences, preserving endpoint and Gear identities.

Reason for selecting it after C302: Complete segments have now been distinguished from isolated points; the useful next question is their overlap with the established source routes.

High is sufficient unless a later dependency requires reassessment. The next step was not executed as part of C302. The authorized batch continues through C310.