# 490d Mirror checkpoint after C304

24 September 2026. Latest completed: **C304 — Stored path provenance of both17K overlaps.**

C304 verified C127 N01_c−5288→N01_s3705 and N02_c−5287→N02_s3706, direct17K and868+13K+1248 paths. N02 additionally has299+299+650 via2757/3056; N01 would require absent ordinaryMTNoah3055. Stored13K MT Flood points2457/2458 differ from fixed2832 selections2456/2455 by1/3. C01 interface omission ofN01 was selective, not graph absence.

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 AD3746/2300 superseded.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 The superseded AD1905–1911 lookup remains unexecuted.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

13 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

C305: Test exact600 compatibility between the17K-selected SP Noah and the same-Gear SP Flood counterpart of the fixed2832 MT Flood selection.

Reason for selecting it after C304: The two comparisons now have verified source provenance, but their different MT interior endpoints leave the biography compatibility unresolved.

High is sufficient unless a later dependency requires reassessment. The next step was not executed as part of C304. The authorized batch continues through C310.