# 490d Mirror checkpoint after C339

24 September2026. **C339 complete; C340 unexecuted.** 4 steps remain in the current authorization. Read this checkpoint and report first; frozen predecessor records retain earlier findings. Current decisions override stale archive instructions. Do not repeat completed research.

## Current result

At the named G2 control,500/100 gives1058→1150→1250 and92|100; valid502/98 gives1058→1152→1250 and94|98. The doubleE endpoint relation survives; complete two-stage source realization is modal.



## Retained context

C333 remains the completed predecessor synthesis. All four C287 SP paths support 2K=1058=950+108 through actual source-qualified SP Noah death. Primary partitions are 460+490+108; companion partitions are 459+491+108 with actual MT Noah. The primary death keeps its inclusive/harmonic qualification. C332 death conditions retain 02 and 22 at i3/i5; adding two17K conditionally selects22. C319's i3…7 control slice does not replace C287's complete i2…5 domain. C314 reversal requires i+j=10 with opposite cumulative ancestry phases; C313/C315 same-ancestry failures remain. C323's optional combined support criteria alone isolate i=j5. Source-explicit local E expansion prescriptions are retained, with no established link to the particular regular SP→MT context translation. Named500/100 and502/98 bindings remain distinct. Repeated source coordinates, phases and verification counts are not independent witnesses. Corrected LXX8464 supplement remains awareness only:1564→1700,2484→2700,920→1000; AD3746/2300 is superseded. The earlier incomplete September17 local ZIP differs from the later verified intact original. C-series, original unprefixed reports and Engine reports remain distinct.

Mirror/529 focus: K=529, E=25/23, P=70/69. Global paired Mirror January AD1; local junction January AD2; no civil year zero. Regular Gears are Noah/Shem/Flood only. SP minus-one person companions remain local to SP Noah/Shem; Flood close is a separate boundary. No upstream/cumulative Gear, new endpoint or phase, fitted anchor, global axis, primer reopening, canonical or graph edit. Capture now; canonize later. Source identity, context, modal binding, generated coordinates and phase ancestry stay distinct.

## Verification

13 main checks and 16 frozen-input/predecessor authentication checks passed. A second main replay produced byte-identical DATA/RESULTS. These checks and the source interpretation were performed by the root agent; no new independent-agent review is claimed. All frozen originals and standing controls remain unchanged. Verification counts are not independent-witness counts.

## Best next bounded step

C340: Insert the matched SP Noah death into the verified interval ladder. Resolve the primary, companion and named502/98 interior partitions from existing records, retaining the primary-death qualification and forbidding imported MT companions.

C339 separates invariant outer endpoints from a modal interior. The previously established950+108 relation can now connect directly to the verified92/100 gains and reveal their dependence.

Continue within the authorized batch, reassessing after the next completed result.