# 490d Mirror checkpoint after C322

24 September 2026. **C322 complete. C323 unexecuted.** 1 steps remain in the current C314–C323 authorization. Read this checkpoint and its report first; use the frozen predecessor checkpoint and certificate for inherited state. Do not repeat completed work or follow stale archived next-step paragraphs.

## Current finding

All3sameGearNoah-boundSP→MTbiographies transfer−460 at15endpoints/30components. MTtextual502 is a distinctbinding, notsameGearfailure. JointOFF/ON/reversed500/C287-i supporti3,5; additionalC287-j condition leavesi5.

**All three primary same-Gear Noah-bound biographies transfer uniformly by460 years**, from SP OFF/Terah0/full430 to MT CainanON/Terah60/full430. Every endpoint is in the frozen source register; all15 endpoint and30 component comparisons have zero residual.

| Gear | SP: Noah→Shem→Flood start→Noah death→Shem death, BC | Restored MT same-Gear chain, BC |
|---|---|---|
|G1|3706→3206→3106→2756→2606|3246→2746→2646→2296→2146|
|G2|3708→3208→3108→2758→2608|3248→2748→2648→2298→2148|
|G3|3710→3210→3110→2760→2610|3250→2750→2650→2300→2150|

Each chain retains500+100+350+150, Noah950 and Shem600. The success is qualified by the **Noah-bound/Flood-bound500/100 state**. SP primary death and MT target qualifications remain attached to their source records.

The initial hypothesis that same-Gear MT must instead give502 was rejected by the actual register and File_18 §1.3.5. That passage explicitly preserves both the Noah-bound harmonic state and Arphaxad-bound/textual state. For example, restored MTG2 Noah3248 with G1 Shem2746 gives502 and Shem→G2 Flood2648 gives98. This separately selected binding is valid in its own mode; it does not invalidate or replace the same-Gear500 correspondence. The failed initial assumption and its source correction are recorded in TEST_PLAN.json. No date or source instruction was changed to obtain the result.

The completed family has this joint support:

| i | OFF600 | NativeON600 | Reversed SP500 | C287 at i | C287 at j=10−i |
|---:|---|---|---|---|---|
|0|No|No|No|No|No|
|1|No|No|No|No|No|
|2|Yes|No|No|Yes|No|
|3|Yes|Yes|Yes|Yes|No|
|4|Yes|No|Yes|Yes|No|
|5|Yes|Yes|Yes|Yes|Yes|
|6|Yes|No|Yes|No|Yes|
|7|Yes|Yes|Yes|No|Yes|

OFF600 +ON600 +reversedSP500 +C287 at i coexist at i3 and5. Adding the **extra** requirement of C287 support also at j leaves onlyi=j5. That uniqueness is conditional on the listed criteria, not an independently preferred chronology. The configurations retain different traditions, variants and ancestor roles; co-existence does not collapse them into a single identity. C315's same-ancestor8395 failure and C313's same-phase-ancestry500 failure remain unrepaired.

## Retained context

C277–C310 and C311–C313 remain completed. C311 found no prescribing annual selector in its three-source audit; C312 admitted four complete cumulative transports and five SP targets; C313 found a center500 match only at j5 and no same-ancestry exact component500 match. The +155 regular normalization is local. C287 complete four-node indices remain2…5; direct17K admission is weaker. The original AD1905–1911 proposal remains unexecuted. Supplemental Engine ReportIII explicitly derives the LXX OFF field; older182/777 and mixed Cainan headings yield to File_18. Corrected LXX crossover8464 observations remain awareness only:1564→1700 and2484→2700, difference920→1000; AD3746/2300 is superseded. C-series and original unprefixed/Engine report series remain distinct.

Mirror/529 remains the focus: K=529, E=25/23, P=70/69. Global paired Mirror January AD1; local junction x=1 January AD2; no civil year zero. Regular Gears remain Noah/Shem/Flood only. SP minus-one companion is local to SP Noah/Shem. No cumulative/upstream Gear, new endpoint or phase, fitted anchor, global axis, z-law, canonical or graph edit. Capture now; canonize later. Source state, event identity, generated coordinate and phase ancestry remain distinct. Exact arithmetic and source membership do not establish intention or independent historical witnesses.

## Verification

39 main assertions and 16 frozen-input/predecessor checks passed. A second main replay produced byte-identical DATA and RESULTS. Separate review scope and agreement are recorded in the evidence. All frozen originals and standing controls remain unchanged. These are verification counts, not independent-witness counts.

## Best next bounded question

C323: ConsolidateC314–C322 into the tenth bounded step: a source-qualified529 synthesis, minimal dependency and limitation ledger, verified report/evidence index and recovery packets. No new endpoint or anchor search.

The finite algebra, source domains, exact phases andwholebiography qualification are now resolved sufficiently for a reliable synthesis. Further transformations would add scope instead of closing this authorization.

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