# 490d Mirror checkpoint after C435

25 September 2026 UTC. **C435 complete; C436 unexecuted.** 9 steps remain in the current authorization. Current decisions override archived next-step text.

## Current result

All2238 six-map/input trials yield23 sourced first-leg outputs,10 integer final outputs,8 sourced final outputs and two complete coordinate paths: old2148→2020→1956 and additional3206→3170→3206, both withp3620/q2756. The loop has signed gaps414/−414 and changes36/−36, with SP/LXX-OFF Shem-birth endpoints and SP/LXX-OFF Flood-start intermediate. Its16 Cartesian label assignments are not yet16 same-record returns.

## Earlier results in this batch

This is the first step of the current batch.

## Baseline and standing scope

C434 is the authenticated baseline. Its checkpoint is frozen in sources/C434_CHECKPOINT.md. It derives25(215−130+1)+23×950=48×500, and the six source-pivot comparisons p=N−86, q=N−950, H=N−500. Only G1/T0 has its complete2K path2148→2020→1956. The SKL appendix and corrected LXX8464 observations remain supplemental; no redirection follows. C432’s E excerpt locator was corrected in C434 to File_46 L3, lines117–133; prior arithmetic already used25/23.

Mirror/529 focus: K=529, E=25/23, P=70/69; J=300/299 remains File02 gap conversion, not a calendar date operator or Residue Protocol. Regular Gears are Noah/Shem/Flood only. SP person companions are local to Noah/Shem; Flood close is an independent event boundary. Both500/100 and502/98 bindings remain valid; SP primary Noah death retains its inclusive/harmonic qualification. LXX native Cainan is ON; OFF is theoretical removal. Global paired Mirror January AD1; local junction January AD2; no civil year zero. No new source point, phase, fitted axis, upstream/cumulative Gear, primer reopening or canonical/graph edit. Capture now; canonize later. Coordinates, source labels, context aliases and derived comparisons remain distinct. Counts are not independent historical witnesses.

## Limits and verification

Finite frozen-domain result. Opposite signed gap directions and start/end aliases remain explicit; no global source-preserving action is established.

2244 calculation checks and 18 source/predecessor authentication checks passed. Main result files replay byte for byte. These are root-agent checks, not an independent-agent review or independent historical witnesses.

## Best next bounded step

C436: Audit the source states and label identity of the3206→3170→3206 loop; derive its36-year offset from the existing100,60 and Gear4-year difference, and distinguish mixed-direction affine closure from chronological succession.

The census adds one sourced loop. Its event roles, source aliases and direction must be resolved before broader structural claims.

Continue within the authorized batch and reassess after the next result.