# Retain-positive-face candidate, geometry admission only

2026-11-13 before native observations. Copy the ORIGINAL geometry factory into
an explicit candidate function. Change only its function name and the positive
edge admission: after ORIGINAL coordinate-duplicate cleanup, omit zero-length
edges only, instead of length<=tolerance*domain_diagonal. Keep all original
area/partition/face agreement/orthogonality/normal-closure checks unchanged.
Do not modify original headers, root/module xmake, archived binaries or defaults.
The source-copy transformation is verified exactly before building.

Fixed matrix: three previously specified9-site patches(delta0,8e-9,8e-7),
plus frozen actual geometries u20/u10fine-dt10us, u5coarse10us, and u5failed
fine-dt last SAVED40at1.25us. These are geometry observations, NOT trajectory
reruns or actual rejected78-state reconstruction. Serialize x,y,A in native
code units(L=1e-3m), preserving17digits and ids. Actual import area relative
gate1e-9 is inherited from the original snapshot probe, not changed posthoc.

Run original and candidate in the SAME process on each input. Expected pattern:
original9-site failure reproduces; candidate admits it under the original
1e-9 normal gate,1e-10 area/partition tolerance and<=1 orthogonality certificate.
Both factories admit the two manufactured controls and four actual snapshots.
Where original is admitted, require identical cell vertices/areas; control
conductances and pairs identical on the two manufactured controls. On actual
snapshots report any additional retained faces and conductance differences;
do not demand an invented byte-identity rule or claim operator equivalence.

Preserve every output, exception and negative result in this fixed matrix;
do not vary deltas or gates, retry observations or replay old trajectories.
Geometry-only admission cannot establish consistent curved-energy derivatives,
physical flux/work, nonlinear dynamics, time/space convergence or C1. Further
derivative and actual-dynamic checks required before any adoption/long rerun.

Configuration/build caps300s each, per-observation60s,7inputs total<=420s.
No >2h job. White Nature red/blue PNG/vectorPDF, raw byte archive and source
seals. Original failed pair,10/50/200us and fullC1 requirements remain open.