NTIL donor-refill exact checks, 3 November2026. Donor proposal/counts credited to lattice_lift_research; further tests prellberg_incidence_algebra. From extracted root run python3 session1103/check_interfaces.py; python3 session1103/audit_paths.py; python3 session1103/check_lookahead.py. Standard library only. Checks exact finite geometry and supplied paths, not policy sampling or timings. Global nonminimal donor listings omitted as unused by checks. Orbit v uses a,b=divmod(v-1,17), then C4 rotations of(2a+1,2b+1), pin37. No performance or density claim.
