GATE D4
Exact tight-interface closure at p=191
What changed
The extrapolation is replaced by an EXACT count: the k=13 tight residual is 16,171 orbit-classes, with an exact mass identity B0 + B1 + residual = 14^13, computed without enumerating the 14^13 fiber. Every representative is proper at the fixed prime p=191.
Evidence
check 1Exact residual orbit count = 16,171 (Burnside = canonical augmentation)
check 2Exact mass identity B0 + B1 + residual = 14^13, all 16,171 reps proper at p=191
check 3Two independent verifiers ACCEPT, 16 of 16 corruption attacks rejected by BOTH
Verification: double · I2 · 13 artifacts (reports, verifiers, corruption suites, manifest with SHA-256)