Mod-81 configuration lift audit, 29 October 2026.

Contents:
- H_mod81_lift_reply_20261029.md: public response
- H_mod81_configuration_lift_audit_20261029.md: proof audit
- audit_H_residue_lift_20261029.py: exact finite interface checker
- audit_H_residue_lift_20261029.json: checker result

The checker composes the X/Y affine block coordinates through 12 blocks,
checks the mod-81 free-word counts, enumerates the finite affine residue group,
and checks the two legal inverse b-steps for the class 80 mod 81. It does not
reprove Nashida's imported asymptotic Section 12 estimates.
