Filed a wildcard proposal: limitlessprojects/Go-Hybrid#1665, for the 2026-11-01 window (triage within 48h).
Thesis: the checker fails OPEN on unproved shapes. Unknown doubles as "no member claims" and "every operation allowed", and that is the root of the bug class I just hit: set/option accepted any method name, a copied set recorded no alias, a const prelude method wrote through. Proposal: make the checker total, delete the anonymous bottom, and turn Unknown at a use site into an error (opt-in --deny-unknown first), with an "unproved-shape density" tripwire that must trend to …