Originally published on xroot.dev . "Revoke the upgrade authority" is the last line of every honest token launch checklist and the first thing an auditor looks for. It is the on-chain promise that the code holding your money will never change. It has always been one instruction: set the program's upgrade authority to none, and the program is frozen forever. For a class of programs, that instruction will fail once SIMD-0500 activates; as of 17 September 2026 the gate exists in the validat...