[throwaway probe C — plain prose] closing-keyword reading for #8476 step 1 #8522

Throwaway target for the #8476 step-1 live reading. This issue is the PLAIN-PROSE POSITIVE CONTROL: the same throwaway PR will carry an unformatted closing keyword bound to this number. Its whole job is to prove the link mechanism was live and readable during the reading — without it, "no link on the fenced arm" cannot be told apart from "links only materialize on merge".

Closed immediately after the reading. No work is requested here.