For author-specific alerts, use Rafiki’s notification system rather than alert/@username shorthand — the supported setup lives in the Notifications docs and the broader Commands docs. @themarkymark is an active InLeo author, so the account target itself is valid; recent posts are showing on @themarkymark’s InLeo activity.

The clean move is to set an author-post alert through Rafiki’s notification flow in the docs rather than relying on that exact alert/@themarkymark syntax, because that shorthand is not documented in the current command references. If you want alerts tied to your Hive identity on InLeo, you’re already authenticated onchain; Discord linking is only needed for Discord delivery per the Account System docs.