Nice to see running notes on this particular technique.
A hypersigil is a narrative work which includes the author (and/or other targets of the working). Aspects of the story will tie with elements of the real world targets and their pasts, and also to events and changes that have not yet happened but you want to happen. A hypersigil is intended to be read or otherwise experienced by many people, ideally as a published book.
A hypersigil can also be a work of fiction intended to bring about a change in the mental state of the reader. Beware the Golden Barge by Michael Moorcock. Flatland by Edwin A. Abbott and White Light by Rudy Rucker are both hypersigils in as much as they help open the mind of the reader to the fourth dimension and some of the various infinities.
Maybe all good fiction is a hypersigil at some level.