Creepy af story (constant happiness, constant depression, self-directed brain rewiring, etc), as always when Gregan starts thinking about brains. Available online, and I liked reading it in the end. Distinctly early 2000s though, and not just because it lives on utilitarianism.com. Very HPMOR vibes (not the main work, maybe, but definitely the basilisk one), in how it’s kinda preachy.
Archived PDF, in case the link above doesn’t work.
This book is part of the 2022 Backlog Incident.