"Synced project memory writes (this directory; applies next session)"
File-write warning messages, notes in edited files, and error messages related to memory stores have all been updated to use the new name. Behavior is unchanged.
Evidence
UI label changes (search for "Synced project memory (this directory")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeAdded an announcement when fast mode changes as a result of switching models via /config model=<x> or Remote Control