Helpers get to work in a fresh folder
A sub-session working in a new folder used to stop and wait for you to turn on Versions history there. It now starts editing and mentions it once.
Each sub-session works in its own copy of the project. Versions does not record history for a new folder until you confirm it, and the agent's instructions told it to wait for that before changing any file, so a helper could stop before doing anything.
Editing never needed that step; only the history does. The agent now goes straight to work, says once that the folder's changes are not in Versions yet, and still never turns Versions on for you.