You'll notice
Lean-prompt sessions now get an explicit block of safety and confirmation guidance
What
Sessions running a "lean" or compiled-only prompt variant now receive an added block of operating guidance, instructing Claude to confirm before taking hard-to-reverse or outward-facing actions (unless durably authorized or explicitly told to proceed without asking), not to assume prior approval carries over to new actions, and to report outcomes faithfully.
Why
This brings safety and confirmation behavior that likely already existed in the full prompt into the lighter-weight lean prompt variant, so sessions using that variant still get the same caution around risky or irreversible actions.