Learning

Tier	Examples	Applies when
Memory	Prefer B after swaps; reject after quality rejects	Immediately (undoable)
Factors	Portion EMA from edits / delivery feedback	Immediately (bounded)
Proposals	Standing approval, default mode	Only if accepted (+ new slip if needed)

Never auto-changed: diet, budget ceilings, policy code. Eval gate replays recent carts before a change goes live.