Certainly no knitting, sewing, laundry, etc.
This year I heard a chissush from a dayan, that perhaps cooking would also not be allowed. The premise is that the woman needs to do a “recognizable” abstention from work. So if a woman would generally putter around in the kitchen and cook, then she should refrain from doing so during this half-hour.
First time I heard this. Thought I would share…Would appreciate feedback if anyone has heard this concept before.