The KIndergarten readiness package we were given when my daughter was getting ready to go to JK indicated that
working on letter recognition
cutting with scissors in a straight and zig zag line
holding a pencil correctly
using a glue stick and having the motor skills to glue cut items to paper
and
writing their name
and counting and recognizing #s
They also recommended of course that you should teach them which way a book is held, which way words go across the page (left to right) and that pages are read left to right.
and they should be able to get their own shoes and do their own zippers on coats etc