FWIW I got an email from the Sanders camp the other day that say they're working on a specific federal jobs guarantee that I assume will be introduced in Congress shortly so don't expect Gillibrand to out-left Sanders on this issue.
And here it is:
https://www.washingtonpost.com/news/wonk/wp/2018/04/23/bernie-sanders-to-unveil-plan-to-guarantee-every-american-a-job/?noredirect=on&utm_term=.da5d128dbc65It's more far-reaching than Booker's proposal but seems to be along the lines of what Gillibrand says she favors. Will be interesting to see which one(s) she signs on to, as well as where Harris stands on this.