Because I just can't help being petty,

I am putting everything I do all day in the team chat my shitty coworker started to throw me under the bus. Since she is so concerned with how I'm doing my job, instead of her own, she gets to see what I do all day. If the boss says it isn't necessary, I'll simply say that there seems to be some concern about what I am and am not doing and want to be transparent. Also it helps me stay accountable for my work. I would prefer to continue this.