This is pretty cool. Looks like it's local to the current repo which makes sense for most usage. Having something like this across a swathe of repos would be useful in different ways (ex: " What has Bob committed over all the repos for our projects that involves the string 'billing'? ". Minor off topic rant about the animated example: Who doesn't put a space at the end of their prompt after the $?! Ugh!
I've always had mixed feelings about that. Resolved it now, by using '>', no space, which doesn't look cluttered since there's only ~1px right next to the first char entered.