That's great news!
I've been enjoying watching Shoretire the last couple of years. He's a busy, technically gifted player and, for someone still so young, he links up well in attacks and is a clever player with good touch and vision.
I can certainly see why the coaches have wanted him developing at U23 level this season, even though he's looked tidy rather than dominant at that level so far. Although, I think there would also have been an argument for, this season, mixing his time with the U23's and U18's so that he could be the main, dominant player some weeks at the younger level and then play more of a learning role when with the U23's?
But either way is fine, and he seems to be developing well. I'd be very surprised to see him in the first team squad this season, but it's great news that he's committed himself to the club and hopefully he'll be getting senior football next year at some level.