My initial perception of this is, that it’s more complicated than it sounds. Intercepting “/“ commands in the chat is simple. But routing them might be tough. They’re going to have to go through the character sheet if I’m to reuse my work investment. So there has to be a handle to the character sheet. What if the player had two characters, a side kick, a valet, a minion or familiar? What if the character’s name changes (as it does with my Druid Wild Shapes extension)? Obtaining a reliable handle might not be trivial.
I’ll look at this, but it might be more than I’m willing to take on. Especially right now, I’m pretty busy.
I’m not near FG right now or I'd do this myself, what happens if you drag the skill, e.g. acrobatics, on to the shortcuts bar? If it works at all it probably pre-evaluates the roll and saves result. I.e you roll the same acrobatics check value each time you use the saved shortcut.