My player character is a bird. He can only carry one item at a time in his beak, and if there's something in his beak he can't tweet or peck.

Thanks to the documentation, I've figured out how to set an inventory limit to prevent carrying more than one item at a time.

But I can't figure out how to determine whether the inventory is full when I'm handling another verb. In my case, knowing the number of items being carried would also work, because in my case I only need to see if that is 0 or 1.

From memory:

: if (carried() < carry_limit()) {
   // room in inventory
}