I'm pretty certain there isn't one.
That's what I was thinking too. But I see to recall a pretty slick alias or two floating around that did a before and after on inventory and the computed some kind of difference, which might suffice.
trackitems => ashq int [item] currentinv = get_inventory(); int currentmeat = my_meat(); try{cli_execute("%%");}finally{ int [item] postinv = get_inventory(); int postmeat = my_meat(); foreach i2,c2 in postinv{if (postinv[i2] != currentinv[i2]) print(i2 + ": " + (postinv[i2].to_int() - currentinv[i2].to_int()));} foreach i1,c1 in currentinv{if (postinv[i1] == 0) print(i1 + ": " + (-c1));}if (postmeat != currentmeat) print("Meat: " + (postmeat - currentmeat));}