Starfinder - Toughness Feat auto calulating mod question

So as part of the Toughness feat, it states "For every character level you have (and whenever you gain a new level), you gain 1 Stamina Point."  Is there a way to add this bonus as a mod so that it calculates automatically upon leveling?  I can't seem to find any reference as to what the variable for level is or how to make a mod that calculates by level. I tried some searching around, but apparently my Google-Fu isn't up to figuring this out.

If it's not already using an autocalc field or sheetworker to do this for you, there's not much you can do with a free account. Is Charactermancer available for Starfinder, or is it manual leveling? Do you roll or use average for HP/Stamina on leveling? You can certainly create a macro that will calculate your HP/Stamina on level-up, but you do need to run it manually and enter the value manually. There's no way for a free account to write values to a sheet this way (needs API), and an API script for specific Feats only on level up sounds pretty niche anyway. I'd expect players to either remember their bonuses, personally. Even 5e doesn't apply Feat math automatically via Charactermancer. You might be better off keeping notes on what you need to remember on level-up if it's a feat-heavy game and this isn't tracked by the sheet. You could create a macro to calculate this for you, but all it's doing is adding 1 Stamina. You may as well just write a note.

Sorry for the late reply, our group was out of commission for a few weeks due to some members having family in town and I totally forgot to check the forums. Not sure what the Charactermancer is to be honest.  We're using the default character sheet that comes with the Aeon Throne adventure.  I did some more playing around with the sheet after I typed this initially, and discovered a few more tricks, but haven't figured out the particular trick I was attempting about using character level.  I think for now, it's just going to be a manual process. *EDIT* forgot to mention, Starfinder calculates HP and Stamina based on your character's Race and Class, no rolling at all.