Action Point System?

I was wondering if someone would be willing to code an action point system for me, kind of similar to Bravely Default's, where each battler would have 4 action points and different skills would cost different amounts of points. I have tried to do so, but due to my limited knowledge of JavaScript, I haven't been able to accomplish it. It would be much appreciated also if someone does make this, if they could make it compatible with Yanfly's STB Battle system. Much appreciated.

Couldn't you use TP as AP? Sometimes the best way to avoid having too many plugins (and, with it, higher chance of incompatibility) is trying to work around it with what the engine gives us.

I have actually commissioned a plug in for this purpose.

This plug-in, in combo with a couple of other plug-ins, using TP, and creative databasing, I will be able to achieve a AP system similar to that of Four Heroes of Light and somewhat of the Bravely series (with the exception of being able to go negative).

I have yet to test it out yet for compatibility and it is not entirely done..
Once it is tested and works, it will be released to the public. PM me if you're interested in volunteering your time to beta-test. If you volunteer your time and effort, I will share it as an early release. :)

-MIA

I guess I could use tp, but I was planning on using tp as a different resource instead so unfortunately I can't.

Without considering the the compatibility with Yanfly's STB Battle system, you may want to treat DoubleX RMMV Action Cost as an alternative :)
Regarding the compatibility, however, I suspect whether it's even possible, due to this characteristic of Yanfly's STB Battle system:
"Each battler is only allowed one action per battle turn"
If I grasp it correctly, it'd mean it's totally against what you're trying to achieve :D

This sounds more like a Press Turn Battle System, which I have seen iterations of for VXAce, but not for MV yet. There's been a lot of requests for it too. =T