I have little to no scripting knowledge so I have been relying on pre made scripts. So far that has worked just fine, but I am having trouble with my skill system. https://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/learn-skill-engine/I am using Yanflys skill learn script and I have it working just fine. However, it only unlocks skills. I am wondering if there is a way to add permanent stat boosts to the list. For example:

At level 2 Fire Slash is unlocked to purchase.
At level 3 Atk+4 is unlocked to purchase. (This is what I don’t know how to do.)
At level 4 Ice Slash in unlocked to purchase.

I have tried making a skill called atk+4 and then having an event check to see if it is learned and then adding the boost through the event. Doing it that way leaves a useless skill in the list. If I remove it in the event, then you can purchase it over and over.

I am wondering how I can make this work. Ideally, without having to use auto or parrell events slowing things down. Is there a script that can accomplish this? Would I need to edit Yanfly’s script?

Can't you create a "Atk+4" skill, and set the efrect of the skill to be the +4 boost?

I want the effect to add plus 4 to the attack stat permanently. Not just a temporary buff in battle. Maybe a better example would be +200 HP. Once you unlock it in the list the characters HP will go from 350 to 550. The stat change should carry over regardless if the character changes classes.

I don't think Yanfly's script allows for that sort of thing, But I found another script that does exactly what you seem to want, though I'm not sure how compatible it is with Yanfly.

http://forums.rpgmakerweb.com/index.php?/topic/4693-passive-skills/

I actually looked over that script a little and it might work. The problem with using states is that parameter increases is based on percentages instead of a base increase. I might be stuck with that. I will have to do some testing.