^ Basically this. I made very quickly a small java program that reads the undertale.ini file every 10 seconds and look for the fun value. If the fun value is 40-50 it says there is a phone call and if the fun value is 66 it says there is an extra room in waterfall, otherwise it says it's safe.

The game generate the undertale.ini file as soon as the game starts. With that, a runner could almost instantly know if there is gonna be a phone call, and actualy reset in the very first seconds of the run to not get it.

Now I wonder, would using something like that be allowed ? If it is I could obviously give the jar file to run it yourself or even the source code (I don't care, even if the code is likely ugly, I'm not that good). If it isn't, at least it helped me derust my programming x')

This almost certainly falls under using third-party software/assistance to help run the game, and so would very likely not be allowed, as it shouldn't be. Undertale has gone through its share of rule changes to standardise the game, and the constant goal has been to ensure the game is ran as close to its factory state as possible.

I believe this to be the correct course of action for the game, and it's likely that the moderators will be in unanimous agreement on that.

This is not allowed sadly It's third party software which means this would be tool assisted good program though

Well I kinda expected that, but I tryed it because I had nothing to loose, it didn't took long to make and if it was going to be allowed than I could've made something usefull. Maybe next time for something usefull (Likely never ._.)

You could but I don't think it's gonna be allowed if what I did isn't as it is basicaly the same thing.