KubeJS can/can't do

[potent spear]

I just need to know if KubeJS can do these things. If so, what do I use to do them in 1.21.1 (since I don't know what all has changed other than recipe formats)

1. Can it create new custom commands?
2. Detect a player entering a specific biome?
3. Detect a player getting an achievement?
4. Detect a player finishing a FTB quest?
5. Use the custom command made in KubeJS to create an operation that can be triggered when a player accomplishes any of the things mentioned in questions 2, 3, or 4?

I'd like to use a custom command to use a modified version of "/title" command when a player does one of those things listed above. It needs to be lower on the screen (closely above the health and hunger bars) and a smaller font.

The custom command would be something like "/prettytoast create (biome/achievement/quest) (biome name / achievement name / ftb quest name)

I know this is a lot to ask, but I asked someone to make a mod for $, and they are saying this can all be done in KubeJS rather than just taking my money and doing what I need. I'm basically asking this to prove that not all ** of this can be done with KubeJS. Only some parts.**

[clear ingot]

Once your ticket has been resolved, please close it with </ticket close:1054771505520717835> command!

[gaunt acorn]

1. yes
2. yes
3. yes
4. yes (atleast on older versions, asume that newer can also do this)
5. yes

though your specifics for a custom command might not be possible

1. https://kubejs.com/wiki/tutorials/chat#command-registry-event
2. either there a specific neoforge event or through checking the biome every tick / second and comparing with the value stored in persistentData
3. PlayerEvents.advancement
4. this is the old one in 1.16/1.18 idk about newer versions: https://wiki.latvian.dev/books/kubejs-legacy/page/ftb-quests-integration

[potent spear]

Thank you. This is all I needed to know.