Question(s)

[Fireworkstars46]

Is this the GitHub page for the amidst tool?

[FeedTheChunk]

Amidst is long been dead. But yeah

[Fireworkstars46]

Cause I play legacy mc version 1.12 and 1.6 (horse update) and the main page (chunk base) doesn't support it and also modded world types and making sure if it's it cause amidst supports loading the world with the world files itself to always work with modded world types.

[Fireworkstars46]

My next question is, how exactly do I search for specific biomes/structures etc?

[Werewolf-Wu]

My next question is, how exactly do I search for specific biomes/structures etc?

@Fireworkstars46
Try using Cubiomes Viewer.
If you want to know specific biomes/structrures, you just need to know the seed of your save file.

if you want to know the seed of your current playing world(single player):
(If you have enabled cheat/): type /seed
(if you haven't enabled that): (at esc screen)open it to LAN , enable "Allow Cheats" in the settings menu, and then type /seed.

[Fireworkstars46]

Does this new app have the option to open a world with the level.dat files?

[Werewolf-Wu]

Does this new app have the option to open a world with the level.dat files?

This app only supports seeds.
However, I suggest giving it a try—what if it works? It's easy to download and use.