You would need to download the files from the GitHub, make your preferred edits, then use the mission builder script to package it back up as a mod.

Editing the mod now requires a higher level of programming knowledge.

I have looked into the .pbos within the mod itself in the !Workshop files. The .pbo is divided by Core, Events, Garage, GUI, Jeroen Arsenal, Logistics, and maps. My goal is to have a singular antistasi mission .pbo for chernarus autumn. It looks like all of the aforementioned content would need to be combined into a singular .pbo, correct? I would unpackage the core and then add the rest of the .pbo's into files within the larger .pbo?

Part of what I want to do is to get a singular mission file for one map that I can edit with ease.

Look at our developers guide. Mods work in a different way to missions and thus you need to know what you are doing and what the differences are before you start editing things.

Also always get the files from the github release page, editing stuff in the workshop folder doesn't work as steam automatically redownloads edited mods thanks to file integrity checks.

I followed it, I did everything it told me to do, I inserted -a3ToolsDir="E:\SteamLibrary\steamapps\common\Arma 3 Tools" -debug=true
into the builder config and ran antistasi builder.
It ran a console and then closed itself, nothing happened.

It says "the mod will have been built under the build folder in the repository root.", when I go there I see an "A3A" file with a bunch of .pbos

Specifically the .pbo's I listed above.

So it's worked as it should, as I said before, mods work in a very different way to missions as far as file structure and such goes.

That folder *is* the mod, no more packing required.

Ok, thanks. But now how do I properly extract a singular mission from these .pbos?

You don't
You can't.
You never need to anyway.

Just use it as a mod.

Ok, but wouldn't that mean that I'd have to republish my own edited version to the workshop since I can't just use a mission .pbo on it's own?

By the way it looks, the only way the server is going to use the mission correctly with the edits I made is by me publishing my edits to the workshop, since that's the only way the server will read the mission.

You wouldn't necessarily need to publish it to the workshop, but the files would need signing with the Arma modding tools. Alternatively you could disable signature checks on the server but this would allow the players to load whatever mods they like which usually isn't very useful.

This has clarified a lot of things for me. Thanks for responding.