Had someone else test this mod to see if it works. And it works just fine.
So DeathGun, you just did things incorrectly.

OP-G Already has the lines of text on the items.

Alright, the crafting issue, and storage zone issue SHOULD have been solved.

Okay, in that case something weird is going on, because all you need to do is enable the mod, load it before OverPowered Gaming and that should be that. Done deal.

Now it won't remove building that has already been generated, only prevent future generation.

So if you start a new temp game, and enable dev mode, use "basegen..." then select settlement.
then just mark a huge area, and it should not generate anything with my mod.

I'm not trying to modify the mod in any way.

I just thought that if I just add the library, the mod items (OPG walls, interior items, etc.) will stop appearing.

But no... They still appear during world generation.

And, as I understood from the description you attached to the library in the workshop, you need to add some line...

So I'm trying to understand... What and how do I need to fix...

Either I just didn't understand the purpose of the library... or the initial generation can't be fixed... I don't know...

NOTICE: There is a bug discovered with the mod that i'm waiting for Taranchuk to help patch.
Any item marked "Players only" are also removed from crafting ingredient lists and storage zone lists. And possibly more.
I reached out to Taranchuk, but they are not yet online. Most likely at work as of writing this.

Let me ask this question: What are you trying to do here?
Are you trying to mod your own stuff, or someone elses mod?
If you come to my Discord server i might be able to help you more directly - Link above

(Yeah i just added the link, because i realized i had forgotten to do that lol)

Dude, forgive my stupidity. But I'd rather ask 1000 questions to figure it out, and maybe it will help those who decide.

1. In the library folder there is an archive called "Source code and sample patches". Do I need to unpack it?

2. If I unpack it, then to the library folder or to the mod folder?

3. If there is a folder hierarchy in the unpacking, then specify the path...

Sorry, buddy, if I finish you off...

Okay i see the flaw in my thinking.
Put that line of text into the Thingdef.
Example:
<ThingDef>
<defName>CB745_PointlessDoodad</defName>
<label>Blabhlbahdfhg</label>
<modExtensions><li Class="PlayersOnly.PlayerOnly" MayRequire="CopperBoltwire.PlayersOnlyLib" /></modExtensions>
</ThingDef>

Dude... I, who have no idea about codes at all... Where should I even insert that line from the example?

Okay... Okay... As always, I didn't check the description... So I'll have to write the exceptions myself?

It's useful, right?

THX very MUCH