Hello. I really enjoy using this mod.
As the title suggests, I’d like to add recipes for Krastorio 2's Advanced Assemblers (such as creating intermediate products directly from ore), but I’m not sure which files I need to edit.
I have absolutely no programming knowledge...

Hi, and thanks!

No modding needed beyond a single line. Krastorio 2's Advanced Assembling Machine uses four crafting categories — crafting, advanced-crafting, crafting-with-fluid and kr-smelting-crafting. The Assembling Plant already has the first three; the ore-to-intermediate recipes you mean are the last one.

Open prototypes/entity.lua in the mod folder, find this list near the top (around line 50):

local crafting_categories =
{
  "crafting",
  "advanced-crafting",
  "crafting-with-fluid",
  "assembling-plant-crafting",
}

and add one line:

local crafting_categories =
{
  "crafting",
  "advanced-crafting",
  "crafting-with-fluid",
  "assembling-plant-crafting",
  "kr-smelting-crafting",
}

Save, restart Factorio. The Assembling Plant will then accept every recipe the Advanced Assembling Machine accepts. The recipes still need their Krastorio research unlocked, same as for K2's own machine.

If you ever play without Krastorio 2, you can leave the line in — the mod checks at load time whether a category actually exists and silently drops it if not, so nothing breaks.

(Note: editing the mod folder means your change is gone after the next mod update, so you'd have to redo it.)

It worked! Thank you!