AgentCreationKit — Development skill for Claude Code

AgentCreationKit

Tools that let AI coding agents (Claude Code, Grok Build, ...) work on Bethesda game mods without a human clicking through the Creation Kit or FO4Edit. Built while restoring a real Fallout 4 mod ([Custom Legendary Modifications](https://www.nexusmods.com/fallout4/mods/5565)), so every feature exists because a real modding task needed it.

Python 3.10+, Windows, no third-party dependencies.

What it does

Module	Purpose
ack.xedit	Run FO4Edit/xEdit Pascal scripts unattended: generates the plugin list, launches xEdit, watches its windows, answers only allowlisted dialogs, closes it when the script is done, and returns a report.
ack.plugin	Read and write plugin files (.esp/.esm/.esl) directly. Lossless: unmodified data is written back byte-for-byte (verified on Fallout4.esm, 1.5M records).
ack.archive	Extract files from BA2 archives (general and texture archives; textures come out as .dds).
ack.nif	Inspect NIF models and patch length-prefixed strings (e.g. texture paths) while keeping the block table valid.
ack.ck	Drive a running Creation Kit like a level designer: load plugins, open cells, select objects, set exact position/rotation/scale, move the camera (zoom, pan, orbit, or look from a bearing/elevation/distance), screenshot the render window, generate navmesh, compact form IDs, save.

Setup

copy config.example.json config.local.json   # then set your game, xEdit and work paths
python -m unittest discover -s tests -t .

Usage

python -m ack xedit scripts                                  # list bundled xEdit scripts
python -m ack xedit run check_errors "MyMod.esp"             # read-only run
python -m ack xedit run clean_masters "MyMod.esp" --save     # editing run
python -m ack plugin info "D:/.../Data/MyMod.esp"
python -m ack ba2 extract "D:/.../Fallout4 - Meshes.ba2" "meshes\effects\laser*" --out extracted

Driving the Creation Kit (`ack.ck`)

python