mashup-mods SKILL.md skillA

mashup-mods from rehan-remade/universal-modder is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add rehan-remade/universal-modder/mashup-mods@git:20261012.672e6a5

Pins git:20261012.672e6a5 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
rehan-remade/universal-modder
Path
skills/mashup-mods/SKILL.md
Versions recorded
6
Latest version
git:20261012.672e6a5, committed Oct 12, 2026
First version recorded
Sep 30, 2026
Size
13,801 bytes
Repository stars
8,440
License
MIT

Build cross-game mashups and total conversions, the "Minecraft inside Elden Ring" or "skateboarding in MW2" kind. Covers passthrough mods (two games running at once and exchanging state, rendering and collision), porting one game's content or mechanics into another, embedding a decompiled game as a library, and clean reimplementations that read the user's own game files. Use when the user wants to combine two games, bring an enemy, mechanic or world from one game into another, or rebuild a…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Mashups: putting one game inside another

In September 2026 a wave of AI-built mashups went viral: skateboarding in MW2, Minecraft inside Skyrim,
Elden Ring and Mario 64, Black Ops 2 inside Minecraft. They use a handful of patterns. Pick the lightest one
that delivers the idea, and plan the oracles before writing code: these projects fail by drifting, not by
lacking code.

## Before picking a pattern
Work through these steps before writing any mashup code. The routes, patterns and projects they point to
come from existing mashups. Start from the closest one, or design something else and write down why. The
Guardrails at the end always apply.

1. **Work out what the user wants from the guest game.** Its real behaviour (physics, inventory, combat),
   or only its look or one mechanic? Ask if it isn't clear. The answer decides whether the guest has to
   run at all, and which route is the lightest that delivers the idea.
2. **Name the closest mashup route.** `knowledge/techniques/choosing-a-mashup-route.md` sorts mashups
   into seven routes. "Passthrough" on its own is ambiguous: it covers three different builds (state
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add rehan-remade/universal-modder/mashup-mods@sha256:e2c2842bcad78806

The line at the top of this page pins the label git:20261012.672e6a5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_rlotmhxlqr5revm4.svg)](https://markdownregistry.com/a/art_rlotmhxlqr5revm4)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 6 versions of this file, between Sep 30, 2026 and Oct 12, 2026, about one every 3 days.

versioncommittedcommitsizeaudit
git:20261012.672e6a5 latest2026-10-12 672e6a5 13,801 BA view · diff
git:20261008.2131b2c2026-10-08 2131b2c 13,325 BA view · diff
git:20261005.e8632962026-10-05 e863296 9,189 BA view · diff
git:20261004.5b437502026-10-04 5b43750 6,802 BA view · diff
git:20260930.15d6f9d2026-09-30 15d6f9d 6,769 BA view · diff
git:20260930.8ad57ae2026-09-30 8ad57ae 5,426 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (13801 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

rehan-remade/universal-modder · 8,440 stars · license MIT · pushed 2026-10-19 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_rlotmhxlqr5revm4
GET https://markdownregistry.com/api/v1/resolve?ref=rehan-remade/universal-modder/mashup-mods
GET https://markdownregistry.com/api/v1/blob/e2c2842bcad788068f3c964913f5b3dfe5a84efcfb656d4b6cfa116a2c4fb7b2

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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Every file in rehan-remade/universal-modder

Other files named mashup-mods

mashup-mods SKILL.md skill
rehan-remade/universal-modder · .claude/skills/mashup-mods/SKILL.md · Build cross-game mashups and total conversions, the "Minecraft inside Elden Ring" or "skateboarding in MW2" kind…
git:20261012.672e6a5 · audit A · 8,440 stars
mashup-mods SKILL.md skill
rehan-remade/universal-modder · .agents/skills/mashup-mods/SKILL.md · Build cross-game mashups and total conversions, the "Minecraft inside Elden Ring" or "skateboarding in MW2" kind…
git:20261012.672e6a5 · audit A · 8,440 stars

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