reverse-engineering SKILL.md skillA
reverse-engineering from rehan-remade/universal-modder is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rehan-remade/universal-modder/reverse-engineering@git:20261012.db94cbcPins git:20261012.db94cbc 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/reverse-engineering/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261012.db94cbc, committed Oct 12, 2026
- First version recorded
- Sep 30, 2026
- Size
- 6,463 bytes
- Repository stars
- 8,440
- License
- MIT
Read how a game actually works so a mod can hook it. Decompile .NET/Mono (ILSpy), IL2CPP (Cpp2IL, Il2CppDumper), Java (Vineflower) and native code (Ghidra, IDA, via MCP servers); dump data and asset formats; reverse-engineer a binary file format and prove it with a round trip; read live memory (Cheat Engine, Frida, x64dbg); find render passes (RenderDoc). Use when a mod needs game internals, e.g. "how does the boss AI work", "find the damage function", "what format is this .sld/.pak/.dat…
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
# Reverse engineering for mods Rule zero: **read the real thing, don't guess.** Decompiled code, the actual data, a live memory view or a GPU capture is the spec. Write what you learn into `MODLOG.md` (names, IDs, offsets, formats) as you go. Keep all decompiled output and extracted assets **outside** the mod repo (e.g. `~/<game>-decomp/`) and never publish them. Single-player, offline or servers the user runs. Never attach debuggers or scanners to games with anti-cheat (see `skills/mod-any-game/references/safety.md`). ## Pick the tool by what the code is (`um scan` tells you) **Managed .NET** (XNA/FNA, Unity Mono, most indie C#) - `dotnet tool install -g ilspycmd`, then `ilspycmd -p -o ~/<game>-decomp <Game>.exe` (or `Assembly-CSharp.dll`). This gives a full C# project you can grep. - dnSpyEx: step through with a debugger, set breakpoints, edit methods. - MCP: ILSpy-MCP / dnspy-mcp let an agent query types and methods directly. **Unity IL2CPP** - Cpp2IL (or Il2CppDumper) on `GameAssembly.dll` + `global-metadata.dat` gives types, fields, method signatures and addresses, plus dummy DLLs for ILSpy. …
Read the whole file at its exact version.
How to install
mdr add rehan-remade/universal-modder/reverse-engineering@sha256:a90b509a9967eecdThe line at the top of this page pins the label git:20261012.db94cbc, 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.
[](https://markdownregistry.com/a/art_afqb4kikrkj47w7p)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 30, 2026 and Oct 12, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261012.db94cbc latest | 2026-10-12 | db94cbc | 6,463 B | A | view · diff |
| git:20261005.a93ed66 | 2026-10-05 | a93ed66 | 6,252 B | A | view · diff |
| git:20261005.5f637de | 2026-10-05 | 5f637de | 6,192 B | A | view · diff |
| git:20261004.5b43750 | 2026-10-04 | 5b43750 | 5,283 B | A | view · diff |
| git:20260930.8ad57ae | 2026-09-30 | 8ad57ae | 5,262 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6463 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
rehan-remade/universal-modder · 8,440 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_afqb4kikrkj47w7p GET https://markdownregistry.com/api/v1/resolve?ref=rehan-remade/universal-modder/reverse-engineering GET https://markdownregistry.com/api/v1/blob/a90b509a9967eecd685047ca69b0326010137324a31b5c91dbd43101974cd35d
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.
More from rehan-remade/universal-modder
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