Skip to content
TrustedSkillsbeta
Back to all skills

Ilspy Decompile

Checked
aaronontheweb·vlatest·security·MIT

Ilspy Decompile automatically decompiles .NET assemblies into C# source code for analysis and reverse engineering, saving significant time.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add aaronontheweb/dotnet-skills --skill ilspy-decompile -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

aaronontheweb

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned aaronontheweb/dotnet-skills at e426ed93a9.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
e426ed93a9
Manifest
skills/ilspy-decompile/SKILL.md
Scanned
1 file, 87 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill enables AI agents to decompile .NET assemblies using ILSpy, converting compiled binaries back into readable Intermediate Language (IL) code. It allows for the inspection of internal logic within closed-source or obfuscated applications without requiring access to the original source files.

When to use it

  • Analyzing legacy .NET applications where source code is unavailable but behavior needs understanding.
  • Debugging runtime errors by examining the actual IL instructions executed during a crash.
  • Investigating security vulnerabilities in third-party libraries by reviewing their compiled logic.
  • Extracting algorithmic details from proprietary software for educational or reverse-engineering purposes.

Key capabilities

  • Executes decompilation of .NET assemblies into human-readable IL code.
  • Integrates with the ILSpy engine to parse binary structures.
  • Outputs structured text representing method bodies and control flow.

Example prompts

  • "Use ilspy-decompile to analyze System.dll and show me the IL implementation of String.Concat."
  • "Decompile the attached MyApp.exe file and summarize the logic inside the Main method."
  • "Run ilspy-decompile on this assembly and list all public methods that interact with database connections."

Tips & gotchas

Ensure you have valid .NET assemblies to process, as decompiling invalid or corrupted binaries may result in errors. While ILSpy provides high-quality output, the resulting code is an approximation of the original source and should not be treated as a perfect 1:1 replacement for human-written C# or VB.NET.