Agent skill

Dotnet Decompiler

by ptn1411 in ptn1411/skill

Automated .NET/C decompilation and security analysis. An agent skill from ptn1411/skill.

No licenceAuto-check: notesSecurity

Install Dotnet Decompiler

skills CLI
$ npx skills add ptn1411/skill --skill dotnet-decompiler -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ptn1411/skill dotnet-decompiler --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ptn1411/skill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/dotnet-decompiler .claude/skills/dotnet-decompiler && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
dotnet-decompiler
GitHub stars
219
Token cost
~929 tokens
SKILL.md length
218 words
Files
4 (incl. scripts, references)
Skills in repo
22
Repo updated
First seen
Licence
None found

At a glance

Automated .NET/C decompilation and security analysis. An agent skill from ptn1411/skill.

  • Works in 4 steps: Authorization & Routing → Detect .NET and Obfuscator → Decompile → …
  • Tasks that involve Reverse engineering and malware
  • SKILL.md covers 0. Authorization & Routing, How .NET Works, Step 1 — Detect .NET and… and Step 2 — Decompile, plus 4 more sections
  • Runs Python scripts from its folder; calls python and dotnet

What it does

Dotnet Decompiler is an agent skill from ptn1411/skill. Automated .NET/C decompilation and security analysis. Uses ilspycmd for batch decompilation with manual IL fallback. Detects obfuscators (ConfuserEx, .NET Reactor, Babel) and scans for license logic, API keys, and protection patterns.

Its SKILL.md is about 930 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts and reference files (for example `references/dotnet_protections.md`, `scripts/analyze_dotnet.py` and `scripts/decompile_dotnet.py`).

It sits in Security, covering Reverse engineering and malware. It works with .NET and C#. The repository describes itself as: Bộ công cụ và tập hợp skill hỗ trợ phân tích phần mềm, khôi phục cấu trúc nguồn ở mức cần thiết, rà soát bảo mật, kiểm tra phụ thuộc và xây dựng kế hoạch khắc phục cho các hệ…

When your agent uses it

  • Tasks that involve Reverse engineering and malware

Example prompts

  • “/dotnet-decompiler”

Requirements

  • Python 3
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Authorization & Routing
  2. Detect .NET and Obfuscator
  3. Decompile
  4. Analyze

What it can do on your machine

Read from SKILL.md and the folder at commit ce2b65e. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Glob
    • Grep
    • Bash

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 2 files in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python
    • dotnet

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Dotnet Decompiler loads about 929 tokens when it runs, and up to ~1.5k if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 218 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~63
When it runs · the whole SKILL.md, loaded when a task matches
~929
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Write, Edit, Glob, Grep, Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 218 words (~929 tokens).

name
dotnet-decompiler
allowed-tools
Read, Write, Edit, Glob, Grep, Bash

Read the full SKILL.md on GitHub

Files

SKILL.md and 3 other files (scripts, references) in dotnet-decompiler of ptn1411/skill.

  • SKILL.md
  • references/dotnet_protections.md
  • scripts/analyze_dotnet.py
  • scripts/decompile_dotnet.py

Open the folder on GitHubat commit ce2b65e

Compare with similar skills

Dotnet Decompiler next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Dotnet Decompiler compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Dotnet Decompiler this skillptn1411/skill219—~929Automated safety check: NotesNone
Nes Decompilejonathanpeppers/dotnes780—~1.6kAutomated safety check: PassMIT
Scaffoldingdotnet/efcore15k—~165Automated safety check: PassMIT
Dotnet Inspect Decompilerrichlander/dotnet-inspect151—~2.4kAutomated safety check: PassNone
Ctf Malwareljagiello/ctf-skills3.4k1 repos~2.1kAutomated safety check: NotesMIT
Patch Diff AnalyzerHacktronAI/skills115—~2.2kAutomated safety check: PassMIT

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Works with

Categories

Questions about Dotnet Decompiler

What does Dotnet Decompiler do?

Automated .NET/C decompilation and security analysis. An agent skill from ptn1411/skill. Dotnet Decompiler is an agent skill from ptn1411/skill.NET/C decompilation and security analysis.

When should I use Dotnet Decompiler?

Dotnet Decompiler fits situations like: tasks that involve Reverse engineering and malware.

How do I install Dotnet Decompiler in Claude Code?

Run `npx skills add ptn1411/skill --skill dotnet-decompiler -a claude-code`. Or copy the skill folder (dotnet-decompiler in ptn1411/skill) into .claude/skills/dotnet-decompiler in your project. Claude Code loads it when a task matches its description.

How do I install Dotnet Decompiler in Codex?

Run `npx skills add ptn1411/skill --skill dotnet-decompiler -a codex`. Or copy the skill folder (dotnet-decompiler in ptn1411/skill) into .agents/skills/dotnet-decompiler in your project. Codex loads it when a task matches its description.

Can I use Dotnet Decompiler in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ptn1411/skill --skill dotnet-decompiler -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dotnet-decompiler, .gemini/skills/dotnet-decompiler, .github/skills/dotnet-decompiler and .opencode/skills/dotnet-decompiler in your project.

What does Dotnet Decompiler need to run?

Going by SKILL.md and its folder, Dotnet Decompiler needs Python for the scripts in its folder and the command-line tools its instructions call (python and dotnet). Our summary lists: Python 3. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash.

Does Dotnet Decompiler access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Dotnet Decompiler safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Dotnet Decompiler use?

No licence was found for Dotnet Decompiler or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Dotnet Decompiler use?

About 929 tokens (SKILL.md is roughly 3.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 527 tokens, read only when the agent opens those files.

What are the alternatives to Dotnet Decompiler?

Skills that share tags, products or a category with Dotnet Decompiler: Nes Decompile (jonathanpeppers/dotnes, 780 stars), Scaffolding (dotnet/efcore, 15k stars), Dotnet Inspect Decompiler (richlander/dotnet-inspect, 151 stars) and Ctf Malware (ljagiello/ctf-skills, 3.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Dotnet Decompiler?

ptn1411 (a GitHub user) maintains it in ptn1411/skill, which has 219 GitHub stars. The repository holds 22 skills in this directory. The repository was last updated on September 22, 2026.

Source: ptn1411/skill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.