dotnet-decompile

dotnet-decompile is a skill for Claude Code, Codex from batteryshark/rekit. It costs 80 tokens per session (304 once invoked), scanned A, original, Apache-2.0.

A static decompiler that converts the intermediate code inside a .NET assembly back into readable C# source files. It uses ilspycmd and reads the assembly without running it.

In plain words
What is it for?
Use it to turn a managed DLL or executable into C# files for code review and reverse engineering, usually after checking its structure with a .NET analyzer.
Why use it?
It makes managed application logic easier to inspect when the original source code is unavailable. It also clearly reports when the required .NET tool is not installed.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/batteryshark/rekit/dotnet-decompile
Any agent
npx skills add batteryshark/rekit --skill dotnet-decompile
Clone the repo
git clone --depth 1 https://github.com/batteryshark/rekit

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dotnet-decompile

README.md
[![agentmods](https://agentmods.dev/badge/skills/batteryshark/rekit/dotnet-decompile.svg)](https://agentmods.dev/skills/batteryshark/rekit/dotnet-decompile)
Your own site
<a href="https://agentmods.dev/skills/batteryshark/rekit/dotnet-decompile"><img src="https://agentmods.dev/badge/skills/batteryshark/rekit/dotnet-decompile.svg" alt="Measured on agentmods" height="20"></a>
Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 304 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00080 $0.00304
Opus 5 $0.00040 $0.00152
Sonnet 5 $0.00016 $0.00061
Haiku 4.5 $0.00008 $0.00030

Measured 4d ago against content hash e05c9b5accc7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dotnet-decompile scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/run.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/dotnet-decompile/SKILL.md · 32 lines

What it actually says

.NET Decompiler

Decompile a .NET / CLR assembly (IL) back to C# with ilspycmd.

When to use

A managed .NET assembly you need to read. Run dotnet-analyze first for the shape and P/Invoke surface, then this for full C#.

What it does

Runs ilspycmd <assembly> -o <outdir> (static — reads IL/metadata, never runs the assembly) and reports the files written.

Prerequisites

  • python3 (runner) and ilspycmd on PATH — a dotnet tool that needs the .NET runtime, so it is not bundled: dotnet tool install -g ilspycmd. Until then doctor marks the skill not-ready and run reports the honest blind spot.

Usage

rekit run dotnet-decompile ./managed.dll ./out
Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 32 lines · 80 tokens per session scan A e05c9b5accc7

Subscribe to this mod's changes

dotnet-decompile is a skill published in the GitHub repository batteryshark/rekit (11 stars, last pushed 26d ago), licensed Apache-2.0. It adds 80 tokens to every session and 304 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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