re-shell

A Nix flake-based reverse engineering environment designed for use with Claude Code. Drop in a binary, capture, or archive and ask Claude to analyze it -- the right tools and context activate automatically.

Quick start

# Enter the environment (or use direnv)
nix develop

# Drop a file into the repo root and start Claude Code
cp ~/Downloads/suspicious.exe .
claude

# Then just ask:
#   "Reverse engineer suspicious.exe"
#   "Decompile this APK and find hardcoded API keys"
#   "Analyze this HAR file for undocumented API endpoints"

How it works

The environment bundles a full reverse engineering toolchain (Ghidra, radare2, Frida, mitmproxy, YARA, and more) into a reproducible Nix dev shell. Claude Code is configured via CLAUDE.md with discipline-specific skills that auto-activate based on file type and context:

Skill	Activates on	Example files
Windows RE	PE binaries, .NET assemblies, drivers	.exe, .dll, .sys
Android RE	Android packages, DEX bytecode	.apk, .xapk
Web RE	HTTP captures, API traffic, protobufs	.har, .proto

When Claude detects relevant context, the matching skill loads specialized tool documentation and workflows -- no manual configuration needed.

Adding tools

The environment is self-modifying. If an analysis needs a tool that isn't installed, Claude can add it:

• Python packages: uv add <pkg> then direnv reload
• Node.js packages: npm install <pkg> then direnv reload
• System tools: add to flake.nix then direnv reload

Output directories

• tmp/ -- Intermediate work products (gitignored)
• artifacts/ -- Final deliverables like reports and analysis notes (gitignored)