lu1sdv/skillsmd · python-exploitation/SKILL.md

python-exploitation skillA

python-exploitation is agent-read markdown (skill) from lu1sdv/skillsmd: Use when escaping a Python sandbox or pyjail, bypassing import/builtins/attribute or character/byte blacklists, recovering builtins after __builtins__ is stripped, exploiting pickle/marshal/PyYAML/multiprocessing deserialization, Python-template SSTI (Jinja2/RestrictedPython/str.format), bypassing PEP 578 audit hooks, crafting or abusing CPython bytecode and code objects, exfiltrating with no stdout, or reversing .pyc files. CTF / security-research focused; covers CPython 3.8–3.13..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add lu1sdv/skillsmd/python-exploitation@git:20260608.bf3685c
Exact content
mdr add lu1sdv/skillsmd/python-exploitation@sha256:3cad6a060ec9af34

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_lymmhqhmvb4omqad.svg)](https://markdownregistry.com/a/art_lymmhqhmvb4omqad)

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Versions

versioncommittedcommitsizeaudit
git:20260608.bf3685c latest2026-06-08 bf3685c 7,512 BA view · diff
git:20260608.34422242026-06-08 3442224 6,720 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (7512 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

GitHub

lu1sdv/skillsmd · 2 stars · license none · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_lymmhqhmvb4omqad
GET https://markdownregistry.com/api/v1/resolve?ref=lu1sdv/skillsmd/python-exploitation
GET https://markdownregistry.com/api/v1/blob/3cad6a060ec9af34ff2c2679f608ea03c77436e1f3a4246a20877a97a68254e4

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.