oaustegard/claude-skills · plugins/ai-and-reasoning/skills/challenging/SKILL.md

challenging skillA

challenging is agent-read markdown (skill) from oaustegard/claude-skills: Cross-context adversarial review for deliverables before shipping. Use when producing blog posts, technical recommendations, analysis briefs, code, or any artifact where accuracy matters more than speed. Triggers on "challenge this", "review before shipping", "adversarial pass", "stress test this"..

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 oaustegard/claude-skills/challenging@v0.12.0
Exact content
mdr add oaustegard/claude-skills/challenging@sha256:8a7d56e03e107384

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_vmq6gmnzhaaagc3i.svg)](https://markdownregistry.com/a/art_vmq6gmnzhaaagc3i)

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Versions

versioncommittedcommitsizeaudit
v0.12.0 latest2026-09-03 9623f81 13,679 BA view · diff
v0.11.02026-07-25 4b31e7d 13,531 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 (13679 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

oaustegard/claude-skills · 147 stars · license MIT · pushed 2026-09-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_vmq6gmnzhaaagc3i
GET https://markdownregistry.com/api/v1/resolve?ref=oaustegard/claude-skills/challenging
GET https://markdownregistry.com/api/v1/blob/8a7d56e03e107384b873a591ce847609e01caefcf0bd472b6cf7a13cc06b2460