Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
The line at the top of this page pins the label git:20260309.8902ba7, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_4xzec25xyxuwreo2
GET https://markdownregistry.com/api/v1/resolve?ref=alirezarezvani/claude-skills/challenge
GET https://markdownregistry.com/api/v1/blob/d56303f02a82e80b53a6814bcf8f03d56a8bbd853b1d76ab2aec5520f607790b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
alirezarezvani/claude-skills · c-level-advisor/executive-mentor/skills/challenge/SKILL.md · Use before committing serious resources to a plan, or when feedback has been suspiciously positive. Runs a pre-mortem…
pedrohcgs/claude-code-my-workflow · .claude/skills/challenge/SKILL.md · Stress-test a finding against the choices you did not make. Enumerates the discrete forks a competent analyst could…
oliver-kriska/claude-elixir-phoenix · plugins/elixir-phoenix/skills/challenge/SKILL.md · Challenge mode reviews - rigorous questioning before approving changes. Use when you want thorough scrutiny of Ecto…
athola/claude-night-market · plugins/gauntlet/skills/challenge/SKILL.md · Presents adaptive codebase challenge questions with multiple-choice and trace exercises. Use when testing contributor…
agentii-ai/agentii-investment-intelligence · plugins/vertical-plugins/scenarios/skills/agentii/challenge/SKILL.md · Adversarial verification of research theses — cross-run/cross-thesis contradiction via the entity index, pre-mortem…
fusengine/agents · plugins/ai-pilot/skills/challenge/SKILL.md · Use before a root-cause, done/verified claim, irreversible action, or 2nd-time fix reaches the owner (APEX or plain…
fusengine/claude-plugins · plugins/ai-pilot/skills/challenge/SKILL.md · Use before a root-cause, done/verified claim, irreversible action, or 2nd-time fix reaches the owner (APEX or plain…