challenge is agent-read markdown (skill) from thoughtbot/rails-consultant: Pressure-test an assumption, decision, or inherited constraint — Socratic cross-examination that forces you to defend or abandon your position.
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What the file says
## Behavior
This is a conversation, not an audit. Do not produce structured output. Do not list findings upfront. Start by understanding what they actually believe — then follow the thread with one question at a time.
If you already have context — from a prior skill, from the conversation, or from something specific the user said — name the assumption you want to pressure-test and why. Then go straight to questioning. Do not ask them to restate what you already know.
If you do not have context, ask one plain question to surface the assumption before proceeding.
Ask one question at a time, following the gaps in their reasoning. The goal is to make them interrogate the assumption themselves before you weigh in. Good questions to reach for:
**On origin:**
- "Where did this belief come from — your own experience, a previous project, something you read, or something someone told you?"
- "Is this a Rails convention, or did you choose it consciously?"
- "Have you actually tested this, or is it untested instinct?"
**On necessity:**
- "What's the underlying need — if you strip away the solution, what problem must be solved?"
…
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.
GET https://markdownregistry.com/api/v1/artifacts/art_rz3qnnrm2m2p6wxj
GET https://markdownregistry.com/api/v1/resolve?ref=thoughtbot/rails-consultant/challenge
GET https://markdownregistry.com/api/v1/blob/875e0dbf4a0051921a8b7199b72ca319cced58e9339544e257c87c9cd5c54618
Your agent 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.
thoughtbot/rails-consultant · skills/explain/SKILL.md · Explain what a piece of code does — a specific file, class, or method in close detail, or a user-facing flow as a…
thoughtbot/rails-consultant · skills/feature-dev/SKILL.md · Take one new feature slice from idea to reviewed, committed code in a single guided pass — scope it into the smallest…
thoughtbot/rails-consultant · skills/git-commit/SKILL.md · Turn the working changes into one or more atomic commits with well-written messages. Use whenever the user runs…
thoughtbot/rails-consultant · skills/hard-news/SKILL.md · Prepare to deliver difficult technical news to a client — a conversational prep session before the hard conversation…
thoughtbot/rails-consultant · skills/offboard/SKILL.md · Walk through the Designer/Developer wrap-up checklist for offboarding a client engagement — conversationally, one item…
thoughtbot/rails-consultant · skills/prior-art/SKILL.md · Discover how a codebase already handles a specific concern — search broadly, find every instance, and assess…
thoughtbot/rails-consultant · skills/rubber-duck/SKILL.md · Think out loud about a problem, decision, or approach — Socratic friction to help you find clarity, not sympathy
thoughtbot/rails-consultant · skills/slice/SKILL.md · Turn a feature into well-defined, independently shippable slices — whether it's an epic that needs breaking apart or a…
thoughtbot/rails-consultant · skills/socratic-review/SKILL.md · Socratic code review and refactoring session — whether it's your own code, a teammate's PR, or something you inherited…
thoughtbot/rails-consultant · skills/standup/SKILL.md · Write a client update — identify what was done, what's next, and surface risks before they become surprises. End of…
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…
martineserios/thebrana · system/skills/challenge/SKILL.md · Adversarial review — Fable 5 stress-tests reasoning, Gemini checks knowledge. Use before plan or architecture decisions.
