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Use when a plan or design needs assumptions, constraints, and decision branches resolved before progressing.
The review-first prompt is selected by default. You can switch to a direct command or download a local copy.
Read SKILL.md and any companion files shown by SkillsMP before deciding whether to install.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
A direct command skips the review prompt. Inspect the source before running it.
npx skills add https://github.com/peel/fiddle --skill challengeThe command stays on one line. Scroll horizontally to inspect it before copying.
Prefer a local copy? Download the files currently available to SkillsMP.
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Showing SKILL.md
| name | challenge |
| description | Use when a plan or design needs assumptions, constraints, and decision branches resolved before progressing. |
Challenge every aspect of this plan or design until we reach shared understanding. Walk down each branch of the decision tree, resolving dependencies between decisions one-by-one.
If a question can be answered by exploring the codebase, explore the codebase instead of asking.
ARGUMENTS: {ARGS}
--phase discover: Read docs in docs/product/ and docs/technical/, recent beans, and any --context files. Open by synthesizing what discover-docs and external research found — present the scope as you understand it, confirm the user's intent, then challenge assumptions and constraints. Done when scope has no open branches. State "Scope is solid — ready for DEFINE" and stop.
--phase define: Read the design doc (most recent in docs/specs/), panel commentary if present, relevant source files, and any --context files. Challenge edge cases, integration points, panel dissent, failure modes, and sizing. Done when every decision branch is resolved. State "Design holds up — ready for implementation planning" and stop.
Standalone: Challenge whatever the user presents. No phase-specific framing. Done when all branches are resolved — summarize the resolved decision tree and stop.
Invoke as fiddle:challenge [--phase discover|define] [--context file1 file2].
