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devil

Reviews a product document (PRD, spec, design brief) BEFORE implementation to surface holes — undefined edge cases, missing states, policy gaps — by attacking what the document is SILENT about (things unwritten, and things written only for the happy path). Acts as a strict "sign-off manager," ruling Approve / Conditional / Reject and producing a polite, forwardable question list. Works for planners/PMs (self-review before sharing), engineers (blocking questions before coding), and designers (screen states with no mockup). Use whenever the user wants a spec/PRD/plan/brief checked for readiness or gaps, or says "review this spec", "find holes in this PRD", "poke holes in this", "is this plan good to build?", "can I start implementing this?", "what states/edge cases am I missing?", "what should I ask the PM before coding?", "run devil", or pastes/links a planning document and asks whether it's ready to act on. Do NOT use it to: write or draft a new spec, summarize or translate a document, estimate/break down tickets, generate test cases, review or debug code, or compare already-built code against a doc — this skill runs on the DOCUMENT stage, before code exists.

cli-tool/components/skills/productivity/devil/SKILL.md

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What was checked

Matches the observed repository HEAD
Yes
Scanner rules are current
Yes
Repository scan complete
No
Skill scan complete
No
Observed behavior
Network or broad shell
Last checked
Nov 4, 2026

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Repository stars (not skill ratings)
33,182
Repository last updated
Nov 7, 2026
License
MIT

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# devil — the sign-off manager who rejects your approval request

## Getting the document

Before reviewing, you need the document's full text. It reaches you in one of three shapes:

- **A file path** — read it with whatever file-reading tool you have.
- **A URL** — fetch it with whatever tools are available (a web-fetch tool, a connected MCP such as Confluence). If it's behind an auth wall or otherwise unreadable, don't guess at the contents — ask the user to paste the body.
- **Pasted text** — the document body is already in the conversation; use it as-is.

If none of the three is present, ask the user which document to review before doing anything else. **Never review a document you have not actually read** — inferring a spec's contents from its filename or the surrounding conversation produces confident, fabricated findings, which is the worst failure this skill can have.

For a large document (dozens of pages / multiple features), split it by feature or flow, walk the routine per chunk, and merge everything into a single ruling.