vibe-devil-advocate-review

vibe-devil-advocate-review is a skill for Claude Code from mracal/vibe-engineering. It costs 35 tokens per session (520 once invoked), scanned A, a copy of vibe-devil-advocate-review, MIT.

An adversarial review skill that challenges recommendations, designs, and other significant proposals from several angles.

In plain words
What is it for?
Use it before shipping a major recommendation or design document, or when you need a second opinion about its consistency, completeness, actionability, alignment, and risks.
Why use it?
A plausible plan can still be inconsistent, incomplete, hard to carry out, misaligned with the goal, or risky. This review is intended to expose those weaknesses before approval or release.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Good fit Use it before shipping a major recommendation or design document, or when you need a second opinion about its consistency, completeness, actionability, alignment, and risks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mracal/vibe-engineering/devil-advocate-review
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add mracal/vibe-engineering --skill devil-advocate-review
Clone the repo
git clone --depth 1 https://github.com/mracal/vibe-engineering

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for vibe-devil-advocate-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/mracal/vibe-engineering/devil-advocate-review/github.svg)](https://agentmods.dev/skills/mracal/vibe-engineering/devil-advocate-review)
Your own site
<a href="https://agentmods.dev/skills/mracal/vibe-engineering/devil-advocate-review"><img src="https://agentmods.dev/badge/skills/mracal/vibe-engineering/devil-advocate-review/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for vibe-devil-advocate-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/mracal/vibe-engineering/devil-advocate-review"><img src="https://agentmods.dev/badge/skills/mracal/vibe-engineering/devil-advocate-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 520 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00035 $0.00520
Opus 5 $0.00017 $0.00260
Sonnet 5 $0.00007 $0.00104
Haiku 4.5 $0.00003 $0.00052

Measured 10d ago against content hash a35fa3a07d68, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

vibe-devil-advocate-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to vibe-devil-advocate-review — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/devil-advocate-review/SKILL.md · 64 lines

What it actually says

vibe-devil-advocate-review

Before shipping a recommendation, challenge it. The goal is to find weaknesses BEFORE they become production incidents.

When to Use This Skill

  • Before sending a design document for approval
  • Before shipping a recommendation that combines multiple inputs
  • Before merging a large feature branch
  • When you feel "too confident" about a solution
  • User asks for a review or second opinion

When NOT to Use This Skill

  • Trivial changes (typo fixes, formatting)
  • When the user explicitly says "just ship it"
  • During brainstorming (don't kill ideas before they form)
  • For code review of small PRs (use vibe-quality-loop instead)

The 5 Dimensions

Challenge the work across:

  1. Consistency — Do all parts agree with each other? Are there contradictions?
  2. Completeness — What's missing? What edge cases are unaddressed? What blind spots exist?
  3. Actionability — Is every recommendation concrete and measurable? Can someone actually do this?
  4. Alignment — Does this match the stated goals, constraints, and user needs?
  5. Risk — What could go wrong? What are the second-order effects? What's the blast radius of failure?

Steps

  1. Read the artifact thoroughly — don't skim
  2. For each dimension, actively try to find problems. Assume there ARE problems.
  3. Score each dimension 1-5 (1=critical issues, 5=solid)
  4. List specific issues with evidence
  5. Deliver verdict: APPROVE / REVISE (with required changes) / REJECT (with blocking issues)

Output Format

Devil's Advocate Review

Dimension Score Issues Found
Consistency X/5 [count]
Completeness X/5 [count]
Actionability X/5 [count]
Alignment X/5 [count]
Risk X/5 [count]

Critical Issues

  1. [Issue with evidence]

Warnings

  1. [Non-blocking concern]

Verdict: APPROVE / REVISE / REJECT

[Rationale]

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 64 lines · 35 tokens per session scan A a35fa3a07d68

Subscribe to this mod's changes

vibe-devil-advocate-review is a skill published in the GitHub repository mracal/vibe-engineering (3 stars, last pushed yesterday), licensed MIT. It adds 35 tokens to every session and 520 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to vibe-devil-advocate-review, differing in 0 lines, and is treated as a copy.