😈 Abogado del Diablo (Devil's Advocate)

The skill that turns Claude against you and tears your idea apart.

English · Español

A Claude Code skill (and plugin) that takes on the role of a hostile devil's advocate: it grabs your idea, plan, pitch, or an entire project and critiques it hard — no validation, no softening — until it hands you a blunt verdict with a prioritized list of what to fix first.

Built by the tododeia community. Full guide (Spanish): tododeia.com/community/abogado-del-diablo

Why it exists

By default, Claude tends to agree with you. It validates, softens, and finds the upside in everything. That feels good and ruins decisions. When you're about to bet time, money, or your reputation, you don't need "wow, great idea" — you need someone to find the cracks before the market does.

This skill is that someone. It assumes your idea will fail and sets out to prove it — not out of cruelty, but because every crack it finds here is one you no longer discover late and expensive.

What it does

• Bans flattery. No compliments, no "it has potential, but…".
• Attacks across eight angles: false assumptions · market · competition · viability · numbers · execution · pre-mortem (how it dies in 12 months) · blind spot.
• Researches real-world failures of similar ideas (when web tools are available).
• Analyzes whole projects in Claude Code (reads your files) and can fan out subagents in parallel, one per angle, for a deep demolition.
• Ends constructive: blunt verdict → cracks by severity → the one that kills it → what to fix first. Brutal to the idea, never to you.

Install

Option A — Claude Code plugin (recommended)

Inside a Claude Code session:

/plugin marketplace add Hainrixz/abogado-del-diablo
/plugin install abogado-del-diablo@abogado-del-diablo

Then invoke it with /abogado-del-diablo.

Option B — Manual skill

Copy skills/abogado-del-diablo/ into ~/.claude/skills/ (or .claude/skills/ inside your project). Or download SKILL.md and drop it at ~/.claude/skills/abogado-del-diablo/SKILL.md.

Option C — No install (chat / Cowork)

Paste the contents of SKILL.md as the first message in claude.ai or Cowork, then your idea below it. Same devil's advocate, nothing to install.

Usage

/abogado-del-diablo

I want to launch a healthy-snack subscription box at $25/month.

Other forms:

• Whole project: /abogado-del-diablo --proyecto
• Deep demolition (subagents): /abogado-del-diablo --demolicion
• Natural language: "tear this idea apart, no filter", "tell me why it'll fail", "red team this".

The skill responds in the user's language (Spanish by default, since it's built for a Spanish-first community).

What you get

VERDICT
This isn't a startup, it's a grocery-margin business dressed up as tech, and the
numbers don't add up from day one. Four cracks, deadliest first:

1. The economics don't close — that's problem number one.
   - The hit: ...
   - Why it's lethal: ...
   - What would have to be true: ...
...

THE ONE THAT KILLS IT
Unit economics.

IF YOU INSIST, FIX THIS FIRST
1. ...

Full example in skills/abogado-del-diablo/references/ejemplos.md.

Structure

abogado-del-diablo/
├── .claude-plugin/{marketplace.json, plugin.json}
├── commands/abogado-del-diablo.md          # the slash command
├── skills/abogado-del-diablo/
│   ├── SKILL.md                            # the skill's brain
│   └── references/{angulos.md, ejemplos.md}
└── SKILL.md                                # copy for download / direct paste

License

MIT. Use it, modify it, share it.

Built by tododeia and maintained by @Hainrixz. Not affiliated with Anthropic. If it saved you from a bad decision, drop a ⭐ and pass it to someone who needs the truth.