L

let-fate-decide

by @trailofbitsv
4.3(29)

意思決定が不明確な場合、カードドローイングスクリプトを実行し、JSON形式のドロー結果を取得して意思決定を支援します。

decision-makingrisk-managementstrategic-planningproduct-strategyuncertainty-managementGitHub
インストール方法
npx skills add trailofbits/skills --skill let-fate-decide
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Before / After 効果比較

1
使用前

チームが重要な意思決定で膠着状態に陥ったり、不確実性に直面したりすると、往々にして長時間の議論や分析に陥り、「分析麻痺」の状態になることがあります。これは時間を浪費するだけでなく、最適な意思決定の機会を逃す可能性もあります。

使用後

「運命のカード」スキルは、意思決定の膠着状態を打破するための構造化された非伝統的な方法を提供します。カードを引いて解釈することで、チームは新しい視点を得て、創造性を刺激し、より気軽な方法で意思決定を行い、過度な分析を避け、意思決定プロセスを加速させることができます。

SKILL.md

let-fate-decide

Let Fate Decide

When the path forward is unclear, let the cards speak.

Quick Start

Run the drawing script:

uv run {baseDir}/scripts/draw_cards.py

The script outputs JSON with 4 drawn cards, each with a file path relative to {baseDir}/

Read each card's meaning file to understand the draw

Interpret the spread using the guide at {baseDir}/references/INTERPRETATION_GUIDE.md

Apply the interpretation to the task at hand

When to Use

  • Vague prompts: The user's request is ambiguous and multiple valid approaches exist

  • Explicit invocations: "I'm feeling lucky", "let fate decide", "dealer's choice", "surprise me", "whatever you think"

  • Yu-Gi-Oh energy: "Heart of the cards", "I believe in the heart of the cards", "you've activated my trap card", "it's time to duel"

  • Nonchalant delegation: The user expresses indifference about the approach

  • Redraw requests: "Try again" or "draw again" when no actual system changes occurred (this means draw new cards, not re-run the same approach)

  • Tie-breaking: When you genuinely cannot decide between equally valid approaches

When NOT to Use

  • The user has given clear, specific instructions

  • The task has a single obvious correct approach

  • Safety-critical decisions (security, data integrity, production deployments)

  • The user explicitly asks you NOT to use Tarot

  • A more specific skill (like ask-questions-if-underspecified) would better serve the user by gathering actual requirements

How It Works

The Draw

The script uses os.urandom() for cryptographic randomness:

  • Builds a standard 78-card Tarot deck (22 Major Arcana + 56 Minor Arcana)

  • Performs a Fisher-Yates shuffle using rejection sampling (no modulo bias)

  • Draws 4 cards from the top

  • Each card independently has a 50% chance of being reversed

The Spread

The 4 card positions represent:

Position Represents Question It Answers

1 The Context What is the situation really about?

2 The Challenge What obstacle or tension exists?

3 The Guidance What approach should be taken?

4 The Outcome Where does this path lead?

Card Files

Each card's meaning is in its own markdown file under {baseDir}/cards/:

  • cards/major/ - 22 Major Arcana (archetypal forces)

  • cards/wands/ - 14 Wands (creativity, action, will)

  • cards/cups/ - 14 Cups (emotion, intuition, relationships)

  • cards/swords/ - 14 Swords (intellect, conflict, truth)

  • cards/pentacles/ - 14 Pentacles (material, practical, craft)

Interpretation

After drawing, read each card's file and synthesize meaning. See {baseDir}/references/INTERPRETATION_GUIDE.md for the full interpretation workflow.

Key rules:

  • Reversed cards invert or complicate the upright meaning

  • Major Arcana cards carry more weight than Minor Arcana

  • The spread tells a story across all 4 positions; don't interpret cards in isolation

  • Map abstract meanings to concrete technical decisions

Example Session

User: "I dunno, just make it work somehow"

[Draw cards]
1. The Magician (upright) - Context: All tools are available
2. Five of Swords (reversed) - Challenge: Let go of a combative approach
3. The Star (upright) - Guidance: Follow the aspirational path
4. Ten of Pentacles (upright) - Outcome: Long-term stability

Interpretation: The cards suggest you have everything you need (Magician).
The challenge is avoiding overengineering or adversarial thinking about edge
cases (Five of Swords reversed). Follow the clean, hopeful approach (Star)
and build for lasting maintainability (Ten of Pentacles).

Approach: Implement the simplest correct solution with clear structure,
prioritizing long-term readability over clever optimizations.

Error Handling

If the drawing script fails:

  • Script crashes with traceback: Report the error to the user and skip the reading. Do not invent cards or simulate a draw — the whole point is real entropy.

  • Card file not found: Note the missing file, interpret the card from its name and suit alone, and continue with the reading.

  • Never fake entropy: If the script cannot run, do not simulate a draw using your own "randomness." Tell the user the draw failed.

Rationalizations to Reject

Rationalization Why Wrong

"The cards said to, so I must" Cards inform direction, they don't override safety or correctness

"This reading justifies my pre-existing preference" Be honest if the reading challenges your instinct

"The reversed card means do nothing" Reversed means a different angle, not inaction

"Major Arcana overrides user requirements" User requirements always take priority over card readings

"I'll keep drawing until I get what I want" One draw per decision point; accept the reading

Weekly Installs360Repositorytrailofbits/skillsGitHub Stars3.7KFirst SeenFeb 26, 2026Security AuditsGen Agent Trust HubPassSocketPassSnykPassInstalled oncodex323cursor321github-copilot321opencode321gemini-cli320amp319

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統計データ

インストール数2.0K
評価4.3 / 5.0
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更新日2026年5月23日
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対応プラットフォーム

🔧Claude Code
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作成2026年3月17日
最終更新2026年5月23日