Agent-Skills.md

Agent Skills: Let Fate Decide

Draws 4 Tarot cards using os.urandom() to inject entropy into planning when prompts are vague or underspecified. Interprets the spread to guide next steps. Use when the user is nonchalant, feeling lucky, says 'let fate decide', makes Yu-Gi-Oh references ('heart of the cards'), demonstrates indifference about approach, or says 'try again' on a system with no changes. Also triggers on sufficiently ambiguous prompts where multiple approaches are equally valid.

UncategorizedID: philoserf/claude-code-setup/let-fate-decide

Repository

philoserf/claude-code-setup
philoserfLicense: MIT
9

Install this agent skill to your local

pnpm dlx add-skill https://github.com/philoserf/claude-code-setup/tree/HEAD/skills/let-fate-decide

Skill Files

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skills/let-fate-decide/SKILL.md

Skill Metadata

Name
let-fate-decide
Description
"Draws 4 Tarot cards using os.urandom() to inject entropy into planning. Use when prompts are vague, the user says 'let fate decide', makes Yu-Gi-Oh references, demonstrates indifference about approach, or multiple approaches are equally valid. Interprets the spread to generate actionable next steps from randomized input."

Let Fate Decide

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

Reference Files

Quick Start

  1. Run the drawing script:

    uv run --script scripts/draw_cards.py

  2. The script outputs JSON with 4 drawn cards, each with a file path relative to the skill directory

  3. Read each card's meaning file to understand the draw

  4. Interpret the spread using the guide at references/interpretation-guide.md

  5. 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:

  1. Builds a standard 78-card Tarot deck (22 Major Arcana + 56 Minor Arcana)
  2. Performs a Fisher-Yates shuffle using rejection sampling (no modulo bias)
  3. Draws 4 cards from the top
  4. 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

All 78 card meaning files live directly in assets/:

  • Major Arcana: 00-the-fool.md through 21-the-world.md
  • Minor Arcana: rank-of-suit.md (e.g., ace-of-wands.md, king-of-pentacles.md)

Interpretation

After drawing, read each card's file and synthesize meaning. See 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 Sessions

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.

User: "Should I refactor the auth module or add the new endpoint first?"

[Draw cards]
1. Nine of Swords (reversed) - Context: Anxiety about this is overblown
2. The Tower (reversed) - Challenge: A disruption is being avoided or delayed
3. Four of Swords (reversed) - Guidance: Don't rest yet — act now
4. Eight of Cups (reversed) - Outcome: Reluctance to walk away from sunk cost

Interpretation: The spread is reversal-heavy — something is being overlooked.
The worry about breaking things is exaggerated (Nine of Swords reversed), but
delaying the disruptive change is making it worse (Tower reversed). The cards
say stop hesitating (Four of Swords reversed) and don't cling to the current
auth code just because it exists (Eight of Cups reversed).

Approach: Refactor auth first. The reversed Tower says the upheaval is coming
either way — better to control it now than have it forced later.

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 |