120 Prompt Patterns Tested: 8 That Actually Work for Claude Code
A user on r/ClaudeAI spent 3 months collecting and testing over 120 prompt patterns for Claude Code, sourced from Discord, GitHub, Twitter/X, and personal usage. The results are documented in a PDF cheat-sheet featuring 8 patterns that measurably changed output, plus 5 post-response validation prompts. No official Anthropic endorsement — just empirical community findings.
The 8 Patterns That Work
- L99 — Cuts hedging language like "might", "could", "I think". Place early in the prompt.
- /ghost — Removes the generic AI voice for more human-sounding output.
- OODA — Structures responses as Observe → Orient → Decide → Act. Effective for complex multi-step tasks.
- PERSONA — Specific personas outperform vague ones. Example: "Senior cloud engineer who migrated 50 companies" beats "expert".
- /noyap — Stops unsolicited enthusiasm ("Great question! Absolutely!"). Saves tokens.
- ULTRATHINK — Forces deeper reasoning. High latency but worth it for architecture decisions.
- /skeptic — Makes Claude argue against its own answer. Catches blind spots.
- HARDMODE — Adds artificial constraints. Surprisingly effective for debugging.
Validation Prompts
The author also includes 5 prompts to run after Claude responds, before using the output. Community favorite: "rate your confidence lowest-first" — reportedly cuts technical errors by ~70%.
Practical Takeaways
The patterns are empirical — mileage may vary. The PDF is dark-mode, scannable, and designed for quick reference or team sharing. The author is already planning a batch 2 based on community feedback.
For developers using Claude Code daily, these patterns offer concrete levers to control tone, depth, and reliability without relying on official documentation.
📖 Read the full source: r/ClaudeAI
👀 See Also
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