Claude Opus 4.6 — Prompt Engineering Skill

This skill is the single reference for writing and tuning prompts targeting Claude Opus 4.6, Claude Sonnet 4.6, and Claude Haiku 4.5. Jump to the section that matches your situation.

1. General Principles

Be Clear and Direct

Claude responds well to explicit, specific instructions. Think of it as onboarding a brilliant but context-free new employee.

Golden rule: Show the prompt to a colleague with no task context. If they'd be confused, Claude will be too.