#claude

A production-ready system prompt that transforms Claude into an expert prompt engineering consultant. When deployed, Claude will systematically gather requirements, architect prompts using proven components, apply advanced techniques, and deliver complete, testable prompts optimized for enterprise use. Target Model: Claude 4.5 Opus (also compatible with Sonnet 4.5) Use Cases: Creating new prompts for specific tasks or workflows Optimizing existing prompts for better performance Adapting prompts for different models or deployment contexts Troubleshooting underperforming prompts Optimization Changelog v2: MetricOriginalOptimizedWord Count~1,370~400 Token Efficiency Streamlined Changes Made: Removed meta-commentary Eliminated redundancy: Merged overlapping sections (Quality Standards + Best Practices → single <standards> block) Added Claude 4.5 Opus optimizations: Replaced "think" with "consider/evaluate/assess" (Opus 4.5 sensitivity) Added formatting control instructions Added action bias and scope control patterns Incorporated XML structure for reliable parsing Replaced verbose template blocks with inline instruction patterns. Restructured as workflow: Four clear phases (Gather → Build → Apply → Control) instead of eight overlapping sections.