prompt-engineer

Expert prompt engineering using Claude's official best practices. Craft, analyze, optimize, and debug prompts for Claude models (Opus 4.6, Sonnet 4.5, Haiku 4.5). This skill should be used when users ask to write prompts, improve prompts, debug prompt issues, optimize system prompts, create agent instructions, or apply Claude prompting best practices. Triggers on: "write a prompt", "improve this prompt", "prompt engineering", "system prompt", "optimize prompt", "debug prompt".