System Prompt Engineering

melodic-software/claude-code-plugins

Helps you design system prompts for custom agents by walking through purpose, instructions, and examples. The key insight here is that system prompts are orders of magnitude more important than user prompts since they affect every conversation. It provides a concrete structure with three sections (purpose for identity, instructions for rules, examples for behavior shaping) and includes validation checklists. Most useful when you're creating a new specialized agent and need to think through boundaries and edge cases upfront. The examples section is emphasized as critical, which tracks with how LLMs learn better from concrete demonstrations than abstract rules.

skills.sh installs

170

GitHub stars

30

last updated

Aug 21, 2026

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