How does Claude decide when to activate a skill?

Activation is based entirely on the skill's description. The Skill Engineering framework emphasizes a specific 'What it does + When to invoke' formula to ensure high-leverage triggering.

Why is the SKILL.md file structure important?

Standardized structures ensure Claude can efficiently parse frontmatter, understand the skill's scope, and load relevant reference documentation only when needed to save context window space.

What are the best practices for writing skill instructions?

Effective instructions use imperative voice, clear XML tags for structure, specific output format requirements, and few-shot examples (input/output pairs) to guide the AI's behavior.

What is a Claude Code Skill?

A Claude Code Skill is a specialized prompt template stored in a SKILL.md file that extends Claude's capabilities with domain-specific expertise, instructions, and best practices.

Skill Engineering

Name: Skill Engineering
Author: xobotyi

byxobotyi

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開発者ツール

Streamlines the creation, optimization, and debugging of custom Claude Code skills using standardized prompt engineering patterns.

Skill Engineering is a specialized utility designed to help developers architect high-quality Claude Code skills by providing a structured framework for description triggering and instruction design. It guides users through the entire lifecycle of a skill—from initial drafting and frontmatter configuration to advanced debugging and iteration—ensuring that custom capabilities are both highly discoverable by Claude and performant in execution. By enforcing best practices like XML tagging, imperative voice, and few-shot prompting, it transforms raw prompts into robust, domain-specific extensions for the Claude Code ecosystem.

主な機能

01Integrates advanced prompt engineering techniques including XML structuring

02Standardizes SKILL.md structure, frontmatter rules, and directory patterns

03Includes a Route to Reference system for managing complex multi-file skills

04Provides debugging routes for activation failures and script errors

05Optimizes skill descriptions for precise trigger activation and discovery

060 GitHub stars

ユースケース

01Scaling simple prompts into complex, multi-agent skill structures with sub-scripts

02Auditing and refining existing skills to improve their reliability and performance

03Developing a custom domain-specific skill for a proprietary codebase or workflow

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add xobotyi/cc-foundry skill-engineering

For use in Claude.ai and ChatGPT

Download Skill