What is the Router Pattern in skills?

The Router Pattern organizes complex skills into a directory structure containing workflows, references, and templates, using a central SKILL.md file to direct Claude to the specific content needed for a task.

How do I ensure my Claude skill remains efficient?

This skill recommends 'Progressive Disclosure,' keeping the main SKILL.md under 500 lines and loading detailed workflows or references only when they are actively needed for the current task.

What is a Claude Code Skill?

A Claude Code Skill is a specialized, filesystem-based capability that provides domain-specific guidance, best practices, and implementation patterns to enhance Claude's behavior during specific tasks.

Why use XML tags instead of Markdown headings in skills?

XML tags provide a clear, semantic structure that helps Claude distinguish between different types of information (like objectives vs. processes) more reliably than standard markdown headings.

Claude Agent Skill Builder

Name: Claude Agent Skill Builder
Author: Eric-Ness

byEric-Ness

0•

Developer Tools

Provides expert guidance and automated workflows for designing, building, and optimizing custom Claude Code Skills.

The Claude Agent Skill Builder is a comprehensive framework designed to help developers create modular, high-performance capabilities for Claude Code. It implements a sophisticated router pattern to manage complex logic through structured workflows, domain references, and templates. By enforcing best practices such as XML-based prompting and progressive disclosure, this skill ensures that custom agent capabilities remain maintainable, efficient, and context-aware, allowing developers to extend Claude's functionality with precision and consistency.

Key Features

01Progressive disclosure management to maintain context efficiency

02XML-based prompting templates for precise agent control

03Structured router pattern for complex skill architecture

04Automated auditing and modification of existing SKILL.md files

05Pre-defined workflows for creating task-execution and domain-expertise skills

060 GitHub stars

Use Cases

01Refactoring simple one-file skills into a modular router-based directory structure

02Building a new specialized domain expertise skill for a proprietary codebase

03Auditing existing skills against official Claude Code best practices and YAML requirements

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add eric-ness/ai_notes create-agent-skills

For use in Claude.ai and ChatGPT

Download Skill