What is a Claude Code Skill?

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

What is the Agent Skills specification?

It is an open format for defining agent capabilities supported by Claude Code, Cursor, and other AI tools to ensure cross-platform compatibility and standardized behavior.

How does Skill Authoring help with token limits?

It implements progressive disclosure, keeping the core instructions focused while moving technical details to reference files that are only loaded into the context window when specifically needed.

Where are the created skills stored?

Skills can be stored globally in ~/.claude/skills/ for personal use or locally within a project directory at .claude/skills/ for team collaboration.

Can I restrict tools for specific skills?

Yes, this skill helps you implement the experimental allowed-tools field in the YAML frontmatter to limit an agent's access to specific functions like Bash, Read, or Edit.

Skill Authoring

Name: Skill Authoring
Author: galligan

bygalligan

•

Productivity & Workflow

Automates the creation and management of standardized Agent Skills for Claude Code following the official Agent Skills specification.

Skill Authoring provides a structured framework for building, updating, and validating specialized capabilities for Claude Code and other agentic platforms. It ensures strict adherence to the Agent Skills specification by managing complex YAML frontmatter, optimizing token efficiency through progressive disclosure, and supporting diverse formats ranging from simple markdown files to complex script-based utilities. This skill is essential for developers who need to extend Claude's behavior with domain-specific logic, custom tool restrictions, and consistent implementation patterns.

Key Features

01Integrated validation using the skills-ref library and naming conventions

02Automated YAML frontmatter generation and validation for skill metadata

03Token optimization via progressive disclosure and resource management

041 GitHub stars

05Support for simple, multi-file, and script-based skill architectures

06Pre-built templates for tool-restricted and multi-file agent capabilities

Use Cases

01Bootstrapping a new project-specific skill using the --create-skill flag

02Implementing security guardrails by defining tool-restricted skill environments

03Refactoring monolithic agent instructions into structured, multi-file skills

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add galligan/skillstash skills-authoring

For use in Claude.ai and ChatGPT

Download Skill