What problem does it solve? Building custom Claude Code Skills requires knowing the exact SKILL.md format, YAML frontmatter rules, and directory conventions—mistakes like nested directories or missing trigger conditions make skills undiscoverable. This Skill provides the complete specification, templates, and validation checklist to author working skills correctly the first time. ## Core Features & Use Cases - Complete SKILL.md Specification: Documents required YAML frontmatter fields (name, description), character limits, formatting rules, and common errors. - Progressive Disclosure Architecture: Explains the 3-level loading system (metadata, SKILL.md body, referenced files) so skills scale without context bloat. - Ready-to-Use Templates: Provides basic, intermediate, and advanced skill templates plus real-world examples for documentation and code generation skills. - Use Case: You want to build a custom skill that generates API documentation for your team. Use this Skill to scaffold the directory, write a discoverable description with trigger conditions, and validate it against the checklist before publishing. ## Quick Start Ask Claude to create a new skill called 'my-first-skill' with proper frontmatter and directory structure using the Skill Builder guidelines.
