Skill

skill-builder

Creates Claude Code skills with best practices for structure, validation, and testing. Useful when designing or refining skills, prompts, references, or supporting files.

Markdown

developer-tools

Install

npx claudepluginhub existential-birds/beagle --plugin beagle-core

Tool Access

This skill uses the workspace's default tool permissions.

Preview

Create, validate, and refine Claude Code skills.

Supporting Assets

references/skill-builder-guide.md

SKILL.md

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Stats

Parent Repo Stars46

Parent Repo Forks5

Last CommitMar 30, 2026

Actions

View Source View Plugin View on GitHub View README

Skill Builder

Create, validate, and refine Claude Code skills.

Quick Start

Gather the capability, triggers, and required domain knowledge.
Choose a simple single-file skill or a multi-file skill with references.
Write SKILL.md with concise, trigger-focused instructions.
Add reference files only for detail that would otherwise bloat SKILL.md.
Validate YAML frontmatter, file layout, and naming.
Test the skill with the natural language users are likely to say.

Workflow

Start with requirements and scope control.
Design the structure before writing content.
Keep descriptions in third person and include trigger keywords.
Use progressive disclosure for long examples, templates, and validation details.

Validation

Keep SKILL.md under 500 lines.
Prefer one-level reference links.
Avoid time-sensitive guidance.
Confirm frontmatter is valid YAML.
Check that any allowed-tools entries are necessary and correct.

Advanced Reference

For the full workflow, templates, examples, and validation checklist, see references/skill-builder-guide.md.