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Skill Builder

rysweet/amplihack

If you're building Claude Code extensions or Agent Skills, this walks you through the complete workflow from clarification to validation. It references the actual specifications at agentskills.io and Anthropic's authoring best practices, then generates compliant SKILL.md files with proper frontmatter. The progressive disclosure guidance is solid: it explains what to load at startup versus on activation versus on demand. What I like is the blunt conciseness advice, challenging every paragraph to justify its token cost and keeping bodies under 500 lines. It also catches common mistakes like using deprecated frontmatter fields or writing time-sensitive content that goes stale.

skills.sh installs
227
GitHub stars
76
last updated
Aug 21, 2026
View on GitHub

Install

$ npx -y skills add rysweet/amplihack --skill skill-builder --agent claude-code

Installs into .claude/skills of the current project.

Files

Skill Builder

Purpose

Creates production-ready Agent Skills following the official specifications and best practices.

When I Activate

I automatically load when you mention:

  • "build a skill" or "create a skill"
  • "generate a skill" or "make a skill"
  • "design a skill" or "new skill"

Authoritative References (Read These First)

Before creating any skill, read the current versions of these docs:

  1. Agent Skills Specification (the open standard): https://agentskills.io/specification
  2. Skill Authoring Best Practices (Anthropic): https://platform.claude.com/docs/en/agents-and-tools/agent-skills/best-practices
  3. Claude Code Skills Documentation (Claude Code extensions): https://docs.claude.com/en/docs/claude-code/skills
  4. Example Skills (reference implementations): https://github.com/anthropics/skills

These are the source of truth. If anything in this skill contradicts those docs, the official docs win.

What I Do

Create skills in 5 steps:

SKILL.md on GitHub

Sponsors

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Details

Repository
github.com/rysweet/amplihack
Categories
AI & Agent Building, Skill Development
First seen
Jun 3, 2026

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