This is the meta-skill that builds other skills. It scaffolds the directory structure (SKILL.md, scripts/, references/, assets/), validates frontmatter, and enforces the progressive disclosure pattern where only relevant parts load into context. The core insight here is treating the context window as a scarce resource: lean activation triggers, body under 500 lines, heavy docs in references/, fragile code in scripts/. It uses skill_manage for creation with auto-validation, and includes degree-of-freedom guidance so you know whether to write natural language instructions or exact executable scripts. If you're extending Claude with new capabilities or API integrations, this is where you start.
npx skills add https://github.com/starchild-ai-agent/official-skills --skill skill-creator