skill-creator

The skill-creator skill is a meta-skill for creating, improving, and evaluating agent skills. It solves the problem of building high-quality, reliably-triggering skills by guiding the full lifecycle: planning what a skill should do, writing SKILL.md and reference files, scoring quality against a rubric, and iterating until production standards are met. Its guiding philosophy is that a great skill is precise rather than long, with exhaustive triggers, explicit defaults, clear steps with exit gates, deferred complexity in reference files, and a structured output template.

The workflow classifies each request into Create, Improve, or Evaluate mode. Create mode gathers requirements (task, target user, tools/APIs, inputs, outputs, credentials, platform), then plans an architecture by choosing a structural pattern (Linear, Router, Methodology, Widget, or API Wrapper) and a five-to-nine step outline. A core rule is 'always dynamic, never static': skills must detect available tools, libraries, and auth at runtime and adapt via decision trees and fallback paths rather than hardcoding one method. Reference files document dynamic-calling patterns, architecture patterns, a complete YAML frontmatter guide (including environment variables, credential files, and conditional activation), a ten-dimension quality rubric, annotated skill examples, and a writing guide. It encodes patterns distilled from analyzing many production finance and agent skills.

It targets skill authors and prompt/agent engineers who want to scaffold new skills, refactor weak ones, or benchmark skill quality. It runs on Claude Code and other CLI agents (file creation requires a CLI) and on Claude.ai for evaluation and planning. It is a documentation and authoring aid with no risky operations.