Write a SKILL.md that the Ethos universal scanner will accept. Covers the frontmatter contract (name, description, version, tags, required_tools, ethos extension block), the body shape (When to use / Workflow / Anti-patterns), and the common rejection reasons (missing fields, unreachable tools, category drift).
$npx -y skills add ethosagent/ethos --skill ethos-skill-authoringInstalls into the current project.
Run `npx skills use "https://github.com/ethosagent/ethos" --skill "ethosagent/ethos/ethos-skill-authoring"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/ethosagent/ethos" that are relevant to the current task. Run `npx skills add "https://github.com/ethosagent/ethos"` and select the relevant skills, then follow their instructions.