vertical-9-16-layout-skill

Run `npx skills use "https://github.com/arcsin1/oh-my-ppt" --skill "arcsin1/oh-my-ppt/vertical-9-16-layout-skill"` 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/arcsin1/oh-my-ppt" that are relevant to the current task. Run `npx skills add "https://github.com/arcsin1/oh-my-ppt"` and select the relevant skills, then follow their instructions.