Agent Skills: publish-skill

This skill should be used when publishing a new or updated skill to the claude-skills-site Astro website. Use this skill for both adding new skills AND updating existing ones on the site. Triggers on "/publish-skill skillname", "add skill to site", "publish skillname to skills site", "update skill on site", "edit skill on site", "sync skill to site", "republish skill". Reads SKILL.md from the skills repo, generates MDX frontmatter and body, picks the right bundle, updates bundle skills array, and commits/pushes both repos. For existing skills, pass --update to preserve apothecary_name, hero_image, and activity data while regenerating the rest. A hero image is generated by default (pass --no-image to skip).