Rebuild or refresh a Grok skill from a live library/package tree by inventorying package.json exports, types, components, hooks, examples, tests, and docs, then writing SKILL.md + references. AUTO-RUN the global workflow update-skill when the user asks to update a skill from source, refresh a skill from packages/*, /update-skill, or "update skill X from library Y". Pass skill_name, library_root, optional focus/include_globs/examples/skill_scope/dry_run.
