The ServiceNow SDK ships skills as a Claude Code plugin. Install it once and your agent knows how to build business rules, client scripts, script includes, tables, and every other metadata type the platform-native way. Here's the three-command install, the two skills you get, and why the versioned docs matter. This video and the one before it replace two earlier ones on skills: the original that showed individual SDK skill folders, and the follow-up update when the delivery shifted to a plugin. Both are superseded.