Sibling skills (local only) Sibling CloudBase skills ship beside this skill. Use local relative paths such as . If a referenced sibling skill file is missing from this environment, ask the user to install the full CloudBase plugin (or the missing skill). Do not HTTP-fetch remote skill or protocol markdown into the agent context. Activation Contract Use this first when - The task is a CloudBase Web login, registration, session, or user profile flow built with and the auth provider setup has already been checked. Read before writing code if - The user needs a login page, auth modal, session han…