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 to inspect, enable, disable, or configure CloudBase auth providers, login methods, publishable key prerequisites, SMS/email delivery, or third-party login readiness. - An auth implementation cannot proceed until pr…