fifteen-factor-app

This skill should be used when planning SaaS application architecture, creating PRPs or PRDs, designing cloud-native applications, evaluating application designs against best practices, or discussing microservices architecture. Provides the Fifteen-Factor App methodology - an extension of the original Twelve-Factor App principles with three additional factors for modern cloud-native applications (API First, Telemetry, Security). Trigger when users mention "fifteen factor", "12 factor", "SaaS architecture", "cloud-native design", "application architecture", "microservices best practices", or are in a planning/architecture session.

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