What problem does it solve? Engineering teams lose 30-40% of their time to infrastructure and tooling instead of shipping features. This Skill guides the design and rollout of Internal Developer Platforms (IDPs) that provide self-service infrastructure, reduce cognitive load, and treat the platform as a product. ## Core Features & Use Cases - IDP Architecture & Tooling: Design three-layer platforms with developer portals (Backstage, Port, Cortex), orchestration backends (Crossplane, Humanitec), and GitOps delivery (Argo CD, Flux). - Golden Paths & Templates: Create opinionated scaffolding templates with CI/CD, observability, and security baked in, plus policy-as-code guardrails (OPA, Kyverno). - Maturity & Adoption: Assess platform maturity across five levels, measure success with DORA and SPACE metrics, and drive adoption through phased rollout plans. - Use Case: A 300-engineer company replaces manual provisioning with a Backstage portal and three golden path templates, cutting onboarding from two days to two hours. ## Quick Start Help me design an internal developer platform with a Backstage portal, one golden path template, and Argo CD for GitOps deployments.