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 implementation of Internal Developer Platforms (IDPs) that provide self-service infrastructure, reduce cognitive load, and accelerate developer productivity through golden paths and platform-as-product thinking. ## 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), with build-vs-buy decision frameworks. - Golden Path Templates: Create opinionated software templates for web apps, data pipelines, ML services, event-driven microservices, and scheduled jobs with security, observability, and CI/CD baked in. - Adoption & Maturity Planning: Assess platform maturity across five levels, structure platform teams (centralized, federated, hub-and-spoke), and drive adoption with phased rollout strategies and DORA/SPACE metrics. - Use Case: A 300-engineer company deploys Backstage with three golden paths and Argo CD, cutting onboarding from 2 days to 2 hours and increasing deployment frequency from 2x/week to 10x/day. ## Quick Start Help me bootstrap an internal developer platform with Backstage, one golden path template for a Node.js web app, and Argo CD for GitOps deployments.