What problem does it solve? Backend projects often lack consistent architectural rules, leading to scattered business logic, missing authorization checks, unsafe error handling, and untestable code. This Skill gives a Technical Product Owner Agent a complete, reusable rulebook for planning, specifying, and reviewing backend work. ## Core Features & Use Cases - Layered Architecture Rules: Defines API, Application, Domain, Infrastructure, and Observability layers with clear responsibilities and forbidden behaviors for each. - Security & Validation Checklists: Covers authentication, object-level authorization, input validation, structured errors, idempotency, transactions, and secrets handling. - Task & Review Templates: Provides a ready-to-use backend task template for AI developer agents and a review checklist covering tests, observability, and production readiness. - Use Case: When planning a new feature like a payments module, use this Skill to generate a task specification with API contracts, authorization rules, idempotency requirements, and acceptance criteria, then review the implementation against the checklist. ## Quick Start Ask the agent to plan the backend architecture and task specification for a new feature using the backend architecture guidelines.