What problem does it solve? Product Backlogs often contain oversized epics and vague items that derail Sprint Planning. This Skill guides the continuous refinement activity: breaking epics into vertical user stories, validating them against INVEST criteria, estimating with story points, and enforcing a Definition of Ready so only sprint-ready items reach planning. ## Core Features & Use Cases - Epic decomposition: Split large epics into vertical, value-delivering stories using patterns like workflow steps, business rules, data variations, and CRUD operations. - INVEST validation and estimation: Check each story against all six INVEST criteria and estimate with planning poker on a Fibonacci scale, flagging anything 13+ points for further splitting. - RUP traceability: Anchor every story to a UC-XXX use case via the :uc_origen: field, inheriting acceptance criteria instead of inventing them. - Use Case: A Product Owner preparing for Sprint Planning on an e-commerce checkout epic uses this Skill to split it into cart, shipping, payment, and confirmation stories, each estimated, INVEST-compliant, and traced to its RUP use case. ## Quick Start Ask the assistant to refine the checkout epic from the Product Backlog into INVEST-compliant user stories traced to their UC use cases with story point estimates and a Definition of Ready checklist.
