What problem does it solve? Happy-path-only designs leave builders inventing error, empty, loading, and edge states at midnight. This Skill runs a systematic four-pass sweep over every flow so each state is either designed or explicitly ruled out with a written reason. ## Core Features & Use Cases - Four-pass state sweep: For every flow, it checks error, empty, loading, and edge states using scenario Givens, flow transitions, and schema nullability as sources of truth. - Designed-or-ruled-out outcomes: Every state found gets exactly one of two outcomes — designed in the hi-fi artefact, or ruled out with a documented reason — so silence never becomes a builder's guess. - Handoff integration: The completed state list feeds the design-lead coverage verdict and the state class in the design-handoff artefact for builders. - Use Case: After finishing hi-fi screens for a checkout flow, run the sweep to catch the offline-mid-payment case, the empty cart first-run view, and the slow-inventory loading state before handoff. ## Quick Start Ask the agent to sweep the states for the current flow and design or rule out each error, empty, loading, and edge case.
