craft-model-statelisted

# Skill: Craft Model State > "States are not strings. They are behavior." ## The Standard 1. **Abstract Base**: One per entity. Defines `config()` with transitions. 2. **Concrete States**: One class per state. Behavior lives here. 3. **Custom Transitions**: Side effects in transition classes, not models. 4. **Co-location**: `Domain/Entity/States/`, not `App/States/`. ## The Anti-Patterns | ❌ Don't | ✅ Do | Why | |----------|-------|-----| | Enum for stateful behavior | State classes | Behavior belongs with state | | Transitions in model | Custom transition classes | Single responsibility | | Fat abstract state | Thin base, behavior in concrete | Each state is unique | ## Real-World Examples See [examples.md](examples.md).