sprint-plan

MUST use when user describes a multi-step feature to build, says 'let's build', 'new project', 'let's implement', or when a task clearly requires more than 3 steps and no plan exists yet. Do NOT trigger for simple additions like adding a comment, renaming a variable, or single-file changes. Produces: task breakdown with S/M/L/XL size estimates, dependency ordering, risk analysis, and a Definition of Done checklist;…