Comprehensive guidance for the AIdev workflow system used for structured software project management with Claude Code. Covers AIdev commands (/constitution, /prd, /plan, /work, /check, /verify, /reflect, /new, /spec), file structure (spec/ directory with constitution, PRD, units), task execution with evidence-based completion, constitutional governance, quality gates, Single Source of Truth principle, Context Discipline, pre-implementation checks, task schema format, automation hooks, template management, and workflow sequences for feature planning and implementation. Use when working with spec/, creating product requirements, designing features, managing tasks, or validating project alignment.