GitHub Spec Kit: The Four-Stage Spec-Driven Development Workflow (/specify → /plan → /tasks → /implement)

GitHub's official open-source tool for Spec-Driven Development. Using /speckit.specify → /plan → /tasks → /implement, it turns a vague requirement into an executable specification end to end, then has the AI generate code from that spec — fixing the unpredictability of 'vibe coding.'