What problem does it solve? Learning a spec-driven development (SDD) workflow is hard when examples are toy projects disconnected from real work. This Skill teaches the full SDD cycle by executing it on the user's actual codebase, producing real artifacts and production-quality code while explaining each step. ## Core Features & Use Cases - Guided full-cycle walkthrough: Narrates all SDD phases — explore, propose, spec, design, tasks, apply, verify, archive — with short explanations of what and why at each step. - Real change selection: Scans the codebase for small, low-risk, spec-worthy improvements (missing validation, inconsistent error messages, TODO comments) and lets the user pick or suggest their own. - Real artifact generation: Creates proposal.md, delta specs with Given/When/Then scenarios, design.md, and tasks.md following the formats of the individual sdd-* skills, then implements and verifies the change. - Use Case: A developer new to SDD runs the onboarding, picks "add input validation to the signup endpoint", and ends the session with a complete archived change, updated specs, and working code. ## Quick Start Ask the orchestrator to launch the SDD onboarding walkthrough so it can scan your codebase and guide you through a complete spec-driven change from proposal to archive.