Superpowers packages a full spec-driven methodology into installable Claude Skills, enforcing brainstorming, planning, subagent-driven implementation, and strict TDD instead of leaving that structure up to you. Most Claude Code SDD setups fail the same way: someone writes a solid specify-plan-implement skill once, uses it diligently for a week, then quietly drifts back to unstructured prompting the first time a deadline gets close. Nothing in a hand-rolled skill actually stops that. Superp...