Convierte una spec aprobada en specs/NNN/plan.md (módulos, datos, contrato, decisiones y estrategia de tests) y specs/NNN/tasks.md (tareas pequeñas en orden, cada una con sus RF y un "Hecho cuando" verificable). Usar después de aprobar la spec. Sin código.
Install
npx skills add ad1code/sdd-harness --skill sdd-plannpx skills add ad1code/sdd-harness --skill sdd-plan -a claude-code -gnpx skills add ad1code/sdd-harness --skill sdd-plan -a codex -ggemini skills install https://github.com/ad1code/sdd-harness.git --path skills/sdd-plangh skill install ad1code/sdd-harness sdd-plangit clone --depth 1 https://github.com/ad1code/sdd-harness /tmp/ad1code__sdd-harness
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/ad1code__sdd-harness/skills/sdd-plan ~/.claude/skills/sdd-plan # Claude Code
cp -R /tmp/ad1code__sdd-harness/skills/sdd-plan ~/.agents/skills/sdd-plan # Codex, Cursor, Gemini CLI, Copilot, OpenCode