This builds fictional economies from ten core principles like resource distribution, production organization, and center-periphery dynamics. You get a structured parameter system covering everything from labor organization and currency types to seasonal cycles and environmental constraints. It includes economic system typologies from hunter-gatherer to post-scarcity, plus setting-specific adaptations for fantasy, sci-fi, and historical worlds. The approach is thorough but rigid. You're essentially filling out an economic worksheet rather than discovering emergent patterns. Works best when you need a comprehensive checklist to audit your worldbuilding, less useful if you want organic economy design that flows from your story's needs.
npx skills add https://github.com/jwynia/agent-skills --skill economic-systems