When you're worldbuilding religions that need to feel like they actually evolved rather than being bullet points on a wiki, this walks you through ten foundational principles (experiential foundation, ecological integration, social cohesion) and then breaks down parameters across cosmology, divine nature, rituals, ethics, and social integration. It's structured around how real belief systems form and change, so you get questions like "what's your orthopraxy-orthodoxy balance?" instead of just "does your religion have a heaven?" The tables give you concrete options to mix and match. Honestly most useful when you need your fictional religion to drive actual plot and character motivation rather than just provide set dressing.
npx skills add https://github.com/jwynia/agent-skills --skill belief-systems