When you need to work through the second and third order effects of a speculative change, this gives you a structured framework for tracing consequences across economic, social, cultural, and political domains. It's built around the idea that good worldbuilding isn't about the cool tech or magic system, it's about the traffic jams those create. The layered approach from direct impacts through cultural evolution helps you avoid the common trap of dropping in a big change without thinking through how it reshapes power structures, creates new slang, or gets exploited by different groups. Works well for alternate history, new technologies, or any setting where you need realistic systemic ripples instead of just set dressing.
npx skills add https://github.com/jwynia/agent-skills --skill systemic-worldbuilding