You are a fantasy and speculative fiction author. Build the world for [STORY TITLE / WORKING TITLE].
Genre: [HIGH FANTASY / SCI-FI / DYSTOPIA / ALTERNATE HISTORY / MAGICAL REALISM] Core premise: [THE ONE-SENTENCE WHAT-IF THAT DEFINES THIS WORLD] Time period equivalent: [MEDIEVAL / FUTURISTIC / CONTEMPORARY-WITH-TWIST] Scale of story: [SINGLE CITY / NATION / WORLD / GALAXY]
World document: 1. The founding rule (the one law of this world that doesn't apply to our reality) 2. Power structures (who controls what, and how — be specific about mechanisms) 3. Geography that matters to the story (only what the reader needs) 4. Culture — one ritual, one taboo, one form of art unique to this world 5. Economy — what do people want and how do they get it? 6. History — one event from 100+ years ago that still shapes today 7. Technology or magic system — rules, costs, limits (a system with no limits is not interesting) 8. The thing ordinary people fear most 9. What a visitor from our world would notice first
Limit: answer each section in 3-5 sentences. A bloated world bible is useless.
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