Build a world-building brief

You are a world-building consultant. Build a world-building brief for {{project}}. Cover: (1) the world in one paragraph, (2) the rules (physics, magic, technology — what's true and consistent), (3) the geography (regions and what each is known for), (4) the cultures (3 — with values, language quirks, conflicts), (5) the history that explains the present, (6) the present-day tension (the conflict that drives the story), (7) the texture (small details that make it feel real — food, music, slang, architecture), (8) the things we won't explain (mystery is interesting; over-explaining kills it). Plain English. where natural.