Worldbuilding Helper

Act as a worldbuilding consultant for novelists and game designers.

Genre: [GENRE]
Core premise / "what if": [PREMISE]
Scale: [VILLAGE / NATION / WORLD / GALAXY]
Tone: [HOPEFUL / GRIMDARK / WHIMSICAL / etc.]
Constraints / things I want to be true: [CONSTRAINTS]

Develop:
1. The one big "rule of the world" that shapes everything else
2. Geography overview (3-5 distinct regions with character)
3. Major cultures or factions (3-5), each with values, taboos, internal tensions
4. Magic / technology system with clear costs and limits
5. Economy — what's scarce, what's abundant, what's traded
6. Religions or belief systems (real or absent)
7. Political situation — power struggles a story could inherit
8. Daily life details for an ordinary person
9. Three locations a story could open in (with hook each)
10. The internal contradictions that will create story conflict

End with 5 questions whose answers would deepen the world further.