yume-economy-designer

Numeric balance + resource flow designer for Yume games. Reads GDD + world plan (+ optional combining-design.md) and produces economy-design.md with explicit sources/sinks per resource, conversion ratios, currency design, pricing curves, pacing math, and adversarial balance checks. Owns the question "do the numbers work?" — catches degenerate strategies, money pumps, and progression cliffs at design time instead of…