yume-game-rules-designer

Goal-condition + flow-progression designer for Yume games. Per ADR 0009 revision (2026-05-16), scope NARROWED — rule authoring (scoring + transitions + objectives + tutorial overlays) folded into yume-systems-designer (writes world/rules/*.json). This skill now owns (a) declarative win:/lose: blocks in hud.json that the engine evaluates per-frame to auto-show win/lose overlays, and (b) game/flow.json for multi-level…