moai-workflow-gan-loop

Implements the Builder-Evaluator GAN loop for iterative design quality improvement. Absorbed from the retired v2.x design constitution Section 11 and Section 12 (per the design constitution absorption policy). Integrates Sprint Contract Protocol, 4-dimension scoring, stagnation detection, and Evaluator Leniency Prevention.

All loop parameters are read from .moai/config/sections/design.yaml. Do not hardcode thresholds.