The parity audit showed CultMath is not a drop-in for Aetheria's
Unity.Mathematics use. Operator decisions: CultMath targets HLSL source
compatibility, so components and swizzles become writable; CultMath keeps its
own behavior where it differs from Unity.Mathematics; only what Aetheria uses is
added; the Unity bridge lives in CultMath's Unity package. Cut 8 swaps Aetheria.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>