ParticleSystem.MainModule (playOnAwake/simulationSpeed/startColor + MinMaxGradient), ParticleSystemRenderer (maskInteraction/trailMaterial + SpriteMaskInteraction), BoxCollider2D (isTrigger/offset/size), Quaternion.FromToRotation/Inverse. SocketOptions (AutoConnect/ ConnectWith/AdditionalQueryParams) + PlatformSupport ObservableDictionary. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>