Modalities AetherMixin contributes to the sensorium when
active. PerceptionApi.sensorium walks active mixins and
unions their _grantsModalities; combined with the BodyPlan
organ walk, this is how an implant-bearing Avatar gains the
ESP modalities (no native ESP organ in v1).
R2.x live-ref cleanup on the host side. When an attuned host destructs (Avatar logout), its hosted updates are host-bound — destroy each. Clears each update's back-ref first so the update's own cleanup doesn't re-enter this (being-destroyed) host. No command-delta is fired — the host's recency stack dies with it.
Augment-gated marker: AetherMixin is composed natively on every Avatar (so methods + state exist) but is inert unless an installed augment confers it. The AetherImplant (
/lib/augmentation/AetherImplant) is the v1 conferrer;MixinApi.getActiveMixinsreflects implant presence in real time.