Home takeover
home_takeover_enabled: gates a full-screen or prominent homepage takeover/banner.home_takeover_animation_enabled: gates motion/animation on the takeover element.
Rollout system
rollout_policy: selects which rollout rule set is active.rollout_version: pins the specific rollout version being served.
Unavailable-feature upsell
unavailable_upsell_policy: controls the upsell behavior when a feature is unavailable.unavailable_upsell_show_upgrade_cta: toggles display of an upgrade button in the upsell.
Voice UI
voice_model_picker_available: enables the model selector inside voice mode.