Function glm_vision_enabled 

pub fn glm_vision_enabled() -> bool

2026-09-26: Whether GLM-5.3’s vision tower is enabled for this process (METRALE_GLM_VISION, see glm_vision_enabled_from); off by default.

The glm5_next parser (which leaves config.vision None when off) and Glm5NextWeightLoader::binds_vision_encoder both call it, so they cannot disagree.