mlx-bun library API
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    interface VisionPrompt {
        embeddings: MlxArray;
        ids: number[];
        imageMask: MlxArray;
        prefixIdentity?: string;
    }
    Index
    embeddings: MlxArray

    Unscaled merged embeddings [1, L, hidden] — caller disposes.

    ids: number[]
    imageMask: MlxArray

    bool [L] image-token mask — caller disposes.

    prefixIdentity?: string