mlx-bun library API
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    interface SkeletonItem {
        depth?: number;
        endLine: number;
        kind: SkeletonKind;
        startLine: number;
        title?: string;
    }
    Index
    depth?: number

    Heading depth (1 for h1, 2 for top-level sections).

    endLine: number
    startLine: number

    1-based inclusive line range of the region.

    title?: string

    Heading text for h1/section/see-also/notes/references items.