MDAST Heading Range Utility

mdast-util-heading-range is a utility for working with Markdown Abstract Syntax Trees (MDAST) to identify and manipulate content sections defined by headings. It allows developers to find a specific heading, capture all content nodes within its section (up to the next heading of the same or lower depth, or the end of the document), and then apply a handler function to modify or replace that content. The current stable version is 4.0.0, released in a mostly ad-hoc fashion following the syntax-tree ecosystem's release schedule, typically with minor versions for features and patch versions for fixes. Key differentiators include its focus on heading-based content segmentation, offering a programmatic way to update generated sections (like a Table of Contents), and its integration within the broader `unified` and `remark` ecosystem. It is an ESM-only package since version 3.0.0 and requires Node.js 16 or higher as of version 4.0.0.