Plugins that aggregate information from multiple pages

This site demonstrates how a MyST plugin can collect information from every page in a project and render it in one place. The demo is a site-wide glossary: mark a term anywhere with a keyterm directive, and a single term-glossary placeholder is replaced with an alphabetised list of every term defined across the whole project.

• Physics and Biology each define a couple of terms.

• The Glossary lists all of them, aggregated at build time.

• How it works walks through the plugin code so you can reuse the pattern.