composer require statamic/wikilinks
Wikilinks provides a simple modifier that seeks out any content wrapped in [braces] and automatically links it to other entries or pages with the same title (or other field of your choosing).
Let's assume we have a collection full of entries about people, one of whom is named Jerry.
content_field: It's been a long time since I've seen [Jerry].
{{ content_field | markdown | wikilinks }}
<p>It's been a long time since I've seen <a href="/people/jerry">Jerry</a>.</p>
By default Wikilinks will match by the title field, but you can pass another field as a parameter. Be sure to choose a field that exists in your search index.
Example:
{{ content_field | markdown | wikilinks:author }}