This is something that has been requested before, although not something I'd probably look to include in the core project since I attempt to avoid custom format

This is something that has been requested before, although not something I'd probably look to include in the core project since I attempt to avoid custom formats and syntax where possible. That said, I'd like to get to a point where something like mermaid.js can easily be added if desired. Over the last year the BookStack platform extensibility has grow significantly (API, Webhooks, PHP Hooks, View/Language/Icon Overries) and I'm looking to continue that to achieve such requests without over-stressing the core project itself.