> For the complete documentation index, see [llms.txt](https://docs.sonsofphp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sonsofphp.com/components/event-sourcing/event-messages/message-enrichers.md).

# Message Enrichers

Message Enrichers will add Metadata to the Event Messages. This metadata could be information about the user, the http request, etc. Internally, the library will use the metadata to insert data about the aggregate and the event.