# Reference The pages in this section contain technical information for topics related to the Traefik charm. * [Charm architecture](charm-architecture/index.html.md) * [Cryptographic documentation for COS-Lite charms](cryptographic-documentation-for-cos-lite-charms/index.html.md) * [Ingress library reference](ingress-libraries/index.html.md) * [Changelog](../changelog/index.html.md)