# Reference

* [The `tls-certificates` library](tls-certificates-interface.md)
  * [How the interface works](tls-certificates-interface.md#how-the-interface-works)
  * [Key concepts](tls-certificates-interface.md#key-concepts)
  * [Getting started](tls-certificates-interface.md#getting-started)
  * [Further resources](tls-certificates-interface.md#further-resources)
* [TLS Certificates Interface Library Versions](reference/library-versions.md)
* [Important Update: New Labels for Juju Secrets](reference/juju-secrets-labels.md)
  * [What’s Changing](reference/juju-secrets-labels.md#whats-changing)
  * [Impact on Your Deployment](reference/juju-secrets-labels.md#impact-on-your-deployment)
  * [Why This Change Was Needed](reference/juju-secrets-labels.md#why-this-change-was-needed)
* [Recommended Juju Configuration Options for TLS Requirers](reference/recommended-juju-config.md)