We have plans to talk to the client teams regarding use of Dirk directly with their validator clients, but there is no direct integration available today.
Vouch can talk to Teku via the now-standard REST API, and use Dirk as its signer. Details on how to use Vouch withe Teku can be found in the link provided.
Does Dirk work with Teku? Can you show how to use this tool with Teku and Prysm for Medella?