Hello. I've started the metrics module (as previously discussed with David) and have so far created the server filter part of it. I'm looking for some feedback to see if I'm on the right track etc. Would you mind having a look please? The commit can be found here: https://github.com/kirderf/http4k/commit/0fc5e6d6c9141da14bfd8a235b7617cea4cb7659 (in my fork) The next step is to implement the client filter along the same lines, if all looks good. Finally, I'll create the documentation with examples, if that's fine, before submitting the PR.