I went to use this with https://ampcode.com/ in the hope of saying "Get this repo setup on Buildkite" and have it do all the work for me (including verifying/iterating until things work). Bonus points for asking it to iterate on the Docker/BK config for maximum performance (i.e. getting the right Docker caching work). At a glance though the tools are quite generic? Are there example use cases they're designed to support?
In the meantime, I've just opened buildkite/cli#478 so it can be done using the CLI instead