When building or using services that publish data, a common question is to check whether the eventbus is receiving data.
There are some solutions, such as running history with --debug enabled, but they’re a bit clunky.
We planned to add some basic CLI tool to listen in on raw events, but somebody else already implemented it at https://mitsuruog.github.io/what-mqtt/.
Instructions for using it were added to the data publishing tutorial, but it’ll also be a useful tool for anyone checking whether his Tilt is getting/sending data.