Nice. I wrote txeh because the lib I was using for kubefwd (a Kubernetes port forward utility) was a little too opinionated about the format and use of /etc/hosts. A few of libs I looked at really wanted to take over the file.
I built the CLI because I needed a fast way to remove CIDR ranges (ie 172.27.1.0/24, etc..) when 100's of IPs get added and then no longer needed.