👍 planning to test and merge this soon

In reading the docs for --protocol in man rsync, it looks like this flag is mainly intended for use with the --write-batch option. I would've thought that in regular circumstances, rsync would negotiate the protocol version with the server automatically, but maybe that isn't the case. So just to double check: if you run something like rsync README.md app@<your server domain>:README.md, with and without the --protocol=29 option, it only works when the --protocol option is set, right?

Also out of curiosity can you paste the output of rsync --version | head -1 both on your local machine and on the server (ec2 right?). I'm wondering if the client or the server has the older version.

It's when the sender(client) is an older version.
On the server: rsync version 3.2.7 protocol version 31
On the local machine: rsync version 2.6.9 protocol version 29

👍 thanks for checking.

Just released this. You can upgrade your app's :dev alias dependencies to:

:extra-deps {com.biffweb/tasks {:git/url "https://github.com/jacobobryant/biff",
                                :git/tag "v1.8.26"
                                :git/sha "1a1eccf"}}