Install Chat-CLI with Homebrew
This took me a minute to figure out, but you can now easily install Chat-CLI using the popular "missing package manager for macOS (or linux)" called Homebrew.
Just do the following:
$ brew tap chat-cli/chat-cli
$ brew install chat-cli
You will still need to be sure you have active AWS credentials installed on your system, but this is a bit easier than downloading a binary or building from source.
Now you should be able to do chat-cli chat from anywhere on your system.
Notes:
To set this up, I used GoReleaser to automatically create the Homebrew Tap in a separate repo called homebrew-chat-cli. This essentially builds the tap code and automatically updates this repo, which is used by the brew tap command.