Does this project aim for docker cli and api compatibility? Searching for Docker on that page yields no results. Though in their example, they do show an example of a Dockerfile referencing docker.io without shame.

Typical Apple behavior, I guess, but grating to see in a OSS tool.

Here's an example of how to build a simple Alpine Linux container using Apple's containerization CLI. It also demonstrates how to connect to the container through Tailscale SSH using a Tailscale auth key stored in Apple Keychain:

https://github.com/highpost/tailscale-macos-container

I'm curious to know what kind of project is macOS exclusive?

container is really good, ive been using it to sandbox some CLI tools and it starts up in less than a second

AFAIK no support for Compose though

Thank you for this, will check it out!