Notes about the setup/installation process:

The "Build container images" is confusing and written for someone who is familiar with GitHub Actions and ghcr.io. `fork this repo` should be linkified. The page never actually tells you where the repo is; you have to infer it from a `go install` command. It's https://github.com/GoogleCloudPlatform/scion/.

Under "Building Custom Images," option 1 seems to require having cloned the repository, but as mentioned earlier, there's no indication of where the repo is hosted. This option fails for me with `=> ERROR [internal] load metadata for ghcr.io/sowbug/core-base:latest`, and I don't know what that means. My guess would be it's a dependency error because the build-images.sh script was not tested with a completely clean registry like mine. (Update: I got farther by adding `--target core-base` to the script arguments. This means that the script documentation "Build scion-base + all harness images" is misleading, because it requires you to know that scion-base depends on core-base, but the "Quick Start" script doesn't build that for you.) (Update 2: this still fails with "failed to fetch anonymous token," which I'm guessing is needed for me to upload to my registry. To reiterate, until today I had no idea that I had a registry.) (Update 3: I had to authenticate -- different from gh auth login -- using `echo "ghp_[rest of PAT]" | docker login ghcr.io -u [your-github-username] --password-stdin`. I got the PAT at https://github.com/settings/tokens and creating a classic personal access token with permissions read:org and write:packages.)

Option 2 starts with "If your project is hosted on GitHub," but I don't have a project (I want to test-drive Scion to start one), so I don't know whether that option applies to me. I tried it anyway, and it failed with a similar error as option 1 -- "core-base:latest: not found."

I'm not going to try Option 3, because it appears to give even less background than the prior options.

The instructions are inconsistent about referring to `ghcr.io/myorg` or `ghcr.io/<your-username>`. If anything, it is consistently backward in that it includes ghcr.io/myorg in text designed to be copied/pasted, and ghcr.io/<your-username> in text designed to be read.

scion init --machine doesn't check to see whether you've already set the image_registry option (as you would if you went through Quick Start Option 1), so you have to retype it.

Google open-sources experimental agent orchestration testbed Scion