We're using some packages of the arduino-cli in other projects. Like fw-uploader plugins, arduino-create-agent and more.
When you don't tag with the v prefix golang treat that tag as it's a pseudo-version and import like: github.com/arduino/arduino-cli v0.0.0-20230529151818-ca60d4b47be4
More info here: https://go.dev/ref/mod#versions