To create a new change, clone the repository with codereview config and hooks:

git clone https://dmitri.shuralyov.com/font/woff2 && (cd woff2 && \
	(echo '/codereview.cfg' >> .git/info/exclude) && \
	(echo 'gerrit: https://dmitri.shuralyov.com/font/woff2' > codereview.cfg) && \
	go install golang.org/x/review/git-codereview@latest && git codereview hooks)

Author your change, write a commit message, and run git codereview mail to mail it.

You'll be prompted by git to authenticate. Sign in via URL to get the git credentials to mail a change.

The general process is similar¹ to that of the Go project. See https://go.dev/doc/contribute for more information.

¹ One limitation here is that mailing multiple dependent changes is not supported at this time.