GitHub's API has an endpoint to request reviewers for a pull request. Reviewers can be individual users (reviewers) or entire teams (team_reviewers) (teams can be created at the org level).
For instance, the following will request a PR review from Stack Overflow's SRE team:
curl \
-X POST \
-H "Accept: application/vnd.github.v3+json" \
https://api.github.com/repos/StackExchange/dnscontrol/pulls/930/requested_reviewers \
-d '{"team_reviewers":["SRE"]}'
Similarly, in GitHub's CLI, the gh pr create command to create a pull request has a --reviewer flag, equivalent to the reviewers API parameter. So, as stated in the documentation, you can do the following to request a PR review from individual users:
$ gh pr create --reviewer monalisa,hubot
However, there doesn't appear to be a flag which is equivalent to the team_reviewers API parameter.
Is it possible to request a PR review from a team via the GitHub CLI?
UPDATE looking at the source of the CLI, --reviewer should just accept team names in the format org/teamname. I was just able to confirm it locally, but it's failing in a GitHub Actions workflow. Digging more...
Unlike the API, the CLI doesn't have a separate parameter. --reviewer just accepts team names in the format org/teamname as well. For example:
$ gh pr create --reviewer stackexchange/sre
(PR to document this a little better)
Note that when doing this in GitHub Actions workflow, GITHUB_TOKEN won't have enough permissions to request a PR review from a team. You'll have to use a personal access token with additional permissions.