Currently I don't see a way to find if a PR is out of base in circle. Is there an orb or an in-build cirlce feature that supports this? Thanks

You should be able to configure GitLab proyects workflows as public for open source

When you send a commit with [skip ci] in message, the CI is skipped in CircleCI but it don't send back the status to GitLab, so GitLab keeps waiting forever for the end of the pipeline execution and expires by timeout.

I followed the Gitlab project setup guide, but all the builds fail because CircleCI says my SSH key is invalid: Using SSH Config Dir '/home/circleci/.ssh' git version 2.25.1 Cloning git repository Cloning into '.'... Warning: Permanently added the ECDSA host key for IP address '172.65.251.78' to the list of known hosts. Load key "/home/circleci/.ssh/id_rsa": invalid format git@gitlab.com : Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. exit status 128 I didn't add a new SSH key, so it's just using the default CircleCI SSH key that's supposed to have access to the Gitlab repo. When I SSH into CircleCI to check the build, it shows that the SSH key is just an empty file: circleci@0889e6f9737d:~$ cat /home/circleci/.ssh/id_rsa

Pushing a tag in GitLab repository don't trigger the pipeline. Tag Push Events is selected in Webhook.