Is there any way for me to specify something in the URL to default the title of the pull request? It seems that the title is now either the title of the commit (if there is only one commit) or the branch name (if there are multiple commits). I would like to default something within my control if possible.
Grateful for any answer
Welcome to the community!
Yes, you can create a pull request with your own URI without curl. They are two different things. The URI is the point you need to connect to in order to ask Bitbucket to do something. Curl is just a program that can call a URI. You can call your URI with whatever program you want.
For contstructing the uri, and what data to send it (including "description") see https://developer.atlassian.com/cloud/bitbucket/rest/api-group-pullrequests/#api-repositories-workspace-repo-slug-pullrequests-post
Beginning on April 4th, we will be implementing push limits. This means that your push cannot be completed if it is over 3.5 GB. If you do attempt to complete a push that is over 3.5 GB, it will fail...