I am in the process of creating a custom extension for DevOps, which will add a tab to the Pull Request details page and allow the user to provide some additional values. In this example, the user will be specifying Release Notes.

I am at a point of having the tab added to the UI and a field ready to collect the value. This is where I am stuck.

I cannot figure out how to save the value provided against the Pull Request itself. I can't find any documentation or guidance online. Something to bear in mind is that these custom values will need to be retrievable via some sort of report/query.

I've read that the ExtensionData service can be used to store values against the user/create documents, but I don't think that's what I need.

If anyone could point me in the right direction that would be brilliant! Thanks, Rob