We sometimes have this use case at work where we want to discuss a potential idea and get feedback without merging anything. What we do is open a PR and decline

We sometimes have this use case at work where we want to discuss a potential idea and get feedback without merging anything. What we do is open a PR and decline it directly (I'm using bitbucket lingo). This way it can't be merged, and the discussion diverges from the particulars of the diff and focuses more on the idea and the architecture of the change