For the Kotlin KEEP process https://github.com/Kotlin/KEEP/ - does anyone know why discussions are meant to be broken up into an ISSUE istead of directly in a PR? I also see some discussion in the PR. Also, is the idea that if an idea is agreed upon after discussion in the issue the issue is closed and the PR is merged?

In PR should be discussed only text of PR, so actual text or structure of proposal document, issue for the discussion of proposal itself. Also some keep have multiple PRs with updated text Yes, if it's decided to implement, KEEP is merged

Ah makes sense. Thanks!