[hunterbrooks]

It's most helpful when a GitHub/Linear issue is linked because the "why" is extracted, and also for larger PR's

[mhluongo]

The "why" should be in the commit message. That's what it's for

[cornel_io]

Different strokes: I prefer it in the PR, with a lot of detail, with commits that are very granular and just explain what they do. PR descriptions should have all the why, test cases, pictures, etc.