The best part is that copilot commented on the PR saying that this doesn’t actually change the behaviour, creates inconsistency in the codebase and suggested reverting the change! (This comment seems to have been ignored…)

> The configuration schema default was changed to "all", but the runtime fallback in extensions/git/src/repository.ts still calls config.get('addAICoAuthor', 'off'). This is now out of sync and can lead to unexpected behavior in contexts where the contributed configuration defaults aren't loaded (e.g., some tests/hosts), and it makes the intended default unclear. Update the runtime fallback to match the schema default (or omit the fallback so the contributed default is used).