GitHub added a small Copilot code review feature this week that feels bigger than the changelog entry.

Copilot code review can now read repository-level AGENTS.md instructions.

That sounds like a nice quality-of-life improvement. Put your preferences in a file. Tell the agent how the project works. Get fewer weird review comments. Fine.

But I think the more interesting version is this: code review is starting to depend on machine-readable engineering judgment.

Not only style rules. Not only lint. Not only "please use pnpm."