Responsibility is clearly shifting more towards the developer. LLMs and agents make this part of the work much easier. With good tests, skills, and guard rails, developers can ensure a high level of quality even before opening the PR.
This also fits in with Simon Willisons Agentic Engineering Anti-Patterns. Developers should already be sure that the code works before submitting it for review. The reviewer is no longer the one who produces the quality, but the one who verifies it.