2.1 Code review systems2.1.1 Human-led2.1.2 Tool-facilitated2.1.3 Hybrid2.2 How does a code review work?2.2.1 The modern code review workflow2.2.2 Our code review (pull request workflow)2.3 Elements of a great PR2.3.1 Title: The “what”2.3.2 Description (the “why”)2.3.3 Labels2.3.4 Review states2.4 Code review participants and expectations2.4.1 The reviewer2.4.2 The author2.4.3 The team2.4.4 Those in charge2.4.5 The organizationSummaryReferences