graph TD
    subgraph planner
        planner_planning["planning"]
        planner_decision_making["decision-making"]
    end
    planner -->|"plan"| engineer
    subgraph engineer
        engineer_planning["planning"]
        engineer_code_writing["code-writing"]
        engineer_testing["testing"]
    end
    engineer -->|"implementation"| reviewer
    subgraph reviewer
        reviewer_code_review["code-review"]
        reviewer_testing["testing"]
    end
    reviewer -->|"review.approved == true"| end_node([end])
    reviewer -->|"review.approved == false"| engineer

dev-team