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flowchart TB
  subgraph R1[" "]
    direction LR
    A["提出问题<br/>证据：用户影响、复现"] -->|"产品决定"| B["接受工作<br/>证据：目标、范围、优先级"]
    B -->|"技术决定"| C["形成方案<br/>证据：影响面、风险、验收标准"]
    C -->|"授权实现"| D["分支开发<br/>证据：Commit、测试、文档"]
  end
  subgraph R2[" "]
    direction LR
    E["PR / MR<br/>证据：Diff、检查清单、审查意见<br/>失败则返回开发"] -->|"门禁通过"| F["合入主分支<br/>证据：必需状态、批准记录"]
    F -->|"发布策略"| G["部署与观察<br/>证据：版本、指标、日志、告警<br/>缺陷形成新一轮工作"]
  end
  D -->|"请求合并"| E

  style R1 fill:transparent,stroke:transparent
  style R2 fill:transparent,stroke:transparent

  classDef decision fill:#e6edf5,stroke:#475569,color:#1f2937,stroke-width:1.5px;
  classDef work fill:#f7f4ed,stroke:#8b7355,color:#1f2937,stroke-width:1.5px;
  class A,B,C,E,F,G decision;
  class D work;