CI/CD pipeline

      graph TD
        subgraph Source[Source control]
          A[Push to main]
          B{Branch target?}
          C[Preview deploy]
        end

        subgraph Validate[Validation suite]
          D[Static analysis]
          E[Unit tests]
          F[Integration tests]
          G[Policy checks]
        end

        subgraph Build[Build artifact]
          H[Package application]
          I[Build image]
          J[Publish artifact]
        end

        subgraph Release[Release gates]
          K[Deploy staging]
          L{Smoke tests pass?}
          M[Alert owners]
          N{Production approval?}
        end

        subgraph Observe[Production observe]
          O[Deploy production]
          P[Health checks]
          Q[Done]
        end

        A --> B
        B -->|feature| C
        B -->|main| D
        D --> E
        E --> F
        F --> G
        G --> H
        H --> I
        I --> J
        J --> K
        K --> L
        L -->|No| M
        L -->|Yes| N
        N -->|Approved| O
        O --> P
        P --> Q

        classDef source stroke-width:2px;
        classDef validate stroke-width:2px;
        classDef build stroke-width:2px;
        classDef release stroke-width:2px;
        classDef gate stroke-width:3px;
        classDef failure stroke-width:3px,stroke-dasharray:4 3;
        classDef success stroke-width:3px;
        classDef critical stroke-width:4px;

        class A,B,C source;
        class D,E,F,G validate;
        class H,I,J build;
        class K release;
        class L,N gate;
        class M failure;
        class O,P,Q success;
        class A,B,D,E,F,G,H,I,J,K,L,N,O,P,Q critical;

        linkStyle 0,2,3,4,5,6,7,8,9,10,12,13,14,15 stroke:#CA8A04,stroke-width:3px;
        linkStyle 11 stroke:#DC2626,stroke-width:3px,stroke-dasharray:6 4;