flowchart LR
    A["Deployment arrives\nat env gate"] --> B["Confidence signal\ncomputed"]
    B --> C{"Meets\nthreshold?"}
    C -->|No / Critical| D["Halt —\nexplainable reason"]
    C -->|Yes| E{"Human attestation\nrequired?"}
    E -->|No — dev| F["Autonomous\nproceed"]
    E -->|Yes — qa/prod/dr| G["Approver reviews:\ncontract + plan + evidence"]
    G --> H{"Approver\ndecides"}
    H -->|Approve| I["Attestation recorded\n(identity + state)"]
    H -->|Reject| J["Halt — rejection\nextends audit chain"]
    I --> K["Deployment\nproceeds"]
    F --> K
    K --> L["Evidence written\nRPO=0"]