sequenceDiagram
    autonumber
    participant E as Snapshot, reset or schedule change
    participant R as Readiness workflow
    participant S as Raid and roster state
    participant D as Notification delivery
    participant P as Player and officer
    E->>R: Re-evaluate affected raid targets
    R->>S: Load current observations, schedule and selected options
    R->>R: Compute verdict for each target at raid start
    alt Verdict and assignment remain unchanged
        R->>S: Refresh evaluation evidence without duplicate alerts
    else Affected selection is no longer ready
        R->>S: Record new verdict and flag published roster for review
        R->>D: Request one material-change notification
        D-->>P: Explain target, reset, freshness and required action
        P->>S: Resync or officer revises affected composition
    end
    D->>D: Retry failed transport delivery using same change identity