digraph handover_agent {
    rankdir=TB
    bgcolor="#0a0e17"
    fontname="Helvetica"
    node [fontname="Helvetica" fontsize=10 style=filled color="#1e2a4a" fontcolor="#e8eaf0"]
    edge [fontname="Helvetica" fontsize=9 fontcolor="#8892a8" color="#4a5568"]

    label="Shift Handover Agent"
    labelloc=t
    fontsize=14
    fontcolor="#0066ff"

    start [label="START" fillcolor="#0066ff" shape=circle fontcolor="white" width=0.5]
    end_done [label="END" fillcolor="#00c853" shape=doublecircle fontcolor="white" width=0.5]

    subgraph cluster_gather {
        label="Node: gather_all  (parallel across 5 hubs)"
        color="#0066ff"
        fontcolor="#0066ff"

        gather_point [label="" shape=point width=0]

        subgraph cluster_per_hub {
            label="Per hub (ORD, EWR, IAH, SFO, DEN)"
            color="#1e2a4a"
            fontcolor="#4a5568"
            h1 [label="get_irregular_ops\n[shared]" fillcolor="#0d1a33" shape=box]
            h2 [label="get_airport_status\n[shared] ★ LIVE" fillcolor="#0d2a0d" shape=box fontcolor="#00c853"]
            h3 [label="get_pending_rebookings\n[ops]" fillcolor="#0d1a33" shape=box]
        }

        subgraph cluster_global {
            label="Global"
            color="#1e2a4a"
            fontcolor="#4a5568"
            g1 [label="get_hub_forecasts\n[shared] ★ LIVE" fillcolor="#0d2a0d" shape=box fontcolor="#00c853"]
            g2 [label="get_crew_duty_status\n[ops]" fillcolor="#0d1a33" shape=box]
            g3 [label="get_maintenance_flags\n[shared]" fillcolor="#0d1a33" shape=box]
        }
    }

    subgraph cluster_triage {
        label="Node: triage"
        color="#ff3d00"
        fontcolor="#ff3d00"

        triage [label="Score each issue:\nseverity × time_sensitivity\n\nCategorize:\nIMMEDIATE (score > 50)\nMONITOR (score > 20)\nFYI (rest)" fillcolor="#121829" shape=box]

        subgraph cluster_items {
            rank=same
            color="#1e2a4a"
            fontcolor="#4a5568"
            label="Triage Categories"
            imm [label="IMMEDIATE\n▶ crew limits\n▶ cancellations\n▶ ground stops" fillcolor="#3a0d0d" shape=box fontcolor="#ff3d00"]
            mon [label="MONITOR\n⚠ weather risk\n⚠ GDP active\n⚠ MEL restrictions" fillcolor="#3a2a0d" shape=box fontcolor="#ffc107"]
            fyi [label="FYI\nℹ nominal hubs\nℹ resolved items" fillcolor="#1a1a2a" shape=box fontcolor="#8892a8"]
        }
    }

    subgraph cluster_synth {
        label="Node: synthesize"
        color="#1e2a4a"
        fontcolor="#8892a8"
        synth [label="generate_narrative()\n[ops server]\n\nStructured brief:\nheader → immediate → monitor → fyi" fillcolor="#121829" shape=box]
    }

    subgraph cluster_format {
        label="Node: format_output"
        color="#1e2a4a"
        fontcolor="#8892a8"
        format [label="Structure brief JSON\nStore as ops://handover/latest\nRecord timing" fillcolor="#121829" shape=box]
    }

    // Flow
    start -> gather_point

    gather_point -> h1 [color="#0066ff"]
    gather_point -> h2 [color="#0066ff"]
    gather_point -> h3 [color="#0066ff"]
    gather_point -> g1 [color="#0066ff"]
    gather_point -> g2 [color="#0066ff"]
    gather_point -> g3 [color="#0066ff"]

    h1 -> triage [color="#4a5568"]
    h2 -> triage [color="#4a5568"]
    h3 -> triage [color="#4a5568"]
    g1 -> triage [color="#4a5568"]
    g2 -> triage [color="#4a5568"]
    g3 -> triage [color="#4a5568"]

    triage -> imm [style=invis]
    triage -> mon [style=invis]
    triage -> fyi [style=invis]

    imm -> synth [color="#ff3d00"]
    mon -> synth [color="#ffc107"]
    fyi -> synth [color="#8892a8"]

    synth -> format
    format -> end_done
}