digraph efhas_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="FCE Agent — Behind Every Departure"
    labelloc=t
    fontsize=14
    fontcolor="#0066ff"

    start [label="START" fillcolor="#0066ff" shape=circle fontcolor="white" width=0.5]
    end_skip [label="END\n(no notification)" fillcolor="#4a5568" shape=doublecircle fontcolor="#e8eaf0" width=0.6]
    end_done [label="END" fillcolor="#00c853" shape=doublecircle fontcolor="white" width=0.5]

    subgraph cluster_triage {
        label="Node: triage"
        color="#1e2a4a"
        fontcolor="#8892a8"
        triage [label="get_flight_status()\n\ndelay < 10min → skip\nON_TIME → skip" fillcolor="#121829" shape=box]
    }

    subgraph cluster_gather {
        label="Node: gather_context  (parallel)"
        color="#0066ff"
        fontcolor="#0066ff"

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

        subgraph cluster_gather_tools {
            rank=same
            g1 [label="get_flight_\ndetails\n[shared]" fillcolor="#0d1a33" shape=box]
            g2 [label="get_route_\nweather\n[shared] ★ LIVE" fillcolor="#0d2a0d" shape=box fontcolor="#00c853"]
            g3 [label="get_airport_\nstatus\n[shared] ★ LIVE" fillcolor="#0d2a0d" shape=box fontcolor="#00c853"]
            g4 [label="get_airport_\ncongestion\n[shared] ★ HYBRID" fillcolor="#0d2a0d" shape=box fontcolor="#ffc107"]
            g5 [label="get_crew_\nnotes\n[ops]" fillcolor="#0d1a33" shape=box]
        }
    }

    subgraph cluster_synth {
        label="Node: synthesize"
        color="#1e2a4a"
        fontcolor="#8892a8"
        synth [label="generate_notification()\n[passenger server]\n\nContext → empathetic text\nMissing data → omit section" fillcolor="#121829" shape=box]
    }

    subgraph cluster_format {
        label="Node: format_output"
        color="#1e2a4a"
        fontcolor="#8892a8"
        format [label="Structure notification JSON\nAttach data sources\nRecord timing" fillcolor="#121829" shape=box]
    }

    subgraph cluster_review {
        label="Node: human_review"
        color="#1e2a4a"
        fontcolor="#8892a8"
        review [label="Human approval gate\n(auto-approve in demo)" fillcolor="#121829" shape=box]
    }

    // Flow
    start -> triage

    triage -> end_skip [label="should_notify = false" style=dashed color="#ff3d00" fontcolor="#ff3d00"]
    triage -> gather_label [label="should_notify = true"]

    gather_label -> g1 [color="#0066ff"]
    gather_label -> g2 [color="#0066ff"]
    gather_label -> g3 [color="#0066ff"]
    gather_label -> g4 [color="#0066ff"]
    gather_label -> g5 [color="#0066ff"]

    g1 -> synth [style=invis]
    g2 -> synth [style=invis]
    g3 -> synth [style=invis]
    g4 -> synth [style=invis]
    g5 -> synth [style=invis]

    {g1 g2 g3 g4 g5} -> synth [label="" color="#4a5568" constraint=true]

    synth -> format
    format -> review
    review -> end_done
}