digraph rig_environment {
    rankdir=TB
    bgcolor="#0a0e17"
    fontname="Helvetica"
    node [fontname="Helvetica" fontsize=11 style=filled color="#1e2a4a" fontcolor="#e8eaf0" shape=box]
    edge [fontname="Helvetica" fontsize=9 fontcolor="#8892a8" color="#4a5568"]

    label="One environment per directory — copies never collide"
    labelloc=t
    fontsize=16
    fontcolor="#0066ff"

    dirname [label="directory name\ne.g. acmebank/" fillcolor="#1f6feb" fontcolor="#ffffff" shape=octagon]

    subgraph cluster_derived {
        label="Everything below is derived from it"
        style=dashed
        color="#1e2a4a"
        fontcolor="#8892a8"

        cname   [label="cluster name\nacmebank" fillcolor="#121829"]
        ctx     [label="kubectl context\nkind-acmebank" fillcolor="#121829"]
        img     [label="image tag\nacmebank-deps" fillcolor="#121829"]
        ports   [label="port block\n21300–21309" fillcolor="#121829"]
        reg     [label="registry container\nacmebank-registry" fillcolor="#121829"]
    }

    subgraph cluster_config {
        label="Configuration — weakest first, later wins"
        style=dashed
        color="#1e2a4a"
        fontcolor="#8892a8"

        versions [label="versions.env\npinned toolchain" fillcolor="#121829"]
        profile  [label="env.d/<profile>.env\noptional: addons · registry" fillcolor="#121829"]
        localenv [label="ctrl/.env\nsecrets, overrides" fillcolor="#121829"]
        shell    [label="the environment\nPROFILE=client make …" fillcolor="#1a3a1a" fontcolor="#00c853"]
    }

    dirname -> cname
    dirname -> ctx
    dirname -> img
    dirname -> ports
    dirname -> reg

    versions -> profile  [label="overridden by"]
    profile  -> localenv [label="overridden by"]
    localenv -> shell    [label="overridden by" color="#00c853"]

    cluster [label="kind cluster" fillcolor="#1a1a3a" fontcolor="#0066ff" shape=octagon]
    cname -> cluster
    ports -> cluster
    shell -> cluster [style=dashed]
}