Mind map (radial)

{
  "nodes": [
    { "id":"c","type":"ellipse","label":"Q1 launch","x":460,"y":240,"fill":"#ede9fe","stroke":"#6d28d9" },
    { "id":"b1","type":"ellipse","label":"Engineering","x":120,"y":40,"fill":"#dbeafe","stroke":"#2563eb" },
    { "id":"b2","type":"ellipse","label":"Marketing","x":820,"y":40,"fill":"#dcfce7","stroke":"#15803d" },
    { "id":"b3","type":"ellipse","label":"Operations","x":120,"y":440,"fill":"#fef3c7","stroke":"#a16207" },
    { "id":"b4","type":"ellipse","label":"Customer","x":820,"y":440,"fill":"#fce7f3","stroke":"#be185d" },
    { "id":"l1","type":"note","label":"Feature flag","x":-60,"y":120,"fill":"#dbeafe" },
    { "id":"l2","type":"note","label":"Load test","x":60,"y":-60,"fill":"#dbeafe" },
    { "id":"l3","type":"note","label":"Press kit","x":900,"y":-60,"fill":"#dcfce7" },
    { "id":"l4","type":"note","label":"Launch email","x":1020,"y":120,"fill":"#dcfce7" },
    { "id":"l5","type":"note","label":"Runbook","x":-60,"y":420,"fill":"#fef3c7" },
    { "id":"l6","type":"note","label":"On-call rota","x":60,"y":540,"fill":"#fef3c7" },
    { "id":"l7","type":"note","label":"Onboarding","x":900,"y":540,"fill":"#fce7f3" },
    { "id":"l8","type":"note","label":"NPS survey","x":1020,"y":420,"fill":"#fce7f3" }
  ],
  "edges": [
    { "id":"e1","source":"c","target":"b1" },
    { "id":"e2","source":"c","target":"b2" },
    { "id":"e3","source":"c","target":"b3" },
    { "id":"e4","source":"c","target":"b4" },
    { "id":"e5","source":"b1","target":"l1" },
    { "id":"e6","source":"b1","target":"l2" },
    { "id":"e7","source":"b2","target":"l3" },
    { "id":"e8","source":"b2","target":"l4" },
    { "id":"e9","source":"b3","target":"l5" },
    { "id":"e10","source":"b3","target":"l6" },
    { "id":"e11","source":"b4","target":"l7" },
    { "id":"e12","source":"b4","target":"l8" }
  ]
}