{
  "schema_version": 1,
  "chart_type": "cartesian",
  "meta": {
    "title": "Weekly Signups vs Target",
    "subtitle": "Product-led growth funnel, last 8 weeks",
    "quality_profile": "showcase"
  },
  "data": {
    "columns": [
      { "id": "week", "type": "string", "values": ["W27", "W28", "W29", "W30", "W31", "W32", "W33", "W34"] },
      { "id": "signups", "type": "number", "unit": "signups", "values": [312, 298, 351, 389, 344, 412, 458, 471] },
      { "id": "target", "type": "number", "unit": "signups", "values": [320, 330, 340, 350, 360, 370, 380, 390] }
    ]
  },
  "encoding": {
    "x": { "column": "week", "scale": "band", "label": "ISO week" },
    "y": { "label": "Signups" }
  },
  "series": [
    { "id": "signups", "mark": "bar", "y": "signups", "label": "Actual signups", "role": "primary" },
    { "id": "target", "mark": "line", "y": "target", "label": "Target", "role": "comparison", "point": true }
  ],
  "cards": [
    { "title": "Takeaway", "items": ["Signups beat target in 5 of the last 8 weeks and the gap is widening.", "The W31 dip coincided with the pricing-page incident."] }
  ]
}