{
  "schemaVersion": 1,
  "chart": "timeline",
  "theme": "editorial",
  "render": {
    "width": 908,
    "padding": 24,
    "scale": 2
  },
  "data": {
    "id": "library-roadmap",
    "locale": "en-US",
    "eyebrow": "Open-source roadmap",
    "title": "Six milestones to a plugin API",
    "subtitle": "A public plan for the charting library, first render to extensible core, 2031–2033.",
    "events": [
      {
        "date": "2031 Q2",
        "name": "v0.1 First render",
        "detail": "Line and bar marks draw from a plain array of numbers. One canvas target, no interaction, no theming.",
        "accent": 1,
        "emoji": "📈",
        "icon": "chart"
      },
      {
        "date": "2031 Q4",
        "name": "v0.4 Scales and ticks",
        "detail": "Linear, time, and ordinal scales, with tick labels chosen from the data range instead of hard-coded.",
        "accent": 2,
        "emoji": "📐",
        "icon": "layers"
      },
      {
        "date": "2032 Q1",
        "name": "v0.7 Interaction layer",
        "detail": "Hover, tooltip, and range selection, each reachable from the keyboard and announced to screen readers.",
        "accent": 3,
        "emoji": "🖱️",
        "icon": "person"
      },
      {
        "date": "2032 Q3",
        "name": "v1.0 Stable API",
        "detail": "Semantic versioning begins. The mark, scale, and theme contracts are frozen for the whole 1.x line.",
        "accent": 4,
        "emoji": "🔒",
        "icon": "lock"
      },
      {
        "date": "2033 Q1",
        "name": "v1.4 Server rendering",
        "detail": "The same chart definition renders to static SVG without a browser, for documents and email digests.",
        "accent": 5,
        "emoji": "📄",
        "icon": "image"
      },
      {
        "date": "2033 Q3",
        "name": "v2.0 Plugin API",
        "detail": "Marks, scales, and themes can ship as separate packages, so the core stops growing with every new chart.",
        "accent": 6,
        "emoji": "🧩",
        "icon": "package"
      }
    ],
    "footerLabel": "Roadmap note",
    "footer": "Quarters are targets, not promises. Scope moves before dates do, and milestones ship from main."
  }
}