{
  "id": "pixel-dash/chart-component-library",
  "slug": "chart-component-library",
  "title": "Session: chart-component-library — 2026-08-27",
  "type": "source",
  "project": "pixel-dash",
  "date": "2026-08-27",
  "started": "2026-08-27T11:00:00+00:00",
  "ended": "2026-08-27T14:00:00+00:00",
  "model": "claude-sonnet-4-6",
  "cwd": "/home/dev/code/pixel-dash",
  "git_branch": "feat/charts",
  "permission_mode": "default",
  "user_messages": 1,
  "tool_calls": 4,
  "tools_used": [
    "Bash",
    "Write"
  ],
  "is_subagent": false,
  "wikilinks_out": [
    "D3",
    "React",
    "Storybook",
    "TypeScript",
    "pixel-dash"
  ],
  "body_text": "Project: pixel-dash · Branch: feat/charts · Mode: default · Model: claude-sonnet-4-6\n\nSummary\n\nBuilt a small typed chart kit on top of D3 scales: LineChart, BarChart, Sparkline, shared axis and tooltip primitives, and Storybook stories for each. Charts resize with a ResizeObserver hook.\n\nConversation\n\nTurn 1 — User\n\nI need reusable chart components for the dashboard. React + TypeScript, no heavy chart library.\n\nTurn 1 — Assistant\n\nD3 only for scales and shapes, React for rendering. A useResize hook drives width; every chart takes typed Series<T> data.\n\nexport function Sparkline({ data, height = 32 }: SparklineProps) {\n  const [ref, width] = useResize<HTMLDivElement>();\n  const x = scaleLinear().domain([0, data.length - 1]).range([0, width]);\n  const y = scaleLinear().domain(extent(data) as [number, number]).range([height, 0]);\n  const d = line<number>().x((_, i) => x(i)).y(y)(data) ?? \"\";\n  return (\n    <div ref={ref}>\n      <svg width={width} height={height}><path d={d} fill=\"none\" stroke=\"currentColor\" /></svg>\n    </div>\n  );\n}\n\nTools used in this turn:\n\n- Write: src/charts/LineChart.tsx\n- Write: src/charts/useResize.ts\n- Write: src/charts/LineChart.stories.tsx\n- Bash: pnpm test — 18 passed\n\nConnections\n\n- pixel-dash\n- React\n- D3\n- Storybook\n- TypeScript",
  "sha256": "83cd94ba71bded00",
  "source_url": "sessions/pixel-dash/2026-08-27-chart-component-library.html"
}