uCharts Design System Initializer

Constraint: Only use this skill when the user explicitly mentions "Pencil" and "uCharts" (or "qiun-data-charts") or when orchestrating a Pencil design system initialization task for charts.

When to use this skill

Use this skill when:

• The user wants to initialize uCharts chart theme tokens (series colors, axis, text) in a Pencil .pen file
• The user needs placeholder frames for uCharts chart types (Line, Area, Column, Bar, Pie, Ring, Radar)
• The user mentions "Pencil" together with "uCharts", "qiun-data-charts", or chart visualization components
• An orchestrator skill (pencil-ui-designer) routes a uCharts initialization request

How to use this skill

This skill outputs a PENCIL_PLAN. The Agent then calls Pencil MCP tools in order: open_document, set_variables, batch_design, optionally get_screenshot.

Step 1: Initialize Variables (set_variables)

Use mcp__pencil__set_variables to register uCharts-related design tokens (chart theme colors, font). Follow .pen file schema.

Chart colors (series)

• ucharts-color-1: #1890ff
• ucharts-color-2: #52c41a
• ucharts-color-3: #faad14
• ucharts-color-4: #f5222d
• ucharts-color-5: #722ed1

Axis / grid

• ucharts-axis-color: #e8e8e8
• ucharts-text-color: #666666
• ucharts-font-size: 12px

Fill from uCharts theme docs if more tokens are needed.

Step 2: Create Component Overview Structure (batch_design)

Use mcp__pencil__batch_design to create a "Charts Overview" frame with placeholder sections for chart types (data-viz components):

1. Basic Charts (基础图表)
   • Line, Area, Column, Bar, Pie, Ring, Radar, Scatter
2. Combined / Advanced (组合与进阶)
   • Mix (mixed charts), Funnel, Candlestick, Heatmap, Gauge, WordCloud
3. Containers (容器)
   • Chart container placeholder, Legend placeholder

Organize frames using Auto Layout. Keep each batch_design call to maximum 25 operations.

Example: Initialize uCharts Variables

{
  "name": "set_variables",
  "arguments": {
    "filePath": "designs/dashboard.pen",
    "replace": false,
    "variables": {
      "ucharts-color-1": "#1890ff",
      "ucharts-color-2": "#52c41a",
      "ucharts-color-3": "#faad14",
      "ucharts-color-4": "#f5222d",
      "ucharts-axis-color": "#e8e8e8",
      "ucharts-text-color": "#666666",
      "ucharts-font-size": "12px"
    }
  }
}

Best Practices

• Verify token values against uCharts theme documentation.
• Use set_variables with replace: false unless a full reset is requested.
• Chart "components" here are placeholder frames for layout; actual chart config is code-side.
• Keep each batch_design call to maximum 25 operations.

Keywords

pencil, ucharts, qiun-data-charts, chart, design system, init, variables, data visualization

References

• references/contract.md – Design tokens and chart type naming.
• references/official.md – Link to official documentation.
• references/examples.md – Example PENCIL_PLAN.
• references/components.md – Chart type specifications.