ECharts Design System Initializer

Constraint: Only use this skill when the user explicitly mentions "Pencil" and "ECharts" or when orchestrating a Pencil design system initialization task for charts.

When to use this skill

Use this skill when you need to initialize a chart/design system based on ECharts specifications in a .pen file: set up chart theme colors and create placeholder frames for chart types (line, bar, pie, etc.).

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 ECharts-related design tokens (chart theme colors, font). Follow .pen file schema.

Chart colors (palette)

• echarts-color-1: #5470c6
• echarts-color-2: #91cc75
• echarts-color-3: #fac858
• echarts-color-4: #ee6666
• echarts-color-5: #73c0de

Axis / grid / text

• echarts-axis-line-color: #6e7079
• echarts-split-line-color: #e0e6f1
• echarts-text-color: #6e7079
• echarts-font-size: 12px

Fill from ECharts 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, Bar, Pie, Scatter, Radar, Gauge
2. Complex Charts (复杂图表)
   • Candlestick, Heatmap, Tree, Treemap, Sunburst, Parallel, Sankey, Funnel, PictorialBar
3. Containers (容器)
   • Chart container placeholder, Legend placeholder, Grid placeholder

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

Best Practices

• Verify token values against ECharts 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.

Keywords

pencil, echarts, 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.