pencil-ui-design-system-echarts

# 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.