pencil-ui-design-system-ucharts

name	pencil-ui-design-system-ucharts
description	Initialize uCharts. design system components chart placeholders and data-viz tokens in Pencil.
license	Complete terms in LICENSE.txt

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 you need to initialize a chart/design system based on uCharts 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 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.

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.

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.

能力边界

✅ 适用场景

• 当你需要使用此技能对应的技术栈时
• 当项目需要遵循最佳实践时
• 当需要快速上手或深入理解核心概念时

⚠️ 需要注意

• 复杂业务逻辑需要结合具体场景调整
• 性能优化需要根据实际数据量评估

❌ 不适用场景

• 不相关的技术栈或框架
• 需要完全自定义的特殊场景

常见陷阱 (Gotchas)

1. 版本兼容性：注意框架版本与依赖库的兼容性，不同版本 API 可能有差异
2. 配置文件格式：配置文件格式错误是最常见的问题，建议使用编辑器的语法检查
3. 环境变量：确保所有必要的环境变量已正确设置，敏感信息不要硬编码
4. 依赖冲突：多版本共存时注意依赖冲突，使用 lock 文件锁定版本
5. 性能陷阱：大数据量场景下注意性能优化，避免 N+1 查询等常见问题