pencil

$npx mdskill add partme-ai/full-stack-skills/pencil

Edit encrypted .pen design files via Pencil MCP tools.

  • Handles reading, modifying, and validating .pen design assets.
  • Depends on Pencil MCP Server for all file access operations.
  • Executes batch operations in 25-step limits with prior planning.
  • Delivers verified layout snapshots and design state updates.

SKILL.md

.github/skills/pencilView on GitHub ↗
---
name: "pencil"
description: "用于通过 Pencil MCP 读取/修改 .pen 设计文件并校验布局。用户提到 pencil/.pen/设计稿编辑、需要列出工具或执行 batch_get/batch_design 时调用。"
---

# Pencil(MCP:pencil)

本 Skill 负责与 Pencil MCP Server 交互,读取/编辑加密的 `.pen` 设计文件,并提供可复制的调用模板与最佳实践。

## 关键边界与安全规则

- `.pen` 文件内容是加密的:禁止用普通文件读取/搜索方式解析 `.pen` 内容;只能通过 pencil MCP tools 访问与修改。
- 优先“先读后写”:写入前先用 `get_editor_state` / `batch_get` 了解当前文档结构与选区。
- `batch_design` 单次最多 25 条操作;超过时按“结构→内容→样式→验收”拆分多次执行。
- 任何会造成大范围变更的能力(`replace_all_matching_properties`、大批量 `batch_design`)都必须先输出变更计划,再执行。

## MCP Server 配置(参考)

```json
{
  "pencil": {
    "name": "pencil",
    "transport": "stdio",
    "command": "/Users/wandl/.trae/extensions/highagency.pencildev-0.6.15-universal/out/mcp-server-darwin-arm64",
    "args": ["--ws-port", "61405"],
    "env": {}
  }
}
```

## 使用流程(推荐)

1. `get_editor_state(include_schema=false)`:确认当前是否已打开 `.pen`、当前选区。
2. 如无文档:`open_document(filePathOrTemplate)` 打开或新建。
3. 读结构:`batch_get(...)` 获取目标节点树、组件、变量等。
4. 设计/修改:`batch_design(filePath, operations)`(≤25 ops/次)。
5. 验收:`snapshot_layout(...)` 检查布局问题;必要时 `get_screenshot(...)` 截图复核。

## 工具列表(Tools)与主要参数用途

以下为 pencil MCP 当前支持的工具(prompts/resources 不支持)。

### 1) get_editor_state

- 用途:获取当前编辑器状态、激活文档、当前选中节点等上下文。
- 参数:
  - `include_schema: boolean`:是否附带 `.pen` schema。
- 调用模板:

```json
{ "name": "get_editor_state", "arguments": { "include_schema": false } }
```

### 2) open_document

- 用途:打开或创建 `.pen` 文件。
- 参数:
  - `filePathOrTemplate: string`:`.pen` 文件路径或 `"new"`。
- 调用模板:

```json
{ "name": "open_document", "arguments": { "filePathOrTemplate": "new" } }
```

### 3) batch_get

- 用途:批量读取/搜索节点(读结构、读组件、读实例)。
- 关键参数:
  - `filePath: string`(必填)
  - `nodeIds?: string[]`:按 ID 读取
  - `parentId?: string`:限定在某节点子树内搜索
  - `patterns?: object[]`:按模式搜索(如 `name` 正则、`type`、`reusable`)
  - `includePathGeometry?: boolean`:是否返回完整 path 几何(默认会用 `...` 缩略)
  - `readDepth?: number`:读取展开深度(建议 ≤3)
  - `searchDepth?: number`:搜索深度
  - `resolveInstances?: boolean`:展开实例
  - `resolveVariables?: boolean`:解析变量为当前值
- 调用模板(按 pattern 搜索可复用组件):

```json
{
  "name": "batch_get",
  "arguments": {
    "filePath": "designs/app.pen",
    "patterns": [{ "reusable": true }],
    "readDepth": 2,
    "searchDepth": 3
  }
}
```

### 4) batch_design

- 用途:批量执行插入/复制/更新/替换/移动/删除/图片等操作。
- 关键参数:
  - `filePath: string`(必填)
  - `operations: string`(必填):操作脚本(每行一个 op,可绑定变量名;≤25 ops/次)。
- 调用模板(示意):

```json
{
  "name": "batch_design",
  "arguments": {
    "filePath": "designs/app.pen",
    "operations": "root=G()\\nframe=I(root,{type:\\\"frame\\\",name:\\\"Home\\\"})\\nU(frame,{width:390,height:844})"
  }
}
```

### 5) snapshot_layout

- 用途:检查布局结构与常见问题(重叠、裁剪等),可只返回问题节点。
- 关键参数:
  - `filePath: string`(必填)
  - `parentId?: string`:仅检查子树
  - `maxDepth?: number`:检查深度
  - `problemsOnly?: boolean`:仅输出有问题的节点
- 调用模板:

```json
{
  "name": "snapshot_layout",
  "arguments": { "filePath": "designs/app.pen", "maxDepth": 2, "problemsOnly": true }
}
```

### 6) get_screenshot

- 用途:对指定节点截图(视觉验收)。
- 参数:
  - `filePath: string`(必填)
  - `nodeId: string`(必填)
- 调用模板:

```json
{
  "name": "get_screenshot",
  "arguments": { "filePath": "designs/app.pen", "nodeId": "node_123" }
}
```

### 7) get_guidelines

- 用途:获取设计指南/规则。
- 参数:
  - `topic: \"code\" | \"table\" | \"tailwind\" | \"landing-page\" | \"design-system\"`(必填)
- 调用模板:

```json
{ "name": "get_guidelines", "arguments": { "topic": "design-system" } }
```

### 8) get_style_guide_tags

- 用途:获取可用风格标签集合。
- 调用模板:

```json
{ "name": "get_style_guide_tags", "arguments": {} }
```

### 9) get_style_guide

- 用途:按 tags 或 id 获取风格指南。
- 参数(可选):
  - `tags?: string[]`
  - `id?: string`
- 调用模板:

```json
{ "name": "get_style_guide", "arguments": { "tags": ["mobile", "minimal", "fresh"] } }
```

### 10) get_variables

- 用途:读取 `.pen` 文件的变量与主题(用于生成全局样式/代码映射)。
- 参数:
  - `filePath: string`(必填)
- 调用模板:

```json
{ "name": "get_variables", "arguments": { "filePath": "designs/app.pen" } }
```

### 11) set_variables

- 用途:更新 `.pen` 文件的变量与主题。
- 参数:
  - `filePath: string`(必填)
  - `variables: object`(必填)
  - `replace?: boolean`:是否全量替换(默认合并)。
- 调用模板:

```json
{
  "name": "set_variables",
  "arguments": { "filePath": "designs/app.pen", "replace": false, "variables": {} }
}
```

### 12) find_empty_space_on_canvas

- 用途:在画布或某节点周边查找指定尺寸的空白区域。
- 参数:
  - `filePath: string`(必填)
  - `width: number`(必填)
  - `height: number`(必填)
  - `padding: number`(必填)
  - `direction: \"top\" | \"right\" | \"bottom\" | \"left\"`(必填)
  - `nodeId?: string`:以某节点为参照(可选)
- 调用模板:

```json
{
  "name": "find_empty_space_on_canvas",
  "arguments": {
    "filePath": "designs/app.pen",
    "width": 390,
    "height": 844,
    "padding": 24,
    "direction": "right"
  }
}
```

### 13) search_all_unique_properties

- 用途:统计指定子树里若干属性(颜色/字体/间距等)的唯一值集合,用于分析是否一致。
- 参数:
  - `filePath: string`(必填)
  - `parents: string[]`(必填)
  - `properties: string[]`(必填;枚举:fillColor/textColor/strokeColor/strokeThickness/cornerRadius/padding/gap/fontSize/fontFamily/fontWeight)
- 调用模板:

```json
{
  "name": "search_all_unique_properties",
  "arguments": {
    "filePath": "designs/app.pen",
    "parents": ["root_frame"],
    "properties": ["fillColor", "fontFamily", "fontSize"]
  }
}
```

### 14) replace_all_matching_properties

- 用途:在指定子树里批量替换匹配属性(换色/换字体/调整间距等)。
- 参数:
  - `filePath: string`(必填)
  - `parents: string[]`(必填)
  - `properties: object`(必填):按属性名提供 from/to 替换规则列表
- 调用模板:

```json
{
  "name": "replace_all_matching_properties",
  "arguments": {
    "filePath": "designs/app.pen",
    "parents": ["root_frame"],
    "properties": {
      "fontFamily": [{ "from": "Inter", "to": "SF Pro" }],
      "fontSize": [{ "from": 14, "to": 15 }]
    }
  }
}
```

## 常见任务提示词(给大模型的执行指令模板)

### A) “打开并分析当前设计结构”

1) 调用 `get_editor_state(include_schema=false)` 获取 activeFilePath 与 selection  
2) 用 `batch_get` 读取选中节点与其子树(readDepth=2)  
3) 用 `snapshot_layout(problemsOnly=true)` 输出布局问题清单  
4) 必要时 `get_screenshot` 对问题节点截图确认

### B) “批量换主题/换字体/统一间距”

1) `search_all_unique_properties` 先统计现状(输出唯一值集合与分布)  
2) 提出变更计划(from→to 映射、影响范围、回滚策略)  
3) `replace_all_matching_properties` 执行替换  
4) `snapshot_layout` + `get_screenshot` 验收

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