pencil
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)
{
"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)
get_editor_state(include_schema=false):确认当前是否已打开.pen、当前选区。- 如无文档:
open_document(filePathOrTemplate)打开或新建。 - 读结构:
batch_get(...)获取目标节点树、组件、变量等。 - 设计/修改:
batch_design(filePath, operations)(≤25 ops/次)。 - 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.penschema。
- 调用模板:
{ "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:
{ "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):
{
"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):
{
"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:
{
"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:
{
"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:
{ "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:
{ "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:
{ "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:
{ "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:
{
"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:
{
"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:
{
"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:
{
"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”
- 调用
get_editor_state(include_schema=false)获取 activeFilePath 与 selection - 用
batch_get读取选中节点与其子树(readDepth=2) - 用
snapshot_layout(problemsOnly=true)输出布局问题清单 - 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”
search_all_unique_properties先统计现状(输出唯一值集合与分布)- 提出变更计划(from→to 映射、影响范围、回滚策略)
replace_all_matching_properties执行替换snapshot_layout+get_screenshot验收
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