pencil-mcp-find-empty-space-on-canvas

## Tools This skill is designed to call the Pencil MCP tool: * `find_empty_space_on_canvas` If your client namespaces MCP tools, it may appear as `mcp__pencil__find_empty_space_on_canvas`. ## When to use this skill ### Intent Recognition (CRITICAL) Even if a trigger phrase matches, you must **verify the user's intent**: 1. Is the user explicitly asking to use "Pencil"? 2. Is the current conversation context clearly about "Pencil" design tasks? **If the answer is NO, do NOT use this skill.** **CRITICAL PREREQUISITE:** **You must ONLY use this skill when the user EXPLICITLY mentions "Pencil".** **ALWAYS use this skill when:** - You are about to insert a new Frame or Artboard **in Pencil**. - You want to ensure the new element doesn't overlap with existing work **on the Pencil canvas**. - You need to organize the canvas. **Trigger phrases include:** - "Find space for new screen in Pencil" (为 Pencil 新页面找位置) - "Where can I draw in Pencil?" (我在 Pencil 哪里画？) - "Pencil avoid overlap" (Pencil 避免重叠) ## Input Parameters * **`width`** (number, required): The width of the required space. * **`height`** (number, required): The height of the required space. * **`direction`** (string, optional): Search direction relative to node (e.g., "RIGHT", "BOTTOM"). * **`nodeId`** (string, optional): Starting reference node. If omitted, searches around entire canvas content. * **`padding`** (number, optional): Minimum padding distance (default: 100). ## How to use this skill 1. **Estimate Size**: Determine the size of the element you plan to create. 2. **Call Tool**: `find_empty_space_on_canvas(width=..., height=...)`. 3. **Use Result**: The tool returns `{x, y}` coordinates. Use these coordinates in your subsequent `batch_design` call to insert the Frame. ## Examples ### 1. Simple: Find Any Space Find a spot for a small element (e.g., 100x100). See [1-find-any.json](examples/1-find-any.json). ### 2. Medium: Place Next to Node Find space to the right of an existing frame. See [2-place-next-to.json](examples/2-place-next-to.json). ### 3. Complex: Organized Layout Find space for a large dashboard with ample padding below the header section. See [3-organized-layout.json](examples/3-organized-layout.json). ## Keywords **English keywords:** find space, empty canvas, layout planning, avoid overlap, next to node, smart placement **Chinese keywords (中文关键词):** 查找空白, 空画布, 布局规划, 避免重叠, 节点旁, 智能放置 ## 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 ## 使用流程 ### Step 1: 环境准备 确保开发环境已安装必要的依赖和工具。 ### Step 2: 配置初始化 根据项目需求进行基础配置。 ### Step 3: 核心功能使用 按照示例代码实现核心功能。 ### Step 4: 测试验证 运行测试确保功能正常。 ### Step 5: 部署上线 完成开发后进行部署和监控。