teachingai/pencil-mcp-get-screenshot
skills/pencil-skills/pencil-mcp-get-screenshot/SKILL.md
Capture a visual screenshot of a specific node in a Pencil .pen file via the get_screenshot MCP tool. Use when the user explicitly mentions Pencil and needs to visually verify a design operation, check for alignment or spacing issues, or review a component after batch_design changes.
$ install --global
skillsauthnpx skillsauth add teachingai/agent-skills pencil-mcp-get-screenshotInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Apr 10, 2026, 9:01 AM36.2s5 files scanned
SKILL.md
- name:
- pencil-mcp-get-screenshot
- description:
- Capture a visual screenshot of a specific node in a Pencil .pen file via the get_screenshot MCP tool. Use when the user explicitly mentions Pencil and needs to visually verify a design operation, check for alignment or spacing issues, or review a component after batch_design changes.
- license:
- Complete terms in LICENSE.txt
Tools
This skill is designed to call the Pencil MCP tool:
get_screenshot
If your client namespaces MCP tools, it may appear as mcp__pencil__get_screenshot.
When to use this skill
Intent Recognition (CRITICAL)
Even if a trigger phrase matches, you must verify the user's intent:
- Is the user explicitly asking to use "Pencil"?
- Is the current conversation context clearly about "Pencil" design tasks?
If the answer is NO, do NOT use this skill. (e.g., "Get screenshot" might refer to a browser screenshot via Puppeteer).
CRITICAL PREREQUISITE: You must ONLY use this skill when the user EXPLICITLY mentions "Pencil".
ALWAYS use this skill when:
- You have completed a design operation (
batch_design) and need to verify the result in Pencil. - The user asks to "Show me" or "Take a look" at the Pencil design.
- You need to check for visual bugs (text overflow, alignment, contrast).
- This is the Verify step in the Design Loop.
Trigger phrases include:
- "Get Pencil screenshot" (获取 Pencil 截图)
- "Pencil visual check" (Pencil 视觉检查)
- "Verify Pencil design" (验证 Pencil 设计)
- "Show me the button in Pencil" (给我看 Pencil 里的那个按钮)
Input Parameters
filePath(string, optional): Path to access a specific.penfile.nodeId(string, required): The ID of the node to screenshot.
How to use this skill
- Identify Target: Get the
nodeIdof the element you just modified or created. - Call Tool:
get_screenshot(nodeId='...'). - Analyze Result:
- The tool returns an image URL or data.
- CRITICAL: You must "look" at the image (if capabilities allow) or present it to the user for feedback.
- Check for: Alignment, Spacing, Text Truncation, Color correctness.
Examples
1. Simple: Node Screenshot
Get a visual verification of a single element. See 1-node-screenshot.json.
2. Medium: Frame Verification
Screenshot a whole frame to check layout and composition. See 2-frame-verification.json.
3. Complex: Design System Check
Screenshot a component master to ensure the design system update looks correct. See 3-component-check.json.
Keywords
English keywords: get screenshot, visual verification, check design, view node, render image, visual audit
Chinese keywords (中文关键词): 获取截图, 视觉验证, 检查设计, 查看节点, 渲染图片, 视觉审计
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