wechat-theme-extractor

name	wechat-theme-extractor
description	Use when extracting visual styles from a WeChat article and generating a markdown-wechat-converter theme.

WeChat Theme Extractor

Overview

Extract layout and style signals from a WeChat Official Account article, then generate a reusable theme for markdown-wechat-converter. The workflow derives typography, colors, spacing, and block styles from the article, writes the generated theme into markdown-to-wechat.html, and supports previewing the result.

When to Use

Use this skill when the user:

• Provides a mp.weixin.qq.com article URL
• Wants to extract typography, color, spacing, and block styles from a WeChat article
• Wants a new theme generated for markdown-wechat-converter
• Wants the theme written into markdown-to-wechat.html and previewed

Do not use

Do not use this skill when:

• The URL is not a WeChat Official Account article
• The user only wants article text extraction without theme analysis
• The target project does not contain markdown-wechat-converter or markdown-to-wechat.html

Instructions

1. Run scripts/extract.py to fetch the article HTML and extract the title and js_content.
2. Read .extracted_content.html and analyze style traits directly from the HTML.
3. Generate a theme object compatible with markdown-wechat-converter.
4. Locate markdown-to-wechat.html in the current workspace and inject the new theme without breaking existing theme definitions.
5. Re-open the file and verify the theme entry was actually written.
6. If verification succeeds, open markdown-to-wechat.html in the browser for preview.

Workflow

User provides URL
  -> run extractor script
  -> produce .extracted_content.html
  -> analyze styles
  -> generate theme config
  -> write into markdown-to-wechat.html
  -> verify write result
  -> open preview

Run the script

python3 scripts/extract.py "https://mp.weixin.qq.com/s/xxxxx"

Script responsibilities

The Python script only:

• Fetches article HTML
• Extracts the article title
• Extracts the js_content body fragment
• Saves the result to .extracted_content.html

The AI handles:

• Style analysis
• Theme generation
• Config injection
• Post-write verification
• Preview opening

Injection rules for markdown-to-wechat.html

When updating markdown-to-wechat.html, follow these rules:

1. Find the real theme source first.

   • Search for theme-related objects, arrays, maps, or const assignments before editing.
   • Do not assume a fixed variable name unless it exists in the file.

2. Preserve the existing structure.

   • Match the file's current object style, quote style, indentation, and trailing comma convention.
   • Do not reformat unrelated sections.

3. Add, do not overwrite blindly.

   • If the new theme name does not exist, append a new entry in the existing theme collection.
   • If the same theme name already exists, update only that entry instead of duplicating it.

4. Keep the change scoped.

   • Only touch the theme definition block and any minimal registration hook required to make the theme selectable.
   • Do not modify renderer logic, event handlers, or unrelated UI code unless the file structure requires a minimal wiring change.

5. Verify after writing.

   • Re-read the edited section and confirm the theme key, title, and core style properties are present.
   • If the theme block cannot be located safely, stop and report that the target file structure needs manual confirmation.

Example theme snippet

Generate a theme object that matches the target file's existing structure. Use this as a minimal reference shape:

{
  id: "wechat-clean-blue",
  name: "WeChat Clean Blue",
  styles: {
    body: {
      fontFamily: "\"PingFang SC\", \"Helvetica Neue\", sans-serif",
      fontSize: "16px",
      color: "#2b2b2b",
      lineHeight: "1.75",
      backgroundColor: "#ffffff"
    },
    h1: {
      fontSize: "24px",
      fontWeight: "700",
      textAlign: "center",
      color: "#1f3a5f"
    },
    h2: {
      fontSize: "20px",
      fontWeight: "700",
      color: "#1f3a5f",
      borderBottom: "2px solid #9ec1ff"
    },
    blockquote: {
      color: "#4a5568",
      backgroundColor: "#f7fbff",
      borderLeft: "4px solid #7fb3ff",
      padding: "12px 16px"
    }
  }
}

When writing:

• Match the real field names used in markdown-to-wechat.html
• Convert this shape if the target file uses arrays, maps, or nested registration
• Include at minimum the theme key, display name, and core typography styles

Output file

• scripts/.extracted_content.html: extracted article body HTML with title and source URL comments at the top

Validation checklist

• The article HTML was fetched successfully
• .extracted_content.html exists and is not empty
• The title and js_content were extracted
• The new theme entry exists in markdown-to-wechat.html
• The preview page opens successfully