Markdown to HTML Converter

Converts Markdown files to beautifully styled HTML with inline CSS, optimized for WeChat Official Account and other platforms.

Script Directory

Agent Execution: Determine this SKILL.md directory as SKILL_DIR, then use ${SKILL_DIR}/scripts/<name>.ts.

| Script | Purpose | |--------|---------| | scripts/main.ts | Main entry point |

Preferences (EXTEND.md)

Use Bash to check EXTEND.md existence (priority order):

bash
# Check project-level first
test -f .canghe-skills/canghe-markdown-to-html/EXTEND.md && echo "project"

# Then user-level (cross-platform: $HOME works on macOS/Linux/WSL)
test -f "$HOME/.canghe-skills/canghe-markdown-to-html/EXTEND.md" && echo "user"

┌──────────────────────────────────────────────────────────────┬───────────────────┐ │ Path │ Location │ ├──────────────────────────────────────────────────────────────┼───────────────────┤ │ .canghe-skills/canghe-markdown-to-html/EXTEND.md │ Project directory │ ├──────────────────────────────────────────────────────────────┼───────────────────┤ │ $HOME/.canghe-skills/canghe-markdown-to-html/EXTEND.md │ User home │ └──────────────────────────────────────────────────────────────┴───────────────────┘

┌───────────┬───────────────────────────────────────────────────────────────────────────┐ │ Result │ Action │ ├───────────┼───────────────────────────────────────────────────────────────────────────┤ │ Found │ Read, parse, apply settings │ ├───────────┼───────────────────────────────────────────────────────────────────────────┤ │ Not found │ Use defaults │ └───────────┴───────────────────────────────────────────────────────────────────────────┘

EXTEND.md Supports: Default theme | Custom CSS variables | Code block style

Workflow

Step 0: Pre-check (Chinese Content)

Condition: Only execute if input file contains Chinese text.

Detection:

1. Read input markdown file
2. Check if content contains CJK characters (Chinese/Japanese/Korean)
3. If no CJK content → skip to Step 1

Format Suggestion:

If CJK content detected AND canghe-format-markdown skill is available:

Use AskUserQuestion to ask whether to format first. Formatting can fix:

• Bold markers with punctuation inside causing ** parse failures
• CJK/English spacing issues

If user agrees: Invoke canghe-format-markdown skill to format the file, then use formatted file as input.

If user declines: Continue with original file.

Step 1: Confirm Theme

Before converting, use AskUserQuestion to confirm the theme (unless user already specified):

| Theme | Description | |-------|-------------| | default (Recommended) | 经典主题 - 传统排版，标题居中带底边，二级标题白字彩底 | | grace | 优雅主题 - 文字阴影，圆角卡片，精致引用块 | | simple | 简洁主题 - 现代极简风，不对称圆角，清爽留白 |

Step 2: Convert

bash
npx -y bun ${SKILL_DIR}/scripts/main.ts <markdown_file> --theme <theme>

Step 3: Report Result

Display the output path from JSON result. If backup was created, mention it.

Usage

bash
npx -y bun ${SKILL_DIR}/scripts/main.ts <markdown_file> [options]

Options:

| Option | Description | Default | |--------|-------------|---------| | --theme <name> | Theme name (default, grace, simple) | default | | --title <title> | Override title from frontmatter | | | --keep-title | Keep the first heading in content | false (removed) | | --help | Show help | |

Examples:

bash
# Basic conversion (uses default theme, removes first heading)
npx -y bun ${SKILL_DIR}/scripts/main.ts article.md

# With specific theme
npx -y bun ${SKILL_DIR}/scripts/main.ts article.md --theme grace

# Keep the first heading in content
npx -y bun ${SKILL_DIR}/scripts/main.ts article.md --keep-title

# Override title
npx -y bun ${SKILL_DIR}/scripts/main.ts article.md --title "My Article"

Output

File location: Same directory as input markdown file.

• Input: /path/to/article.md
• Output: /path/to/article.html

Conflict handling: If HTML file already exists, it will be backed up first:

• Backup: /path/to/article.html.bak-YYYYMMDDHHMMSS

JSON output to stdout:

json
{
  "title": "Article Title",
  "author": "Author Name",
  "summary": "Article summary...",
  "htmlPath": "/path/to/article.html",
  "backupPath": "/path/to/article.html.bak-20260128180000",
  "contentImages": [
    {
      "placeholder": "MDTOHTMLIMGPH_1",
      "localPath": "/path/to/img.png",
      "originalPath": "imgs/image.png"
    }
  ]
}

Themes

| Theme | Description | |-------|-------------| | default | 经典主题 - 传统排版，标题居中带底边，二级标题白字彩底 | | grace | 优雅主题 - 文字阴影，圆角卡片，精致引用块 (by @brzhang) | | simple | 简洁主题 - 现代极简风，不对称圆角，清爽留白 (by @okooo5km) |

Supported Markdown Features

| Feature | Syntax | |---------|--------| | Headings | # H1 to ###### H6 | | Bold/Italic | **bold**, *italic* | | Code blocks | lang with syntax highlighting | | Inline code | code | | Tables | GitHub-flavored markdown tables | | Images | !alt | | Links | text with footnote references | | Blockquotes | > quote | | Lists | - unordered, 1. ordered | | Alerts | > !NOTE], > !WARNING], etc. | | Footnotes | ^1] references | | Ruby text | {base|annotation} | | Mermaid | mermaid diagrams | | PlantUML | plantuml diagrams |

Frontmatter

Supports YAML frontmatter for metadata:

yaml
---
title: Article Title
author: Author Name
description: Article summary
---

If no title is found, extracts from first H1/H2 heading or uses filename.

Extension Support

Custom configurations via EXTEND.md. See Preferences section for paths and supported options.