Markdown to HTML Converter Skill

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):

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

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

┌──────────────────────────────────────────────────────────────┬───────────────────┐ │ Path │ Location │ ├──────────────────────────────────────────────────────────────┼───────────────────┤ │ .baoyu-skills/baoyu-markdown-to-html/EXTEND.md │ Project directory │ ├──────────────────────────────────────────────────────────────┼───────────────────┤ │ $HOME/.baoyu-skills/baoyu-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:

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

Format Suggestion:

If CJK content detected AND baoyu-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 baoyu-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

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

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:

# 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:

{
  "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](src) | | Links | [text](url) 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:

---
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.

Agent Skills: Markdown to HTML Converter

Install this agent skill to your local

Skill Files