baoyu-markdown-to-html

name	baoyu-markdown-to-html
description	Converts Markdown to styled HTML with WeChat-compatible themes. Supports code highlighting, math, PlantUML, footnotes, alerts, and infographics. Use when user asks for "markdown to html", "convert md to html", "md转html", or needs styled HTML output from markdown.

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:

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 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: Determine Theme

Theme resolution order (first match wins):

1. User explicitly specified theme (CLI --theme or conversation)
2. EXTEND.md default_theme (this skill's own EXTEND.md, checked in Step 0)
3. baoyu-post-to-wechat EXTEND.md default_theme (cross-skill fallback)
4. If none found → use AskUserQuestion to confirm

Cross-skill EXTEND.md check (only if this skill's EXTEND.md has no default_theme):

# Check baoyu-post-to-wechat EXTEND.md for default_theme
test -f "$HOME/.baoyu-skills/baoyu-post-to-wechat/EXTEND.md" && grep -o 'default_theme:.*' "$HOME/.baoyu-skills/baoyu-post-to-wechat/EXTEND.md"

If theme is resolved from EXTEND.md: Use it directly, do NOT ask the user.

If no default found: Use AskUserQuestion to confirm:

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
modern	现代主题 - 大圆角、药丸形标题、宽松行距（搭配 --color red 还原传统红金风格）

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, modern)	default
--color <name|hex>	Primary color: preset name or hex value	theme default
--font-family <name>	Font: sans, serif, serif-cjk, mono, or CSS value	theme default
--font-size <N>	Font size: 14px, 15px, 16px, 17px, 18px	16px
--title <title>	Override title from frontmatter
--keep-title	Keep the first heading in content	false (removed)
--help	Show help

Color Presets:

Name	Hex	Label
blue	#0F4C81	经典蓝
green	#009874	翡翠绿
vermilion	#FA5151	活力橘
yellow	#FECE00	柠檬黄
purple	#92617E	薰衣紫
sky	#55C9EA	天空蓝
rose	#B76E79	玫瑰金
olive	#556B2F	橄榄绿
black	#333333	石墨黑
gray	#A9A9A9	雾烟灰
pink	#FFB7C5	樱花粉
red	#A93226	中国红
orange	#D97757	暖橘 (modern default)

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

# Theme with custom color
npx -y bun ${SKILL_DIR}/scripts/main.ts article.md --theme modern --color red

# 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)
modern	现代主题 - 大圆角、药丸形标题、宽松行距（搭配 --color red 还原传统红金风格）

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	
Links	[text](url) with footnote references
Blockquotes	> quote
Lists	- unordered, 1. ordered
Alerts	> [!NOTE], > [!WARNING], etc.
Footnotes	[^1] references
Ruby text	`{base
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.