Markdown to HTML Converter

Output is HTML with inline CSS, optimized for WeChat Official Account.

User Input Tools

When this skill prompts the user, follow this tool-selection rule (priority order):

1. Prefer built-in user-input tools exposed by the current agent runtime — e.g., AskUserQuestion, request_user_input, clarify, ask_user, or any equivalent.
2. Fallback: if no such tool exists, emit a numbered plain-text message and ask the user to reply with the chosen number/answer for each question.
3. Batching: if the tool supports multiple questions per call, combine all applicable questions into a single call; if only single-question, ask them one at a time in priority order.

Concrete AskUserQuestion references below are examples — substitute the local equivalent in other runtimes.

Script Directory

{baseDir} = this SKILL.md's directory. Resolve ${BUN_X}: bun if installed → else npx -y bun → else suggest installing bun.

Preferences (EXTEND.md)

First found wins:

None found → use defaults.

Supported: default theme, custom CSS variables, code block style, mermaid defaults (mermaid_theme, mermaid_scale, mermaid_background).

Workflow

Step 0: Pre-check (CJK Content)

Only if the input contains CJK characters AND the baoyu-format-markdown skill is available: ask (AskUserQuestion) whether to format first — it fixes ** bold markers broken by inner punctuation and CJK/English spacing. Agree → run baoyu-format-markdown, use the formatted file. Decline → use the original. No CJK → skip to Step 1.

Step 1: Determine Theme

First match wins:

1. User-specified (CLI --theme or conversation)
2. This skill's EXTEND.md default_theme
3. Cross-skill fallback (only if step 2 has none): default_theme: line in $HOME/.baoyu-skills/baoyu-post-to-wechat/EXTEND.md, if it exists
4. None → ask (AskUserQuestion) with the Themes table

Theme from EXTEND.md → use it directly, do NOT ask.

Step 1.5: Determine Citation Mode

Default off; don't ask. Enable (--cite) only if the user explicitly asks for "微信外链转底部引用", "底部引用", "文末引用", or passes --cite. When enabled:

• Ordinary external links are rendered with numbered superscripts and collected under a final 引用链接 section.
• https://mp.weixin.qq.com/... links stay as direct links and are not moved to the bottom.
• Bare links where link text equals URL stay inline.

Step 2: Convert

${BUN_X} {baseDir}/scripts/main.ts <markdown_file> --theme <theme> [--cite]

Step 3: Report Result

Show htmlPath from the JSON result; mention backupPath if a backup was created.

Options

Color Presets:

Examples:

${BUN_X} {baseDir}/scripts/main.ts article.md                                  # default theme, first heading removed
${BUN_X} {baseDir}/scripts/main.ts article.md --theme modern --color red
${BUN_X} {baseDir}/scripts/main.ts article.md --cite --keep-title --title "My Article"

Output

/path/to/article.md → /path/to/article.html (same directory). An existing HTML file is first backed up to /path/to/article.html.bak-YYYYMMDDHHMMSS.

JSON 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"
    }
  ],
  "mermaidImages": [
    {
      "hash": "a1b2c3d4e5f6",
      "localPath": "/path/to/imgs/.mermaid-cache/mermaid-a1b2c3d4e5f6.png",
      "cached": false
    }
  ]
}

Mermaid: ```mermaid blocks are rendered to PNG via headless Chrome (CDP), cached at imgs/.mermaid-cache/mermaid-<hash>.png (key: code, theme, scale, target width, background, mermaid version; suggest adding the dir to .gitignore). Needs Chrome/Chromium/Edge; if unavailable or rendering fails, falls back to <pre class="mermaid">…</pre> and conversion still succeeds.

Themes

Supported Markdown Features

Standard GFM (headings, emphasis, lists, tables, images, links, blockquotes, inline code) plus:

Frontmatter

title, author, description (summary). No title → first H1/H2, else filename.

Extension Support

Custom configuration via EXTEND.md — see Preferences.