Converts Markdown to styled HTML with WeChat-compatible themes. Supports code highlighting, math, Mermaid (rendered to PNG via headless Chrome), PlantUML, footnotes, alerts, infographics, and optional bottom citations for external links. Use when user asks for "markdown to
Installs just this skill. Get the whole plugin for auto-invocation.
⚡ How it fires
How this skill gets triggered: by you, by Claude, or both.
Fires itselfClaude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/baoyu-markdown-to-html
👁️ Context preview
The summary Claude sees to decide when to auto-load this skill.
Converts Markdown to styled HTML with WeChat-compatible themes. Supports code highlighting, math, Mermaid (rendered to PNG via headless Chrome), PlantUML, footnotes, alerts, infographics, and optional bottom citations for external links. Use when user asks for "markdown to
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Stars24,056
Forks2,686
LanguageTypeScript
LicenseMIT
📦 Ships with baoyu-skills
</> SKILL.md
baoyu-markdown-to-html.SKILL.md
---name: baoyu-markdown-to-html
description: Converts Markdown to styled HTML with WeChat-compatible themes. Supports code highlighting, math, Mermaid (rendered to PNG via headless Chrome), PlantUML, footnotes, alerts, infographics, and optional bottom citations for external links. Use when user asks for "markdown to html", "convert md to html", "md 转 html", "微信外链转底部引用", or needs styled HTML output from markdown.
version: 1.117.3
metadata:
openclaw:
homepage: https://github.com/JimLiu/baoyu-skills#baoyu-markdown-to-html
requires:
anyBins:
- bun
- npx
---# Markdown to HTML Converter
Converts Markdown files to beautifully styled HTML with inline CSS, optimized for WeChat Official Account and other platforms.
## 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
**Agent Execution**: Determine this SKILL.md directory as `{baseDir}`. Resolve `${BUN_X}` runtime: if `bun` installed → `bun`; if `npx` available → `npx -y bun`; else suggest installing bun. Replace `{baseDir}` and `${BUN_X}` with actual values.
| Script | Purpose |
|--------|---------|
| `scripts/main.ts` | Main entry point |
## Preferences (EXTEND.md)
Check EXTEND.md in priority order — the first one found wins:
**Cross-skill EXTEND.md check** (only if this skill's EXTEND.md has no `default_theme`):
Read `$HOME/.baoyu-skills/baoyu-post-to-wechat/EXTEND.md` if it exists and look for a `default_theme:` line. Use the value if present; otherwise fall through.
**If theme is resolved from EXTEND.md**: Use it directly, do NOT ask the user.
**If no default found**: use `AskUserQuestion` to confirm a theme from the [Themes](#themes) table below.
### Step 1.5: Determine Citation Mode
**Default**: Off. Do not ask by default.
**Enable 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`.
**Behavior 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.
| `--mermaid-width <N>` | Mermaid target display width in CSS px; PNG is rendered at `width × scale` pixels when the diagram is narrower than this | 860 |
| `--mermaid-bg <value>` | Mermaid background: `white`, `transparent`, or `#hex` | white |
**Mermaid rendering**: Code blocks fenced as ` ```mermaid ` are rendered to PNGs via headless Chrome (CDP) and cached at `imgs/.mermaid-cache/mermaid-<hash>.png`. The cache key includes the code, theme, scale, target width, background, and mermaid version. Add `imgs/.mermaid-cache/` to `.gitignore` if you do not want generated diagrams checked in. Requires Chrome/Chromium/Edge on the system; otherwise the block falls back to `<pre class="mermaid">…</pre>` and conversion still succeeds.
## Themes
| Theme | Description |
|-------|-------------|
| `default` | Classic - traditional layout, centered title with bottom border, H2 with white text on colored background |
| Links | `[text](url)`; add `--cite` to move ordinary external links into bottom references |
| Blockquotes | `> quote` |
| Lists | `-` unordered, `1.` ordered |
| Alerts | `> [!NOTE]`, `> [!WARNING]`, etc. |
| Footnotes | `[^1]` references |
| Ruby text | `{base|annotation}` |
| Mermaid | ` ```mermaid ` blocks rendered to local PNG via headless Chrome (cached under `imgs/.mermaid-cache/`); falls back to `<pre class="mermaid">` if Chrome is unavailable or rendering fails |
| 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.
