md2wechat - Claude MCP Skill

# MD to WeChat

Converts Markdown articles to WeChat Official Account formatted HTML with inline CSS and optionally uploads to draft box. Supports two modes:

- **API Mode**: Fast conversion using md2wechat.cn API
- **AI Mode**: Beautiful themed layouts powered by Claude AI

## Quick Start

```bash
# Preview HTML (API mode, fast)
bash skills/md2wechat/scripts/run.sh convert article.md --preview

# Preview HTML (AI mode, themed)
bash skills/md2wechat/scripts/run.sh convert article.md --mode ai --theme autumn-warm --preview

# Upload to WeChat draft box
bash skills/md2wechat/scripts/run.sh convert article.md --draft --cover cover.jpg
```

### Natural Language Image Generation

You can also ask me to generate images using natural language:

#### Generate Image for Article (Insert into Markdown)

```
"Help me generate a product concept image at the beginning of article.md"
"Add an image showing the product features after the second paragraph"
"Create a diagram for the comparison section in article.md"
```

I will:
1. Read the article to understand the context
2. Insert the AI image generation syntax at the appropriate location
3. Call the conversion command to generate and upload the image

#### Generate Standalone Image (Not for Article)

```
"Generate an image of a cute cat sitting on a windowsill"
"Create a product concept image: modern smart home device, white design"
"Make a diagram showing the user flow"
```

I will:
1. Call the image generation command directly
2. Return the generated image URL and WeChat material ID

### Natural Language Writing Assistance

You can also ask me to help write articles using creator styles:

#### Write Article from Idea

```
"Write an article about self-discipline using Dan Koe style"
"Help me write a post about productivity with a sharp, grounded tone"
"Create a story-style article about my travel experience"
```

I will:
1. Understand your idea or topic
2. Use the appropriate writing style (default: Dan Koe)
3. Generate article structure and content
4. Extract memorable quotes
5. Optionally generate matching cover image

#### Refine Existing Content

```
"Rewrite this article with a more engaging style"
"Polish my article.md with Dan Koe's writing style"
"Make this content more profound and sharp"
```

I will:
1. Read your existing content
2. Apply the selected writing style
3. Maintain original meaning while improving expression

#### Generate Cover Only

```
"Generate a cover image for my article about self-discipline"
"Create a Victorian woodcut style cover for my philosophy piece"
```

#### AI Writing Trace Removal (Humanizer)

```
"Remove AI traces from this article: article.md"
"Humanize this text to make it sound more natural"
"Remove AI writing traces with gentle intensity"
"Rewrite this to sound less like AI generated"
```

I will:
1. Read the text to identify AI writing patterns (24 types)
2. Remove or rewrite problematic phrases
3. Inject natural human-like expressions
4. Preserve core meaning and tone
5. Return quality score (5 dimensions, /50)

**Humanizer can be combined with writing styles:**
```
"Write with Dan Koe style and remove AI traces"
"Use dan-koe style, then humanize the result"
```

#### List Available Styles

```
"Show me all available writing styles"
"What writing styles can I use?"
```

**Available Writing Styles:**
- **Dan Koe** (default): Profound, sharp, grounded - great for personal growth and opinion pieces

Users can add custom styles in `writers/` directory. See `writers/README.md` for details.

## Workflow Checklist

Copy this checklist to track progress:

```
Progress:
- [ ] Step 1: Analyze Markdown structure and images
- [ ] Step 2: Confirm conversion mode (API/AI) and theme
- [ ] Step 3: Generate HTML with inline CSS
- [ ] Step 4: Process images (upload to WeChat)
- [ ] Step 5: Replace image URLs in HTML
- [ ] Step 6: Preview or upload to draft
```

---

## Step 1: Analyze Markdown

Read the markdown file and extract:

| Element | How to Extract |
|---------|----------------|
| **Title** | First `# heading` or filename |
| **Author** | Look for `Author:` or `作者:` in frontmatter |
| **Digest** | First paragraph or generate from content (max 120 chars) |
| **Images** | Collect all `![alt](src)` references |
| **Structure** | Headings, lists, code blocks, quotes, tables |

**Image Reference Types**:

| Type | Syntax | Processing |
|------|--------|------------|
| Local | `![alt](./path/image.png)` | Upload to WeChat |
| Online | `![alt](https://example.com/image.png)` | Download then upload |
| AI Generate | `![alt](__generate:prompt__)` | Generate via AI then upload |

---

## Step 2: Confirm Mode and Theme

### Conversion Mode

| Mode | Speed | Style | Best For |
|------|-------|-------|----------|
| **API** | Fast (seconds) | Clean, standard | Quick publishing, technical content |
| **AI** | Slower (10-30s) | Beautiful themed | Important articles, brand content |

### AI Themes

| Theme | Description | Best For |
|-------|-------------|----------|
| **autumn-warm** | Warm orange tones, emotional, literary | Stories, lifestyle, essays |
| **spring-fresh** | Fresh green tones, natural, vibrant | Travel, nature, outdoor |
| **ocean-calm** | Calm blue tones, professional, rational | Tech articles, business analysis |
| **custom** | Use custom prompt | Brand customization |

### API Themes (Fast)

| Theme | Description | Best For |
|-------|-------------|----------|
| **default** | Default theme, clean and professional | General content |
| **bytedance** | ByteDance style | Tech news |
| **apple** | Apple minimalist style | Product reviews |
| **sports** | Active sports style | Sports content |
| **chinese** | Traditional Chinese culture style | Cultural articles |
| **cyber** | Cyberpunk style | Frontier tech |

**Ask the user**: "Which mode and theme would you like?" - Only ask if the user doesn't specify in their request.

- **API mode** (fast): default, bytedance, apple, sports, chinese, cyber
- **AI mode** (themed): autumn-warm, spring-fresh, ocean-calm

**Default**: Use `API mode` if user doesn't specify.

Read detailed style prompts from [references/themes.md](references/themes.md)

---

## Step 3: Generate HTML

### API Mode

Call md2wechat CLI:

```bash
bash skills/md2wechat/scripts/run.sh convert article.md --mode api
```

### AI Mode

Read the selected style prompt from `references/themes.md` and generate HTML with **inline CSS**.

**Important Rules**:

1. All CSS must be **inline** (in `style` attributes)
2. No external stylesheets or scripts
3. Use WeChat-safe HTML tags only
4. Image placeholder format: `<!-- IMG:0 -->`, `<!-- IMG:1 -->`, etc.

**Safe HTML Tags**:
- `<p>`, `<br>`, `<strong>`, `<em>`, `<u>`, `<a>`
- `<h1>` to `<h6>`
- `<ul>`, `<ol>`, `<li>`
- `<blockquote>`, `<pre>`, `<code>`
- `<table>`, `<thead>`, `<tbody>`, `<tr>`, `<th>`, `<td>`
- `<section>`, `<span>` (with inline styles)

**Avoid**:
- `<script>`, `<iframe>`, `<form>`
- External CSS/JS references
- Complex positioning (fixed, absolute)

**Critical for WeChat**:
- Create a main `<div>` container immediately after `<body>` to hold all global styles
- Specify `color` explicitly for each `<p>` tag (WeChat resets to black otherwise)
- Use two `<span>` tags for heading symbols: one with color+text-shadow, one with solid color

---

## Step 4: Process Images

### Image Generation Methods

There are **three ways** to generate AI images:

#### Method 1: Natural Language - For Article (Recommended)

Simply describe what you want in plain language:

```
User: "Generate a product concept image at the beginning of article.md"

User: "Add a comparison chart after the third paragraph"

User: "Create an image showing the workflow diagram in article.md"
```

**How I process natural language requests:**

1. **Understand the intent** - Identify where to insert the image
2. **Read the article** - Analyze context to create an appropriate prompt
3. **Insert the syntax** - Add `![alt](__generate:prompt__)` at the correct location
4. **Show the prompt** - Display the generated prompt for transparency
5. **Generate and upload** - Call the conversion command to complete

**Note**: Proceed directly with generation. Only ask for confirmation if the prompt is complex or ambiguous.

**Example conversation:**

```
User: "Add a product image at the start of my article"
Claude: "I'll add a product concept image at the beginning of article.md.
Based on your article about 'Smart Home Hub', I'll use this prompt:
'A modern smart home hub device, sleek white design with LED indicator
lights, minimalist product photography on a clean white background'
I'll proceed with generating the image."
```

#### Method 2: Natural Language - Standalone Image

Generate an image without any article:

```
User: "Generate an image of a cute cat sitting on a windowsill"
User: "Create a product concept: modern smart home device"
User: "Make a diagram showing user signup flow"
```

**I will:**
1. Create an appropriate prompt based on your description
2. Call: `bash skills/md2wechat/scripts/run.sh generate_image "prompt"`
3. Return the WeChat URL and media ID

**Use when:** You just need an image, not for any article.

#### Method 3: Manual Syntax

Write the image generation syntax directly in Markdown:

```markdown
![Product Concept](__generate:A futuristic smart home hub device, sleek design__)
```

**Syntax format:** `![alt text](__generate:prompt__)`

---

### Processing Images by Type

For each image reference in order:

#### Local Image

```bash
bash skills/md2wechat/scripts/run.sh upload_image "/path/to/image.png"
```

Response:
```json
{"success": true, "wechat_url": "https://mmbiz.qpic.cn/...", "media_id": "xxx"}
```

#### Online Image

```bash
bash skills/md2wechat/scripts/run.sh download_and_upload "https://example.com/image.png"
```

#### AI Generated Image (via CLI)

```bash
# Generate with default size (2048x2048 square)
bash skills/md2wechat/scripts/run.sh generate_image "A cute cat sitting on a windowsill"

# Generate with 16:9 ratio for WeChat cover (recommended)
bash skills/md2wechat/scripts/run.sh generate_image --size 2560x1440 "prompt"
```

**WeChat Cover Images**: For article covers, use 16:9 horizontal ratio (2560x1440 recommended) as it displays better in WeChat's feed and article list. Square images (2048x2048) are cropped in preview.

**Note**: AI image generation requires `IMAGE_API_KEY` environment variable.

**Image Processing Pipeline**:
1. If AI generation: Call image API → get URL
2. If online: Download image to temp
3. If local: Read file
4. Compress if width > 1920px (configurable)
5. Upload to WeChat material API
6. Return `wechat_url` and `media_id`
7. Store result for HTML replacement

---

## Step 5: Replace Image URLs

Replace placeholders in HTML:

```html
<!-- Before -->
<!-- IMG:0 -->
<!-- IMG:1 -->

<!-- After -->
<img src="https://mmbiz.qpic.cn/..." />
<img src="https://mmbiz.qpic.cn/..." />
```

Use the WeChat URLs returned from image processing.

---

## Step 6: Preview or Upload

Ask user:

1. **Preview only** - Show HTML for review
2. **Upload to draft** - Create WeChat draft article

### Preview Mode

Display HTML in markdown code block for user to copy.

### Upload Mode

Create draft and run:

```bash
bash skills/md2wechat/scripts/run.sh convert article.md --draft --cover cover.jpg
```

**Required for draft**:
- `WECHAT_APPID` environment variable
- `WECHAT_SECRET` environment variable
- Cover image (use `--cover` or first image in content)

Response:
```json
{"success": true, "media_id": "draft_media_id", "draft_url": "https://mp.weixin.qq.com/..."}
```

---

## Configuration

### Required for WeChat API

| Variable | Description | Required |
|----------|-------------|----------|
| `WECHAT_APPID` | WeChat Official Account AppID | Yes, for draft upload |
| `WECHAT_SECRET` | WeChat API Secret | Yes, for draft upload |

### Optional for AI Features

| Variable | Description | Required |
|----------|-------------|----------|
| `IMAGE_API_KEY` | Image generation API key | For AI images |
| `IMAGE_API_BASE` | Image API base URL | For AI images |
| `COMPRESS_IMAGES` | Compress images > 1920px (true/false) | No, default true |
| `MAX_IMAGE_WIDTH` | Max width in pixels | No, default 1920 |

### How to Get AppID and Secret

1. Visit [WeChat Developer Platform](https://developers.weixin.qq.com/platform)
2. Login and select your Official Account
3. Go to **Settings & Development** → **Basic Configuration**
4. Find in **Developer ID** section:
   - **Developer ID (AppID)**: Copy directly
   - **Developer Password (AppSecret)**: Click "Reset" to get
5. Add these values to environment variables or config file

> **Warning**: AppSecret is very important, keep it secure!

### Config File Location

```
~/.config/md2wechat/config.yaml    # Global config
./md2wechat.yaml                    # Project config (higher priority)
```

---

## Error Handling

| Error | Action |
|-------|--------|
| Missing config | Ask user to set environment variable or run `md2wechat config init` |
| Image upload fails | Log error, continue with placeholder |
| WeChat API fails | Show error message, return HTML for manual upload |
| Markdown parse error | Ask user to check file format |
| IP not in whitelist | Guide user to add IP to WeChat whitelist (see Troubleshooting) |

---

## Complete Examples

### Example 1: Simple Article (No Images)

**Input**: `simple.md`
```markdown
# My First Article

This is a simple article with no images.
```

**Process**:
1. Generate HTML with API mode
2. Skip image processing
3. Ask: preview or upload?
4. If upload → create draft

### Example 2: Article with Local Images

**Input**: `with-images.md`
```markdown
# Travel Diary

Day 1 in Paris:

![Eiffel Tower](./photos/eiffel.jpg)
```

**Process**:
1. Analyze: 1 local image
2. Generate HTML with `<!-- IMG:0 -->` placeholder
3. Run: `upload_image "./photos/eiffel.jpg"`
4. Replace placeholder with WeChat URL
5. Preview or upload

### Example 3: AI Mode with Theme

**Input**: `story.md`
```markdown
# The Old Library

A story about memories...
```

**Process**:
1. User selects AI mode + autumn-warm theme
2. Read theme prompt from references/themes.md
3. Generate themed HTML with inline CSS
4. Preview or upload

### Example 4: AI Image Generation via Natural Language

**User Request:**
```
"Help me add a product concept image at the beginning of article.md"
```

**Process:**
1. Read article.md to understand the product
2. Create an appropriate image prompt based on context
3. Confirm with user: "I'll use this prompt: '...'"
4. Insert `![Product Concept](__generate:...)` at line 2
5. Run conversion command to generate and upload

**Result:** Image generated and uploaded to WeChat

---

### Example 5: Article with Pre-written Image Syntax

**Input**: `mixed.md`
```markdown
# Tech Review

![Product Photo](./product.jpg)

![Comparison Chart](https://example.com/chart.png)

![Concept Art](__generate:Futuristic gadget design__)
```

**Process:**
1. Process 3 images in order
2. Each returns WeChat URL
3. Replace all placeholders
4. Final HTML with all WeChat-hosted images

---

## References

- [Style Themes](references/themes.md) - Detailed style prompts for AI themes
- [HTML Guide](references/html-guide.md) - WeChat HTML constraints and best practices
- [Image Syntax](references/image-syntax.md) - Image reference syntax and generation
- [Writing Guide](references/writing-guide.md) - Writer style assistant documentation
- [Humanizer](references/humanizer.md) - AI writing trace removal documentation 🆕
- [WeChat API](references/wechat-api.md) - API reference

---

## Troubleshooting

### Configuration Issues

**Q: "AppID not configured" error**
A: Set `WECHAT_APPID` and `WECHAT_SECRET` environment variables, or run:
```bash
bash skills/md2wechat/scripts/run.sh config init
```

**Q: Config file not working**
A: Check config file location. Supported locations:
- `./md2wechat.yaml` (current directory, highest priority)
- `~/.md2wechat.yaml`
- `~/.config/md2wechat/config.yaml`

### Image Issues

**Q: Image upload fails with "invalid filetype"**
A: WeChat supports JPG, PNG, GIF. Ensure image is in correct format:
```bash
# Convert using ImageMagick
convert input.tiff output.jpg
```

**Q: Images not showing in draft**
A: Images must use WeChat-hosted URLs (`mmbiz.qpic.cn`), not external URLs.

**Q: AI image generation fails**
A: Check `IMAGE_API_KEY` is set and API base URL is correct.

### WeChat API Issues

**Q: "IP not in whitelist" error**
A: Add your server IP to WeChat whitelist:

1. Get your public IP:
```bash
curl ifconfig.me
# or
curl ip.sb
```

2. Add IP to WeChat:
   - Visit [WeChat Developer Platform](https://developers.weixin.qq.com/platform)
   - Go to **Settings & Development** → **Basic Configuration**
   - Find **IP Whitelist** section
   - Click "Set" and add your IP
   - Wait a few minutes for changes to take effect

**Q: "access_token expired" error**
A: Program auto-refreshes tokens. If persists:
```bash
# Check config
bash skills/md2wechat/scripts/run.sh config show

# Re-init if needed
bash skills/md2wechat/scripts/run.sh config init
```

**Q: "create draft failed" error**
A: Possible causes:
1. Insufficient permissions - ensure account is verified
2. Sensitive content - check article content
3. Draft limit reached - check existing drafts
4. **Content size out of limit (errcode=45002)** - article content exceeds WeChat API limit

**Q: "content size out of limit" error (errcode=45002)**
A: WeChat draft API has content limits:
- **Characters**: < 20,000 characters (中文算1个字符)
- **Size**: < 1 MB

If you encounter this error:
1. Shorten your article content
2. Reduce unnecessary formatting (inline CSS adds size)
3. Consider splitting into multiple articles
4. Use simpler themes with less inline styling

API mode generates more inline CSS which increases content size. For very long articles, consider manual editing or splitting.

**Q: API rate limit exceeded**
A: WeChat has API limits. Wait and retry:
```bash
# Wait 60 seconds
sleep 60
# Retry
bash skills/md2wechat/scripts/run.sh convert article.md --draft
```

### HTML/Style Issues

**Q: Styles not working in WeChat editor**
A: Check:
1. CSS uses inline `style` attributes (not `<style>` tags)
2. CSS properties are in allowed list (see HTML Guide)
3. No syntax errors (unclosed tags, etc.)

**Q: Background color lost in WeChat**
A: WeChat strips `<body>` styles. Use main container:
```html
<div style="background-color: #faf9f5; padding: 40px 10px;">
  <!-- All content here -->
</div>
```

**Q: Text color not as expected**
A: WeChat resets `<p>` color to black. Always specify:
```html
<p style="color: #4a413d;">Your text here</p>
```

### Command Issues

**Q: "command not found: md2wechat"**
A: The `run.sh` script will auto-download the binary on first run. If you want to install manually:
```bash
# Use the script - it will handle installation
bash skills/md2wechat/scripts/run.sh --help

# Or download from releases
# Visit: https://github.com/geekjourneyx/md2wechat-skill/releases
```

**Q: AI mode very slow**
A: AI mode requires Claude API call and takes 10-30 seconds. For faster results, use API mode.

---

## CLI Commands Reference

All commands go through the `run.sh` wrapper, which handles auto-installation:

```bash
# Show help
bash skills/md2wechat/scripts/run.sh --help

# Convert and preview
bash skills/md2wechat/scripts/run.sh convert article.md --preview

# Convert with AI theme
bash skills/md2wechat/scripts/run.sh convert article.md --mode ai --theme autumn-warm --preview

# Convert and upload to draft
bash skills/md2wechat/scripts/run.sh convert article.md --draft --cover cover.jpg

# Upload single image
bash skills/md2wechat/scripts/run.sh upload_image photo.jpg

# Download and upload online image
bash skills/md2wechat/scripts/run.sh download_and_upload https://example.com/image.jpg

# Generate AI image (requires IMAGE_API_KEY)
bash skills/md2wechat/scripts/run.sh generate_image "A cute cat sitting on a windowsill"

# Generate with 16:9 ratio for WeChat cover (recommended)
bash skills/md2wechat/scripts/run.sh generate_image --size 2560x1440 "prompt"

# Initialize config
bash skills/md2wechat/scripts/run.sh config init

# Show config
bash skills/md2wechat/scripts/run.sh config show

# List available writing styles
bash skills/md2wechat/scripts/run.sh write --list

# Write with creator style (interactive)
bash skills/md2wechat/scripts/run.sh write

# Write with specific style (via stdin/piped)
echo "你的想法或内容" | bash skills/md2wechat/scripts/run.sh write --style dan-koe

# Write with title and heredoc
bash skills/md2wechat/scripts/run.sh write --style dan-koe --title "文章标题" <<EOF
你的内容
EOF

# Write with specific style
bash skills/md2wechat/scripts/run.sh write --style dan-koe

# Generate cover prompt only
bash skills/md2wechat/scripts/run.sh write --style dan-koe --cover-only

# Remove AI writing traces (humanize)
bash skills/md2wechat/scripts/run.sh humanize article.md

# Humanize with intensity
bash skills/md2wechat/scripts/run.sh humanize article.md --intensity aggressive

# Write with humanize
bash skills/md2wechat/scripts/run.sh write --style dan-koe --humanize

# Create image post (小绿书/newspic)
bash skills/md2wechat/scripts/run.sh create_image_post -t "Title" --images photo1.jpg,photo2.jpg

# Extract images from Markdown
bash skills/md2wechat/scripts/run.sh create_image_post -t "Title" -m article.md

# With description and comments
bash skills/md2wechat/scripts/run.sh create_image_post -t "Title" -c "Description" --images photo.jpg --open-comment

# Preview mode (dry-run)
bash skills/md2wechat/scripts/run.sh create_image_post -t "Test" --images a.jpg,b.jpg --dry-run
```

---

## Image Posts (小绿书/Newspic)

Create WeChat image-only posts (小绿书/图片消息) with up to 20 images.

### Natural Language

```
"Create an image post titled 'Weekend Trip' with photos from ./photos/"
"Make a 小绿书 post with travel.md images"
"Upload these images as an image post: a.jpg, b.jpg, c.jpg"
```

### Command Options

| Flag | Short | Description |
|------|-------|-------------|
| `--title` | `-t` | Post title (required) |
| `--content` | `-c` | Description text |
| `--images` | | Comma-separated image paths |
| `--from-markdown` | `-m` | Extract images from Markdown file |
| `--open-comment` | | Enable comments |
| `--fans-only` | | Only fans can comment |
| `--dry-run` | | Preview without uploading |
| `--output` | `-o` | Save result to JSON file |

### Examples

```bash
# Basic image post
bash skills/md2wechat/scripts/run.sh create_image_post \
  -t "Weekend Trip" \
  --images photo1.jpg,photo2.jpg,photo3.jpg

# Extract images from article
bash skills/md2wechat/scripts/run.sh create_image_post \
  -t "Travel Diary" \
  -m article.md

# With description and comments enabled
bash skills/md2wechat/scripts/run.sh create_image_post \
  -t "Food Blog" \
  -c "Today's lunch" \
  --images food.jpg \
  --open-comment

# Read description from stdin
echo "Daily check-in" | bash skills/md2wechat/scripts/run.sh create_image_post \
  -t "Daily" \
  --images pic.jpg

# Preview mode
bash skills/md2wechat/scripts/run.sh create_image_post \
  -t "Test" \
  --images a.jpg,b.jpg \
  --dry-run
```

### Notes

- **Image limit**: Maximum 20 images per post
- **Image format**: JPG, PNG, GIF (same as regular articles)
- **Content**: Plain text only, not HTML
- **Requires**: `WECHAT_APPID` and `WECHAT_SECRET` for upload