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Cross Platform Content Syncer — AI Agent Skill | BytesAgain

📖 About This Skill

name: cross-platform-content-syncer description: "Publish content once, distribute everywhere—sync WordPress, Substack, Medium, and LinkedIn automatically. Use when the user needs multi-channel publishing, content distribution, or unified editorial workflows." version: 1.0.0 homepage: https://github.com/ncreighton/empire-skills metadata: { "openclaw": { "requires": { "env": [ "WORDPRESS_API_KEY", "WORDPRESS_SITE_URL", "SUBSTACK_API_KEY", "MEDIUM_API_TOKEN", "LINKEDIN_ACCESS_TOKEN", "SLACK_WEBHOOK_URL" ], "bins": ["curl", "jq"] }, "os": ["macos", "linux", "win32"], "files": ["SKILL.md"], "emoji": "🔄" } }

Overview

The Cross-Platform Content Syncer eliminates manual republishing across your content ecosystem. Write once in your primary platform (WordPress, Substack, Medium, or LinkedIn), and automatically sync to all others with intelligent formatting, SEO optimization, and platform-specific metadata.

This skill is built for:

Content creators managing multiple audiences across platforms

Marketing teams distributing thought leadership at scale

Newsletter publishers expanding reach without duplicate work

B2B companies maintaining consistent messaging across channels

Why It Matters

Content distribution typically requires 4-5 manual steps per platform (copy, reformat, add metadata, preview, publish). This skill automates that workflow, saving 30-45 minutes per article while ensuring consistency and SEO best practices.

Supported Integrations:

WordPress (REST API v2)

Substack (Email + Web)

Medium (Partner Program API)

LinkedIn (Content Distribution API)

Slack (notifications)

Google Drive (backup)

Quick Start

Try these prompts immediately:

Example 1: Sync a WordPress post to all platforms

Sync my latest WordPress article "10 AI Tools for Content Creators" to Substack, 
Medium, and LinkedIn. Add LinkedIn hashtags, optimize for Medium's audience, 
and notify me on Slack when complete.

Example 2: Schedule content across platforms with delays

I have a blog post ready. Publish to Substack first (immediately), then Medium 
(24 hours later), then LinkedIn (48 hours later). Add platform-specific CTAs 
and track engagement metrics.

Example 3: Batch sync multiple articles

Sync my last 5 published WordPress articles to Medium. Skip articles published 
before January 2024. Preserve all images, add author bio, and create a Google 
Sheet tracking which articles synced where.

Example 4: Sync with content transformation

Take my Substack newsletter draft, convert it to a LinkedIn article (add 
professional formatting), a Medium post (add SEO keywords), and a WordPress 
blog post (add related posts). Include platform-specific metadata.

Capabilities

1. Multi-Platform Publishing

WordPress: Direct REST API publishing with featured images, categories, tags, and SEO metadata

Substack: Email distribution + web archive with subscriber list segmentation

Medium: Partner program publishing with canonical URLs and publication selection

LinkedIn: Article publishing with formatting, hashtags, and engagement tracking

2. Intelligent Content Transformation

Auto-convert formatting (Markdown → HTML → Platform-specific)

Preserve and optimize images across platforms

Generate platform-specific headlines and descriptions

Add platform-appropriate CTAs (Subscribe, Follow, Read More)

Maintain internal link structure with redirects

3. SEO & Metadata Management

Auto-generate meta descriptions for each platform

Add relevant hashtags (#content, #marketing, #ai)

Create canonical URLs to prevent duplicate content penalties

Optimize keyword density per platform algorithm

Generate Open Graph tags for social sharing

4. Scheduling & Workflow

Publish immediately or schedule for specific dates/times

Stagger publication across platforms (e.g., 24-48 hour delays)

Create content calendars visible in Slack

Queue management with priority levels

Automatic retry on failed syncs (with exponential backoff)

5. Analytics & Tracking

Track views, engagement, and clicks per platform

Generate weekly performance reports

Identify top-performing platforms for your content

Monitor comment/response threads across platforms

Export metrics to Google Sheets or Data Studio

6. Content Backup & Version Control

Auto-backup all synced content to Google Drive

Maintain version history (rollback capability)

Archive original + synced versions

Compare formatting across platforms

Configuration

Required Environment Variables

Set these in your .env file or ClawHub secrets:

# WordPress
WORDPRESS_SITE_URL="https://yourblog.com"
WORDPRESS_API_KEY="your-application-password"
Substack
SUBSTACK_API_KEY="sk_live_xxxxxxxxxxxx"
Medium
MEDIUM_API_TOKEN="your-medium-integration-token"
LinkedIn
LINKEDIN_ACCESS_TOKEN="your-oauth-access-token"
LINKEDIN_ORGANIZATION_ID="12345678"
Slack (optional, for notifications)
SLACK_WEBHOOK_URL="https://hooks.slack.com/services/YOUR/WEBHOOK/URL"
Google Drive (optional, for backups)
GOOGLE_DRIVE_FOLDER_ID="your-folder-id"
GOOGLE_SERVICE_ACCOUNT_JSON="path/to/service-account.json"

Configuration Options

sync_config:
  source_platform: "wordpress"  # wordpress, substack, medium, linkedin
  target_platforms: ["substack", "medium", "linkedin"]
  
  # Scheduling
  publish_immediately: false
  schedule_delays:
    substack: 0  # hours
    medium: 24
    linkedin: 48
  
  # Content transformation
  preserve_formatting: true
  add_platform_ctc: true
  generate_seo_metadata: true
  
  # Notifications
  notify_slack: true
  notify_email: "your@email.com"
  
  # Analytics
  track_engagement: true
  report_frequency: "weekly"

Example Outputs

Output 1: Sync Confirmation

✅ Cross-Platform Sync Complete Article: "10 AI Tools for Content Creators" Source: WordPress (ID: 1247) Synced: 3/3 platforms Platform Status URL Published ───────────────────────────────────────────────────────────────────── Substack ✓ substack.com/@yourname/ai-tools 2024-01-15 Medium ✓ medium.com/@yourname/ai-tools 2024-01-16 LinkedIn ✓ linkedin.com/feed/update/... 2024-01-17

Next Steps: → View analytics dashboard: https://clawhub.app/sync/1247 → Share LinkedIn post: https://linkedin.com/feed/update/... → Check Slack for engagement updates

Output 2: Weekly Engagement Report

📊 Weekly Content Performance (Jan 8-14, 2024) Top Performer: "AI Tools" article ├─ WordPress: 3,240 views | 127 comments ├─ Medium: 1,850 views | 43 claps ├─ LinkedIn: 4,120 impressions | 89 reactions └─ Substack: 2,310 opens | 340 clicks Platform Insights: • LinkedIn: Best for B2B thought leadership (+15% engagement vs. last week) • Medium: Growing audience in tech category (+8% followers) • Substack: Highest click-through rate (14.7%)

Recommendations: → Increase LinkedIn publishing frequency (2x/week) → Add more technical depth for Medium audience → Segment Substack content by subscriber interest

Output 3: Content Transformation Example

Original WordPress Post: ───────────────────────── Title: "10 AI Tools for Content Creators" Length: 2,100 words Images: 5 Format: Blog post with sections and code blocks Transformed for Medium: ───────────────────────── Title: "10 AI Tools That Changed How I Create Content" (optimized for engagement) Length: 2,050 words (trimmed for Medium's preferred length) Images: 5 (auto-optimized for mobile) Format: Article with pull quotes and highlighted sections Canonical URL: https://yourblog.com/ai-tools Transformed for LinkedIn: ───────────────────────── Title: "10 AI Tools Every Content Creator Should Know in 2024" (keyword-optimized) Length: 850 words (summarized for LinkedIn) Images: 3 (best-performing visuals) Format: Article with professional formatting Hashtags: #AI #ContentCreation #ProductivityTools #MarketingTech CTA: "What's your favorite AI tool? Drop it in the comments."

Transformed for Substack: ───────────────────────── Title: "10 AI Tools I'm Using This Month (+ Free Alternatives)" (curiosity-driven) Length: 2,100 words (full version for email) Images: 5 (full resolution for email clients) Format: Newsletter with personal narrative CTA: "Share this with a creator friend who needs this."

Tips & Best Practices

1. Choose the Right Source Platform

WordPress: Best for long-form, SEO-focused content

Substack: Best for newsletter-first audiences

Medium: Best for technical/niche content

LinkedIn: Best for industry insights and thought leadership

Pro tip: Use WordPress as your primary source—it has the most flexibility and SEO power.

2. Optimize for Each Platform's Algorithm

LinkedIn: Use 3-5 industry hashtags, ask engagement questions, publish Tuesday-Thursday 8am-10am

Medium: Add 5-7 topic tags, use compelling first paragraph, aim for 1,500-2,000 words

Substack: Personalize subject lines, include one clear CTA, send at consistent day/time

WordPress: Use target keywords in title and first 100 words, add internal links, optimize images

3. Stagger Publication Timing

Don't publish to all platforms simultaneously. Stagger by 24-48 hours:

Day 1: WordPress (primary, builds SEO authority)

Day 2: Substack (builds email subscriber engagement)

Day 3: Medium (captures search traffic)

Day 4: LinkedIn (maximizes professional reach)

This prevents algorithmic penalties for duplicate content and maximizes visibility across platforms.

4. Use Platform-Specific CTAs

WordPress: "Subscribe to my newsletter" (convert to email list)

Substack: "Share this with a colleague" (grow subscriber base)

Medium: "Follow for more insights" (build Medium following)

LinkedIn: "What's your take?" (drive engagement)

5. Monitor Platform-Specific Metrics

Track what matters on each platform:

WordPress: Traffic, bounce rate, time on page, conversions

Substack: Open rate, click rate, subscriber growth

Medium: Claps, reading time, follower growth

LinkedIn: Impressions, engagement rate, profile visits

6. Batch Your Content

Sync content in batches (weekly or monthly) rather than one-off articles. This reduces API calls, improves efficiency, and allows for better scheduling.

7. Maintain Canonical URLs

Always set WordPress as the canonical source. This tells search engines which version is the "original," preserving SEO value.

Safety & Guardrails

What This Skill Will NOT Do

No unauthorized republishing: Requires explicit user confirmation before syncing

No plagiarism: Does not copy content from other creators without attribution

No spam distribution: Respects platform ToS (no artificial engagement boosting)

No data scraping: Does not collect reader data beyond what platforms provide via API

No content modification without consent: Preserves original message (only formats for platform)

No cross-posting without canonical URLs: Always maintains canonical source to avoid SEO penalties

Limitations & Boundaries

1. Platform API Rate Limits - WordPress: 10 requests/second - Substack: 100 requests/hour - Medium: 50 requests/hour - LinkedIn: 100 requests/day - Skill will queue excess requests and retry automatically

2. Content Type Restrictions - Video content: Links only (platforms don't support direct video uploads via API) - Paywalled content: Cannot sync to free platforms (respects Medium's Partner Program rules) - Sensitive content: Requires manual review before syncing

3. Image Handling - Max 50MB per image - Supported formats: JPG, PNG, WebP, GIF - Skill auto-optimizes for each platform's requirements

4. Authentication - Tokens expire and must be refreshed manually (set calendar reminders) - Multi-factor authentication required for all platforms - API keys stored in encrypted vault (never logged or exposed)

5. Content Approval - Drafts must be explicitly published (no auto-publish from drafts) - Scheduled content requires 15-minute review window before publish - Bulk syncs limited to 50 articles per batch

Troubleshooting

Common Issues & Solutions

#### Issue 1: "Authentication Failed - Invalid Token" Cause: API token expired or incorrect credentials Solution: 1. Verify token in ClawHub secrets dashboard 2. Regenerate token on the platform (Settings → API/Integrations) 3. Update WORDPRESS_API_KEY, MEDIUM_API_TOKEN, etc. in .env 4. Test connection: curl -H "Authorization: Bearer YOUR_TOKEN" https://api.platform.com/me 5. Retry sync

#### Issue 2: "Rate Limit Exceeded" Cause: Too many requests to platform API Solution: 1. Skill automatically queues requests—no action needed for single articles 2. For bulk syncs: Reduce batch size from 50 to 25 articles 3. Increase delay between platform syncs (e.g., 48-72 hours instead of 24) 4. Check platform API status: https://status.medium.com, https://status.substack.com

#### Issue 3: "Images Not Syncing" Cause: Image URL broken, unsupported format, or file size exceeds limit Solution: 1. Verify image URLs are publicly accessible (not behind login) 2. Check image format (JPG, PNG, WebP, GIF only) 3. Compress images if >5MB: Use ImageOptim (Mac) or TinyPNG (web) 4. Re-upload images to WordPress and retry sync 5. View sync logs: clawhub logs cross-platform-content-syncer --tail 50

#### Issue 4: "Formatting Broken on Medium/LinkedIn" Cause: HTML conversion error or unsupported formatting Solution: 1. Check source content for complex HTML (tables, nested lists, iframes) 2. Simplify formatting: Use bold/italic only, avoid custom CSS 3. Test sync with simpler article first 4. Enable "preserve_formatting: false" to auto-clean HTML 5. Contact support with screenshot: support@clawhub.app

#### Issue 5: "Slack Notifications Not Arriving" Cause: Invalid webhook URL or Slack workspace permissions Solution: 1. Verify SLACK_WEBHOOK_URL in .env (should start with https://hooks.slack.com) 2. Check Slack app permissions: Settings → Manage Apps → ClawHub → Permissions 3. Test webhook manually:

   curl -X POST -H 'Content-type: application/json' \
     --data '{"text":"Test message"}' \
     YOUR_WEBHOOK_URL

4. Regenerate webhook if needed: Slack → Integrations → Incoming Webhooks 5. Verify notify_slack: true in config

FAQ

Q: Can I sync to only some platforms, not all? A: Yes. In config, set target_platforms: ["medium", "linkedin"] to sync only to those.

Q: What happens if one platform fails—do the others still sync? A: Yes. Skill syncs to each platform independently. If Medium fails, WordPress/Substack/LinkedIn still publish. Retry failed platforms automatically after

💡 Examples