Platforms: X (Twitter)
Guides X post copy creation and optimization. Use for generating publish-ready posts, threads, and content that performs on X. Suitable for copy agents, design agents (image specs), and video agents (video post specs).
When invoking: On first use, if helpful, open with 1-2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.
Output: Publish-Ready Copy
This skill enables agents to generate X post copy that can be published directly. Output includes character-counted text, thread structure, and platform-compliant formatting.
Character Limits
| Type | Limit | Notes |
|---|---|---|
| Standard post | 280 characters | Most users |
| Premium | 25,000 characters | X Premium subscribers |
| URL | Counts as 23 chars | t.co shortens all links |
| Emoji | ~2 chars each | Varies by emoji |
Optimal Lengths (Engagement)
| Use Case | Characters | Purpose |
|---|---|---|
| General | 71-100 | Sweet spot for engagement |
| Promotional | 120-130 | Product/offer posts |
| Question | 60-80 | Drive replies |
| Retweet-friendly | ~116 | Leaves room for "RT @user:" |
Thread Format
- Structure: 3-5 connected posts; number as 1/5, 2/5, etc.
- First post: Strong hook; no "thread" in first line
- Last post: CTA, summary, or question
- Each post: ~80 chars; can stand alone
Post Structure (Hook + Value + CTA)
| Part | Ratio | Guideline |
|---|---|---|
| Hook | 10% | First 1-2 lines; question, fact, or emotion; ~50 chars |
| Value | 70% | Practical info; use thread for depth |
| CTA | 20% | Call for reply, question, or action |
End with open question to drive replies. Thread structure can extend impressions ~10x.
Algorithm (Grok AI)
Signal Weights
| Signal | Impact |
|---|---|
| Replies | Highest (~54-75x likes); quality > quantity |
| Author replies | Active reply chains ~75x visibility |
| Bookmark | 2026 signal; saves boost recommendation |
| Media | Images/video ~2x; video 2-4x exposure |
| External links | Reduce score ~50%; prefer internal refs |
| Post limit | 5-8/day; >10/day reduces later visibility ~80% |
Content: Open questions, controversial views, stories; avoid "RT if agree" bait.
TweepCred
| Threshold | Effect |
|---|---|
| < 65 | Only last 3 posts enter For You |
| New accounts | Need +17 to appear in feed |
| Blue V | Auto 100 points |
Monitor account health; avoid spam, bulk ops, excessive links.
Distribution
Posts tested in small group first; early interaction (first 30 min) decides reach. Niche consistency helps SimClusters match.
Link Optimization
| Practice | Guideline |
|---|---|
| Penalty | External links ~-50%; Regular accounts: link posts 0% engagement since 2025 |
| Placement | Put link in reply, not main post |
| Ratio | Max 1 link per 5 posts |
| Premium | Premium+ safest for links (~0.25-0.3% engagement) |
| Preview | Title <60 chars, description <100 chars; 1200x628 image |
Premium Impact
| Tier | Reach | Link posts |
|---|---|---|
| Regular | <100/post | 0% engagement |
| Premium ($8) | ~600/post | ~0.25-0.3% |
| Premium+ ($40) | ~1550/post | Safest for links |
Premium ~10x reach vs Regular. If X is core channel, Premium helps.
Video
- Exposure: 2-4x vs text
- Length: 8-30s short video preferred
- VQV: High video completion boosts score 2-3x
Content Ratio
| Type | Share | Use |
|---|---|---|
| Value | 70% | Education, how-to, insights |
| Interaction | 20% | Polls, questions, AMA |
| Promo | 10% | Product, offers |
Twitter Cards + SEO
Cards (og:image, title, description) boost CTR ~64%, engagement ~26%. Use for Social SEO and Programmatic SEO; X traffic can accelerate Google indexing.
Image Specs (for Design Agents)
| Format | Dimensions | Use |
|---|---|---|
| Single image | 1200×675 (16:9) | Best visibility; no crop |
| Square | 800×800 | Single image |
| Profile | 400×400 | Avatar |
| Header | 1500×500 (3:1) | Banner |
| File | ~5MB; JPG/PNG | Over 5MB may compress |
Output Format
When generating X copy, provide:
- Post text with character count
- Hashtags (if used; 1-3 recommended)
- Thread structure (if thread)
- Image specs (if design agent needs dimensions)
Related Skills
- channels-influencer: X is key influencer platform
- platforms-reddit: Alternative community channel
- seo-on-page-open-graph, seo-on-page-twitter-cards: OG and Twitter Card tags for X link previews