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