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 ≤70 chars, description ≤200 chars; 1200×628 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; X traffic can accelerate Google indexing. For programmatic SEO (template + data pages at scale), use programmatic-seo.

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:

1. 1. Post text with character count
2. Hashtags (if used; 1-3 recommended)
3. Thread structure (if thread)
4. Image specs (if design agent needs dimensions)

Related Skills

• - paid-ads-strategy: X (Twitter) Ads for paid promotion; tech audiences, timely content; see Platform Selection
• influencer-marketing: X is key influencer platform
• reddit-posts: Alternative community channel
• programmatic-seo: Programmatic SEO (template + data pages); X traffic can accelerate indexing
• open-graph, twitter-cards: OG and Twitter Card tags for X link previews
• visual-content: Cross-channel visual planning; X image specs in context