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#

TypeLimitNotesStandard post280 charactersMost usersPremium25,000 charactersX Premium subscribersURLCounts as 23 charst.co shortens all linksEmoji~2 chars eachVaries by emoji

Optimal Lengths (Engagement)#

Use CaseCharactersPurposeGeneral71-100Sweet spot for engagementPromotional120-130Product/offer postsQuestion60-80Drive repliesRetweet-friendly~116Leaves 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)#

PartRatioGuidelineHook10%First 1-2 lines; question, fact, or emotion; ~50 charsValue70%Practical info; use thread for depthCTA20%Call for reply, question, or action

End with open question to drive replies. Thread structure can extend impressions ~10x.

Algorithm (Grok AI)#

Signal Weights#

SignalImpactRepliesHighest (~54-75x likes); quality > quantityAuthor repliesActive reply chains ~75x visibilityBookmark2026 signal; saves boost recommendationMediaImages/video ~2x; video 2-4x exposureExternal linksReduce score ~50%; prefer internal refsPost limit5-8/day; >10/day reduces later visibility ~80%

Content: Open questions, controversial views, stories; avoid "RT if agree" bait.

TweepCred#

ThresholdEffect**< 65Only last 3 posts enter For YouNew accountsNeed +17 to appear in feedBlue 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#

PracticeGuidelinePenaltyExternal links ~-50%; Regular accounts: link posts 0% engagement since 2025PlacementPut link in reply, not main postRatioMax 1 link per 5 postsPremiumPremium+ safest for links (~0.25-0.3% engagement)PreviewTitle ≤70 chars, description ≤200 chars; 1200×628 image

Premium Impact#

TierReachLink postsRegular<100/post0% engagementPremium ($8)600/post0.25-0.3%Premium+ ($40)~1550/postSafest 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#

TypeShareUseValue70%Education, how-to, insightsInteraction20%Polls, questions, AMAPromo10%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)#

FormatDimensionsUseSingle image1200×675 (16:9)Best visibility; no cropSquare800×800Single imageProfile400×400AvatarHeader1500×500 (3:1)BannerFile~5MB; JPG/PNGOver 5MB may compress

Output Format#

When generating X copy, provide:

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