Social Media Caption Generator — Claude Skill

Social media caption generator for Claude Code. Turn any text, script, screenshot, or competitor post into ready-to-post captions for all 7 major platforms — optimized for the signals each algorithm actually rewards.

This is the actual Claude skill I use to caption every post on @roman.knox (280K+ followers). One prompt in. Captions for Instagram, TikTok, Threads, Facebook, YouTube Shorts out.

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What it does

Send it anything:

• A script or raw notes
• A screenshot or image of your post
• A competitor's viral post (it'll write something better)
• A brief description of your content
• A link to an article you're repurposing

You get back ready-to-copy captions for 7 formats, each using a different proven formula:

1. Instagram Reels — hook-first, optimized for DM shares
2. Instagram Carousel — longer, save-optimized
3. TikTok — 80-char hook, completion-rate language
4. Threads — conversation starter, reply-optimized
5. Facebook Page/Personal — trigger-word-free for max reach
6. Facebook Group — community tone, discussion question
7. YouTube Shorts — title + description, search-keyword-optimized

Each caption comes with a breakdown: formula name, hook type, CTA type, and which algorithm signal it optimizes for.

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Why every platform needs a different caption

Most creators copy-paste the same caption to every platform. That's why their reach dies on 6 of the 7.

Every algorithm rewards different signals in 2026:

| Platform | #1 signal | Dead signal | |---|---|---| | Instagram Reels | DM shares | Likes | | Instagram Carousel | Saves | Likes | | TikTok | Completion rate (70%+) | Hashtag spam | | Threads | Replies | Cross-posted content | | Facebook Page | 40-80 char posts | Trigger words (-70% reach) | | Facebook Group | Discussion questions | Links | | YouTube Shorts | Title SEO + retention | Clickbait |

This skill bakes all of that into the output. No #fyp. No #viral. No engagement bait. No Facebook trigger words. No copy-paste.

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Install

# Clone into your Claude skills folder
cd ~/.claude/skills
git clone https://github.com/rediumvex/social-media-caption-generator-claude.git social-captions

Restart Claude Code. The skill is available as /social-captions.

If you use gstack

cd ~/.claude/skills/gstack
git clone https://github.com/rediumvex/social-media-caption-generator-claude.git social-captions

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Usage

Just send Claude the material — it figures out the rest:

/social-captions here's my reel script: [paste script]

/social-captions [paste screenshot of your carousel]

/social-captions competitor post crushing right now: [url or text]

/social-captions topic: "how to use Claude skills for SEO blog posts"

You get back all 7 platforms, each with:

• Ready-to-paste caption text
• 3-5 niche hashtags (never generic)
• Formula breakdown
• Hook type
• CTA type
• Signal being optimized

Then you pick, tweak, post.

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What's inside (highlights)

The skill encodes the full 2026 algorithm playbook:

• 30+ caption formulas across reach, engagement, sales, and growth goals
• Hook library — provocation, curiosity, value, emotion, TikTok-specific
• Platform-specific length rules (IG Reels 80-200 chars, FB Page 40-80, TikTok 100-300, etc.)
• Anti-patterns — engagement bait, shadow ban triggers, format crimes
• Power words library by category (urgency, trust, exclusivity, emotion)
• Facebook trigger word replacements — "FREE" → "complimentary", etc.
• Signal hierarchy — shares > saves > comments > watch time > likes

All based on what's actually shipping results in 2026, not 2020 best practices.

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Who built this

I'm Roman Knox. I run the Instagram @roman.knox — 280K+ followers posting daily about AI, Claude Code, n8n, and automation.

I built this skill because I was spending 30 minutes per post writing captions for each platform separately. Now it's one prompt, 7 platforms, done.

• 🎓 Join Knox Community on Skool — n8n library, cold outreach systems, Claude skills, and the weekly live sessions
• 📸 Instagram — @roman.knox
• 📚 Knox Hub — knoxhub.io
• 🤖 My other Claude skills — SEO Blog Writer, AI Video Generator

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License

MIT — do whatever you want with it. Fork it, modify it, ship it in your product. If it helps, a ⭐ on the repo is appreciated.