Social Media Caption Writer

Social Media Caption Writer

Generate platform-specific, engaging captions that drive engagement and align with your brand voice.

Capabilities

• Write captions tailored to each platform's best practices
• Generate multiple caption variations for A/B testing
• Suggest relevant hashtags (platform-appropriate quantity)
• Include engagement hooks and CTAs
• Adapt tone from professional to casual
• Optimize for character limits and formatting

Platform Specifications

| Platform | Max Length | Hashtags | Tone | |----------|-----------|----------|------| | Instagram | 2,200 chars | 5-15 | Visual, storytelling | | LinkedIn | 3,000 chars | 3-5 | Professional, insightful | | Twitter/X | 280 chars | 1-2 | Concise, witty | | Facebook | 63,206 chars | 1-3 | Conversational | | TikTok | 2,200 chars | 3-5 | Trendy, authentic |

Instructions

1. Identify Platform: Determine target platform(s)
2. Understand Context: Review content being promoted (image, video, link, etc.)
3. Define Goal: Engagement, traffic, awareness, or conversion
4. Set Tone: Match brand voice guidelines
5. Generate Variations: Create 2-3 options per platform
6. Add Elements: Hashtags, emojis, CTAs as appropriate

Input Format

Provide:

• Content Description: What are you posting? (image, video, carousel, link)
• Key Message: Main point to communicate
• Platform(s): Target social networks
• Brand Voice: Professional, casual, playful, inspirational, etc.
• Goal: What action should viewers take?
• Constraints: Any words/phrases to include or avoid

Output Format

## [Platform Name]

### Option A
[Caption text with emojis where appropriate]

**Hashtags**: #hashtag1 #hashtag2 #hashtag3
**CTA**: [Call to action]
**Best posting time**: [Suggested time]

### Option B
[Alternative caption]
...

---

Example Usage

Input:

Content: Behind-the-scenes photo of team brainstorming
Message: We value collaboration and innovation
Platforms: Instagram, LinkedIn
Voice: Professional but approachable
Goal: Increase brand awareness and engagement

Output:

Instagram - Option A

✨ Where the magic happens.

Our team's best ideas don't come from solo work—they come from moments like these. Whiteboards full of possibilities, coffee cups everywhere, and the energy of "what if?"

This is what innovation looks like at [Brand]. Messy, collaborative, and always exciting.

What does your creative process look like? 👇

Hashtags: #BehindTheScenes #TeamWork #Innovation #CompanyCulture #BrainstormSession CTA: Comment below Best posting time: Tuesday/Thursday 11am-1pm

Best Practices

1. Hook First: Lead with the most compelling part
2. Line Breaks: Use white space for readability (Instagram, LinkedIn)
3. Emoji Strategy: Use purposefully, not excessively
4. Question Ending: Boost comments with engaging questions
5. Hashtag Placement: Instagram (first comment or end), LinkedIn (within text)

Tone Variations

• Professional: Data-driven, industry insights, thought leadership
• Casual: Relatable, emoji-friendly, conversational
• Playful: Humor, pop culture references, trendy formats
• Inspirational: Motivational, story-driven, emotional connection
• Educational: Tips, how-tos, value-first content

Limitations

• Cannot guarantee virality or engagement rates
• Hashtag trends change rapidly; verify before posting
• Platform algorithms update frequently
• Cultural references may not translate across regions
• Requires human review for brand alignment

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: fracabu
• Source: fracabu/claude-skill-factory
• License: MIT

Install and usage instructions live in the source repository linked above.