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Write platform-optimized social media copy for Instagram, Facebook, LinkedIn, and X/Twitter with hooks, CTAs, and hashtag strategies.
Passed 16 of 22 test cases with the skill, and 13 of 22 without it.
and 5 more in the full report
4 fixed12 passed either way5 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
Draft a LinkedIn post announcing our new whitepaper on cybersecurity compliance for financial institutions. Include a call to action driving readers to download the PDF report.
| Checked | Without skill | With skill |
|---|---|---|
| The main LinkedIn post copy avoids putting the direct URL inside the post body, placing it in the comments. | Missed | Passed |
| The LinkedIn post includes between 3 and 5 hashtags. | Missed | Passed |
The instructions your model reads when the skill loads.
IRON LAW: Every Platform Has a Different Tone
The same message posted identically on IG, LinkedIn, Facebook, and X
will underperform on ALL of them. Each platform has different audience
psychology, content format, and algorithm preferences. Adapt the message,
don't just cross-post.
| Platform | Tone | Length | Visual | Best Content |
|---|---|---|---|---|
| Aspirational, visual-first, lifestyle | Caption: 150-300 chars for feed, longer OK for carousels | Essential (photo/reel/carousel) | Behind-the-scenes, tutorials, UGC, reels | |
| Conversational, community, informative | 40-80 chars for engagement, longer for groups | Helpful but not required | News, events, discussions, longer stories | |
| Professional, insightful, authority | 150-300 chars hook, up to 3000 for articles | Optional (increases reach) | Industry insights, achievements, lessons learned | |
| X/Twitter | Sharp, witty, real-time | < 280 chars (shorter = more engagement) | Optional (increases engagement) | Hot takes, threads, real-time commentary |
| Threads | Casual, conversational, authentic | 500 chars max | Optional | Personal takes, community engagement |
The hook must stop the scroll. Proven patterns:
| Technique | Example |
|---|---|
| Contrarian | "Most SEO advice is wrong. Here's what actually works." |
| Number | "3 mistakes killing your conversion rate" |
| Question | "Ever wonder why your best employees quit?" |
| Story | "Last year I lost our biggest client. Here's what I learned." |
| Bold claim | "Your pricing page is losing you 40% of potential customers." |
| Curiosity gap | "The one thing I wish someone told me before starting a startup..." |
| Goal | CTA Style | Example |
|---|
test cases passed, vs 13 / 22 without
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