Last week I spoke to a packed room in Copenhagen at another Claude Meetup, this time focused on Marketing & Communications. I opened with a frustration: I'm tired of hearing "the same voice" on LinkedIn.
It's obvious that most people on LinkedIn use an out-of-the-box AI as their ghostwriter — and copy/paste the output straight into a post. The result: flat, generic posts with no soul, "not this but that" constructions, em-dashes and emojis everywhere. AAARGH.
> 📥 The full guide is available as an 8-page PDF (in Danish). Download it at the top of the page — with the full prompt, two templates and LinkedIn's 2026 rules.
The premise
You and your voice are just a text file. Give me a few minutes and I'll prove it. And when I'm done, you'll want to be one.
People laughed. Then we built it live. On a free Claude.ai plan. In front of them.
Why it's worth an hour right now
On May 20, 2026 LinkedIn made it official: posts that "appear AI-generated and lack a clear perspective" get reduced reach. From Laura Lorenzetti, LinkedIn's VP of Global Editorial:
> It's ok to use AI to help you write, but your posts and comments need to represent your voice and your perspectives. The ultimate value comes from the human behind the tool.
AI help is explicitly fine. What gets punished is the polished and generic — the kind of thing anyone could have written. The question isn't whether you can use AI; it's whether it still sounds like you.
A voice skill is one text file
Inside it are the rules for how you write. How you open. How you close. Your rhythm. The words you repeat. And just as important: the phrases you would never write.
You build it once. After that Claude pulls it up every time you ask for a LinkedIn post and writes in your voice from the first sentence. The file is yours. You can take the same rules to ChatGPT or Gemini.
Build. Prove. Tune.
- Build. A voice skill distilled from three things: your own past posts, a short brand voice file, and LinkedIn's 2026 rules.
- Prove. Run the same prompt twice — once without your skill, once with. One version could be anyone. The other could only be you.
- Tune. A voice file is a living document. Once a month, feed Claude your latest strong posts and check whether the algorithm has shifted.
The most important rule: never copy-paste
1. Your idea. A human with intent and an angle.
2. Claude drafts. Your voice skill turns the idea into a draft that already sounds like you.
3. Make it yours. Read it. Edit it. Add your perspective. This step is non-negotiable.
If you copy-paste the draft directly, you've built a machine that sounds like you without being you. That's exactly what LinkedIn punishes. And exactly what your readers can feel.
Before August 2: AI labelling and accountability
From August 2, 2026 the transparency obligations in AI Act, Article 50 apply. For text, labelling isn't required if there has been real human review and you stand behind it. The line isn't "did AI touch this?" — the line is "did you read it and take responsibility for it?"
Where you start tonight
Open claude.ai. Find eight of your own posts. Paste in the prompt from the PDF. Build your file. It takes less than an hour. When you're done, you have something most people on LinkedIn don't: a tool that writes like you, and only you.
Bottom line: You're just a text file. And maybe you just learned something most people don't know exists.
🎓 Want hands-on training? Book our Claude Cowork Workshop or a tailored session on AI for marketing & communications.
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Stefano Vincenti · AI Advisor & External Lecturer, IT University of Copenhagen & DIS · Cofounder & CTO BotTellMe · Partner, TryZone · aitrainer.dk