How to Train Claude on Your Brand Voice (Step by Step)

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Let me be honest: using AI for writing felt like cheating to me at first. I’ve always enjoyed writing. It’s one of the parts of this work that’s mine. Handing it to a machine felt like giving that away.

But I also knew something else. My ideal client… the woman who wants to get found online but can’t sustain posting every single day… her biggest barrier isn’t strategy. It’s the blank page. If AI could remove that barrier and make it possible for her to publish consistently, that changes everything. Consistently published, well-structured content is exactly what AI search tools are looking for. I couldn’t teach a content system and ignore the tool that makes it doable.

What shifted how I felt wasn’t a tutorial. It was realizing I’d spent four years as a Creative Project Manager giving direction to a creative team. I didn’t rewrite every designer’s work from scratch. I taught them my standards, gave clear direction, and let them execute. The output got better every time because they learned how I thought.

This is the same thing. A Brand Voice Playbook teaches Claude how you think. Without one, it writes in default mode, the same way it writes for everyone who hasn’t told it anything different.

Psst — the Brand Voice Prompt Pack is free and takes about 35 minutes. Grab it before you keep reading if you want to build yours while this is fresh.

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Why does AI-generated content all sound the same?

You’ve seen it. Probably written it without realizing. The tell-tale signs are everywhere once you know what to look for:

• The em dash used as a dramatic pause (every single time)
• “Genuinely” (as if saying it makes the thing more genuine)
• “Unlock,” “leverage,” “empower,” “navigate the landscape”
• Three short punchy sentences. In a row. For effect.
• A closing paragraph that summarizes everything you just read
• Comprehensive, thorough, and completely impersonal
• “It’s worth noting…” (it’s never worth noting)
• The same cadence, the same rhythm, paragraph after paragraph, no matter the topic

It even has a name now: AI slop. It’s recognizable because Claude writes the way it’s been trained to write… which is the same way it writes for everyone who hasn’t told it anything different. Without context, it defaults. It picks the most statistically likely phrasing, and that turns out to be the same phrases, the same rhythm, the same structure, every time.

Here’s the thing though. When someone says “all AI sounds the same, so I don’t use it” (like that’s a flex), what they’re telling me is that they’ve never learned to train it correctly. The problem isn’t AI. The problem is using AI without giving it anything to work with and expecting it to know who you are. (I would never actually say this to someone’s face. But if you’re here reading this, it’s because you’re curious enough to learn how to do it right.)

Your warmth, your unique perspective on a topic, your specific way of landing a point… none of that survives unless you give Claude something to work from.

That’s not a flaw in Claude. It’s just what happens when you don’t give it anything to work with, and it’s fixable.

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What is a Brand Voice Playbook?

A Brand Voice Playbook is a document that tells Claude everything it needs to write in your voice instead of its own. Think of it like an onboarding guide for a new team member… except this one has infinite patience and never forgets what you told them (as long as you paste it in at the start of the conversation).

It covers:

• Your tone and personality (with specific behavioural definitions, not vague words like “authentic”)
• Your sentence structure patterns
• Vocabulary you actually use and words you’d never say
• What sounds wrong in your voice
• Real examples of your own writing, annotated for what makes them work

The difference between this and just telling Claude to “be more casual” is specificity. “Be warm but direct” means nothing to Claude. “Use parenthetical asides for humour. Never use em dashes. Don’t summarize at the end. Close with a question instead.” That it can work with.

And don’t worry. You don’t need to identify any of this on your own. That’s the whole point. We’re going to use Claude to extract it directly from your writing, so you’re not starting from a blank page trying to describe your own voice. (Describing your own voice is hard. Answering questions about a real client conversation isn’t.)

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What does the difference look like?

Same brief, same Claude, two completely different results. Here’s my own About page: what AI wrote without any context, versus what lives on heylindsayrae.com/about.

Without a Brand Voice Playbook:

With over a decade of experience in marketing, I’m Lindsay — a marketing strategist who is genuinely passionate about helping women-owned businesses thrive in the digital landscape. I know firsthand how overwhelming it can feel to navigate the ever-changing world of online marketing, which is why I’ve developed a proven system that empowers women entrepreneurs to unlock their online visibility — without the burnout of posting on social media every day.

“Genuinely.” “Empower.” “Unlock.” “Navigate.” “Landscape.” Em dash. That paragraph could have been written for anyone. Because it was.

With a Brand Voice Playbook (the real version, live on my site):

I’ve been in marketing for over 10 years. I’ve worked in agencies, gone freelance, built a consulting practice, and spent a lot of time helping other people get found while quietly wondering why the same strategies felt so hard to sustain.

The problem wasn’t the tactics. It was the model. The “post every day, be everywhere, perform constantly” model isn’t built for a one-person business. It’s built for brands with content teams and advertising budgets.

So I went looking for a different way.

What I found: Pinterest has a 3-year content lifespan. AI search engines are pulling answers from blog posts and indexed content, not Instagram feeds. And the solopreneurs who get found consistently aren’t the loudest ones. They’re the ones who built content designed to answer real questions. That’s the system I built for myself, and it’s what I help with.

Same information, no borrowed cadence, no banned words. One sounds like a press release. The other sounds like a person.

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How do you build a Brand Voice Playbook to train AI models to write like you?

Here’s where most people expect a complicated process. It isn’t. Total time: about 35 minutes, free Claude account, no plugins.

Before you start: grab one writing sample. An email to a client, a caption, a DM, even a text message. The rawer the better. Don’t overthink it. That unpolished thing you dashed off at 9pm is exactly what Claude needs to find your voice.

Step 1: Download the Brand Voice Prompt Pack
Head to the Resource Vault and grab the free Brand Voice Prompt Pack. It’s a PDF with one prompt inside. That’s the only tool you need.

Step 2: Open Claude and start a new conversation
Go to claude.ai and open a fresh conversation. Free account works fine. You don’t need any special settings or plugins.

Step 3: Copy the full prompt from page 2 of the PDF and paste it in
Copy everything (the whole block, from the first line to the last). Paste it into Claude and hit send.

Step 4: Answer Claude’s questions like you’re talking to a friend
Claude will ask you seven questions, one at a time. It’ll ask about a real client you helped, things people in your industry say that make you cringe, why you actually do this work. When it asks for a writing sample, paste in the one you grabbed before you started. Answer honestly. No polish required. The more specific and real your answers, the sharper your playbook.

Step 5: Save your Brand Voice Playbook
When Claude finishes the interview, it outputs your full Brand Voice Playbook. Copy the whole thing and save it somewhere obvious: a Notion page, a Google Doc, a plain text file. Name it something you’ll actually search for. This is the document you’ll use every time you write with AI from here on.

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How do you use it once you have it?

Once it’s saved, every time you write with Claude:

1. Open a new conversation
2. Paste your full playbook in
3. Say: “Use this as my voice guide for everything we write today.”
4. Write.

That’s the whole process. The magic isn’t the tool. It’s the input.

The other thing worth knowing: the playbook gets sharper every time you use it. Every time you edit a Claude draft and think “I’d never say it that way”… that’s a new entry. Add it to the playbook. After a few sessions, you’ll barely need to edit at all.

It’s exactly like training a creative. The first brief takes the most work. By brief five, they know how you think.

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FAQ

Do I need a paid Claude account to use this?
No. The Brand Voice Prompt Pack works with a free Claude account at claude.ai. No plugins, no subscriptions, nothing to install.

How often should I update my Brand Voice Playbook?
Update it whenever you edit an AI draft and think “I’d never say it that way.” Most people batch updates every few sessions rather than in real time. It doesn’t need to be perfect before it’s useful. It just needs to exist and get updated.

What if I’m not a confident writer? Will Claude still be able to find my voice?
The interview questions are specifically designed for people who don’t think of themselves as writers. You answer like you’re talking to a friend. No polish required. The more honest and specific you are, the better your playbook.

Can I use my Brand Voice Playbook with other AI tools, not just Claude?
Yes. It’s just a document. Paste it into ChatGPT, Gemini, or any other tool the same way. The core document works across platforms.

What’s the difference between this and just giving Claude a style prompt?
A style prompt is a suggestion. A Brand Voice Playbook is a reference document built from your actual writing: real examples, real corrections, specific patterns. One is a note. The other is a manual.

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Your voice is the thing AI can’t replicate on its own. But it can learn it, if you write it down first. The Brand Voice Prompt Pack in the Resource Vault walks you through the whole build in one Claude conversation. Under 35 minutes. Free account works fine.

Grab it here.