Clone your writing style: make every AI output sound like you

You use AI for writing -- emails, LinkedIn posts, articles. But the result always sounds the same: smooth, generic, interchangeable. Not wrong, but not like you either. You read the text and think: 'That sounds like an AI.' And your readers think so too.

The problem: Every person has a unique writing style -- sentence length, word choice, rhythm, humor, directness. When you simply let AI write, you get an average of millions of texts. It is grammatically perfect and factually correct -- but it sounds like no one. The voice is missing.

The solution: You create a writing style profile. A document that describes your style so precisely that you can insert it as an instruction into any AI tool -- and from that point on, the output sounds like you instead of generic AI.

Why this works: AI models are extremely good at following style instructions -- when they are specific enough. 'Write casually' does nothing. But 'Short sentences, maximum 12 words. No filler words. Direct address. Humor through understatement, never through puns.' -- that changes the output immediately.

The task (25 minutes, 3 phases):

Phase 1 -- Collect writing samples and get them analyzed (8 min)

Gather 3-5 texts that YOU wrote. Ideal examples are:
- A business email you were happy with
- A LinkedIn post or social media contribution
- A message to colleagues (Slack, Teams)
- A longer text (blog post, newsletter, project description)
- An informal message (WhatsApp to friends counts too)

The more variety, the better. The AI needs examples from different contexts to distinguish your true style from situational adaptations.

Copy this prompt:

'You are a linguist and style analyst. I am giving you several text samples that are all written by me. Analyze my writing style as precisely as possible. Focus on patterns that run through ALL texts -- not isolated cases.

My text samples:

[Text 1 -- Context: business email]
[Paste here]

[Text 2 -- Context: Social media / LinkedIn]
[Paste here]

[Text 3 -- Context: message to colleagues]
[Paste here]

[Text 4 -- Context: (optional, additional text)]
[Paste here]

Analyze these dimensions:

1. Sentence structure: Average sentence length? Short and concise or complex? How often do I use subordinate clauses? Where do I place periods vs. dashes?

2. Word choice: More formal or colloquial? Technical terms or everyday language? Foreign words? Are there favorite words or recurring phrases?

3. Tone and attitude: Directness (do I immediately say what I want, or ease in)? Humor (and what kind)? Level of politeness? Optimistic, realistic, critical?

4. Rhythm: Does sentence length vary strongly or stay even? Is there a recognizable pattern (e.g., short-short-long)?

5. Structure: How do I build paragraphs? Do I use lists, enumerations? Do I start with the most important thing or build up?

6. Distinctive features: What stands out that most people do not do? This is often the most valuable -- the small quirks that make a style unmistakable.

7. What I do NOT do: Which common stylistic devices do I clearly avoid? (e.g., no emojis, no rhetorical questions, no exaggerations)

Summarize the analysis as a concrete style profile -- not as an evaluation but as a description.'

Phase 2 -- Turn the style profile into a system prompt (10 min)

Now convert the analysis into an instruction you can insert into any AI tool from now on.

Copy this prompt:

'Turn the style analysis into a compact, direct writing instruction -- a so-called system prompt I can give to an AI so it writes in my style.

The profile should:
- Be maximum 200 words (shorter is better)
- Contain only concrete instructions, no descriptions or explanations
- Be formulated as imperatives (Do this, avoid that)
- List both dos and donts
- Focus on the patterns with the strongest effect

Format:

WRITING STYLE PROFILE: [First name]

Core attitude: [1 sentence]

Sentence structure:
- [Rule 1]
- [Rule 2]
- ...

Word choice:
- [Rule 1]
- [Rule 2]
- ...

Tone:
- [Rule 1]
- [Rule 2]
- ...

NEVER:
- [Anti-rule 1]
- [Anti-rule 2]
- ...

Signature elements: [2-3 style elements that immediately identify a text as mine]

Also create a short version (50 words) I can quickly insert into any conversation when I do not need the full profile.'

Save the result -- you will use it again and again.

Phase 3 -- Test and refine (7 min)

Now test your style profile with a real use case.

Copy this prompt:

'Here is my writing style profile:

[Insert your profile from Phase 2]

Now write in EXACTLY this style the following texts. Strictly follow the profile:

1. A short email: I need to let a colleague know I cannot attend a meeting next week but am sending a substitute.

2. A LinkedIn post (max 150 words): About an insight I had at work -- the topic is: [choose something from my text samples or use: effective team collaboration].

3. An informal Slack message: I am asking the team if anyone has time for a quick brainstorming session next Wednesday.

After each text: Rate on a scale of 1-10 how close the text is to my style. If below 8: What is missing? Which rule from the profile was not applied?'

Read the generated texts critically. Do they sound like you? If not:
- Identify what is off
- Add the missing rule to your profile
- Test again

This feedback loop is the key: a style profile improves with every correction.

Three examples of what a style profile can look like:

Example 1 -- Direct and concise (tech lead):
Core attitude: To the point, respectful, no detours.
Sentence structure: Maximum 15 words per sentence. One thought per sentence. Paragraphs with maximum 3 sentences.
Word choice: Verbs over nouns. Active over passive. Technical terms only when the audience knows them.
NEVER: Introductions like 'I just wanted to quickly...' or 'As discussed...'. No hedging ('maybe', 'possibly', 'under certain circumstances').
Signature elements: Emails start with the action, end with a concrete next step.

Example 2 -- Warm and vivid (content marketer):
Core attitude: Personal, inviting, slightly narrative.
Sentence structure: Alternates between short sentences and one long, flowing sentence. Deliberately uses dashes.
Word choice: Visual comparisons from everyday life. Occasional English words when they are more precise.
NEVER: Bullet points in social media posts. No jargon without explanation. No calls to action like 'Like if you agree.'
Signature elements: Always starts with a specific scene or observation, never with a thesis.

Example 3 -- Analytical and structured (consultant):
Core attitude: Competent, factual, with dry humor.
Sentence structure: Medium length (12-20 words). Uses enumerations and numbering. Parentheses for asides.
Word choice: Precise technical terms but no buzzwords. Numbers and data instead of vague claims.
NEVER: Exclamation marks. No emotional appeals. No phrases like 'I think that...' (instead: direct statement).
Signature elements: Always a concrete example after every claim. Ends with a clear recommendation for action.

How to use your profile in daily life:

1. Short texts: Insert the 50-word short version before your request
2. Important texts: Use the full profile as a system prompt
3. New AI tools: Save the profile as Custom Instructions (ChatGPT) or as project instructions (Claude)
4. Teamwork: Create style profiles for recurring formats (newsletter, client communications) and share them with the team

Get even more out of it:
- Create separate profiles for different contexts (professional vs. informal)
- Analyze your favorite authors with the same method and learn what exactly you like about their style
- Combine your profile with format requirements: 'Write in my style a newsletter with maximum 300 words and three paragraphs'
- Ask the AI to summarize your style in one sentence -- that shows you how your texts come across to others

Your learning outcome: You learned to consciously analyze your own writing style and convert it into a reusable instruction. This has two effects: first, AI texts now sound like you instead of a faceless machine. Second, you understand your own style better -- which makes you more confident when writing manually too. The key insight: style is not a talent but a pattern. And patterns can be described, reproduced, and deliberately deployed.