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Build Your Personal Digital Twin

Shehara Mar 31, 2026 5 min read

A digital twin is a virtual model that mirrors something real — a factory, a city, a patient, a supply chain. Organisations use them to simulate outcomes, test decisions, and predict failures before they happen in the physical world.

You can build one for yourself. A personal digital twin is an AI that knows your thinking, your expertise, your communication style, and your values — one you can query, test ideas against, and grow over time. This experiment shows you how, using two free tools and no technical skills.

What You Will Build

By the end of this experiment, you will have a knowledge base that captures who you are — how you think, what you know, how you communicate — and a way to query it like a research assistant. You can use it to pressure-test decisions, draft in your voice, explore how you might approach a new problem, or simply see yourself more clearly.

1

Claude.ai

Use Claude to extract and articulate who you are — your expertise, values, communication style, and how you think. Claude turns your answers into a structured personal profile document.

Open Claude.ai
2

Google NotebookLM

Upload your profile and other personal sources. NotebookLM becomes a knowledge base that reasons entirely from your content — an AI that actually knows your context.

Open NotebookLM

Before You Start: A Note on Privacy

  • Claude.ai — By default, conversations may be used to improve Claude’s models. To prevent this, go to Settings → Privacy and turn off “Help improve Claude.” Incognito mode chats are never used for training, even if the setting is on.
  • NotebookLM — Google does not use your uploaded sources, queries, or responses to train AI models. Your notebooks are private by default. No setting changes required.
  • General advice — Avoid financial details, passwords, or anything sensitive. For this experiment, focus on professional expertise, thinking style, and values. These are safe and useful categories.

How to Build Your Digital Twin

1
Extract your profile with Claude

Go to Claude.ai and start a new conversation. Use the prompt below. Answer as fully and honestly as you can — the richer your answers, the more useful your twin will be.

Interview Prompt 
I want to build a personal digital twin — an AI knowledge base that captures how I think, what I know, and how I communicate. Please interview me to build my profile. Ask me one question at a time across these areas: my professional background and expertise, the problems I most enjoy solving, how I make decisions and what values guide them, my communication style and how I prefer to explain things, what I am currently working on or learning, and how I want my digital twin to be useful to me. After the interview, write up a structured profile document I can save and use as a knowledge base. Format it clearly with headings.
2
Save your profile document

Copy the full document Claude produces and save it as a text or PDF file. This is the core of your twin. Other useful documents to add: your CV, writing samples, key project notes, or anything that reflects how you think and work.

3
Create a notebook in NotebookLM

Go to notebooklm.google.com and sign in with your Google account. Click New Notebook and give it a name — “My Digital Twin” works well.

4
Upload your sources

Click Add Source and upload your profile document plus any other files you gathered. NotebookLM will process them and build your knowledge base — usually under a minute.

5
Start talking to your twin

Use the chat panel to ask questions. Every response is grounded in your uploaded content, with citations showing exactly where each answer came from. Try these:

“How would I approach a problem I have never seen before?”
“What are my core professional values based on what I have written?”
“Draft a short bio for me in my own voice.”
“What gaps do you notice in my expertise?”
6
Keep adding to it

Every time you finish a project, write something, or develop a new point of view, add it. Click Add Source in your notebook at any time. Think of it as a living record of how your thinking evolves.

What Makes a Good Digital Twin

  • Formal, polished documents alone give you a formal, polished version of yourself.
  • Mix in rough notes, half-formed ideas, and things you are still figuring out — that is where the most interesting insights tend to come from.
  • The quality of your twin depends entirely on the quality of what you put in.

What This Connects to in the Real World

Rolls-Royce

Digital twins of jet engines predict maintenance needs before anything breaks.

Hospitals

Patient digital twins test treatments before applying them to real people.

Singapore

A city-scale digital twin simulates traffic and infrastructure before changes are made.

The underlying principle is the same at every scale: build a model, feed it real data, and use it to make better decisions. Your personal twin works the same way. The data is just you.

Further Reading

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