Digital twin for coaches: support between sessions, with clear limits

It is a version of the coach or mentor made with artificial intelligence: it has their face and their voice, and a brain of its own holding their method, the questions they use, the exercises they set and their rules about what a conversation covers and what it does not. Its job is to handle the part of coaching that repeats itself, always saying that it is an AI.

The short definition of Digital Twin by Legathum is this: a professional cloned with AI who serves clients and sells at any hour. In coaching, that does not mean the twin runs your sessions. It means that questions about how you work, a reminder of an exercise or an explanation of a tool from your method can be there when the client needs them, without taking up your diary.

The part that does not depend on reading the person in the moment. A coaching session is worth what its listening is worth, along with the right question and the well-timed silence; that stays with you. What surrounds the session is a different matter.

Outside coaching, and it is worth writing down. Coaching supports development, career or business goals; it does not assess or treat anyone's health. When something from that territory comes up in a conversation, the right response from a coach, and from their twin, is not to go into it and to recommend a health professional.

The GDPR backs this up from the data side. Article 9 treats data concerning health as a special category with stronger protection, and Article 5 asks you to process only the data needed for the purpose. For a coaching twin, the practical consequence is clear: do not ask about health, do not keep it if someone mentions it, and do not use it for anything.

Two things. The first applies to every client: they must know they are talking to an AI, at the latest at the first interaction, as Article 50 requires. In Digital Twin by Legathum, the twin says so in its first turn and its name in the meeting ends in "Clon IA".

The second matters if you coach a company's staff. Since 2 February 2025, Article 5(1)(f) has prohibited using AI systems to infer a person's emotions in the workplace, except for medical or safety reasons. A twin supporting a client's managers must not try to work out how they feel from their voice or face, or report on it to anyone.

You can describe your method, your experience and how you work. You cannot promise results that do not depend on you. In Spain, the Unfair Competition Act treats as misleading any information that can mislead people about the results they can expect from a service, and whatever your twin tells a prospective client is your business speaking.

Write it as a rule in your Book of Criteria: if someone asks whether your coaching will get them a promotion, a pay rise or another specific change, the twin explains how the process works and what depends on each side, without giving timescales or promising the outcome.

With your method written down and with your questions. Start with how you explain your approach in the first conversation, the stages of a programme, the tools you use and the exercises you set between sessions, each with its purpose and how it is done.

Then add your boundary rules to the Book of Criteria, each with its condition, its action, its reason and its source: which topics it always refers to a session with you, what it does if something health-related comes up, how it answers when asked to promise a result. A good coaching Book of Criteria usually has more rules about what is not done than about what is.

Nothing that has not been checked is presented as available. This table separates the two for a coach.

Today consultancy is the profession the method and session types are designed for. A coach who works with companies is close to that profile.

• Today: a twin with your face and your voice, a Master Brain with a Book of Criteria, the AI notice and the "Clon IA" name, verified and revocable consent, and a booking page.
• In development: coaching-specific workflows, with support between sessions, exercises and progress reviews for each client.
• In development: the twin applying your rules in the conversation and citing the rule behind each answer.