# FullDigital

> Nonprofit association helping people build their own AI operating system — a second brain they truly own, not rent.

FullDigital is a Latvia-registered nonprofit (Reg. no. 40008303188, Ikšķile) that teaches the foundations of personal AI openly and for free. The site explains the AIOS (AI Operating System) model — five layers people build to own their AI — and runs a selective, free cohort that meets live to build together.

## Pages

- [Home](/): What FullDigital is and why owning your AI matters.
- [AIOS overview](/aios): The five-layer model of an AI operating system you own.
- [Constitution layer](/aios/constitution): The file your AI reads first.
- [Memory layer](/aios/memory): Where your AI keeps what it knows about you.
- [Skills layer](/aios/skills): Reusable capabilities your AI can run.
- [Tools layer](/aios/tools): How your AI reaches other systems (MCP, connectors).
- [Focus layer](/aios/focus): How your AI decides what to do next.
- [Blog](/blog): Essays on owning your AI, second-brain systems, and the feedback loop.
- [What is an AI agent?](/what-is-an-ai-agent): A model handed tools and a task, the loop it runs, and how much autonomy to give it.
- [What is an LLM?](/what-is-an-llm): Tokens, training, context windows, and why the model is not the product.
- [What is a prompt?](/what-is-a-prompt): Everything the model can see when it answers, with good and bad prompts side by side.
- [Resources](/resources): Free starter kit and guides.
- [Starter kit](/starter-kit): Hands-on starting point for building your AIOS.
- [Responsible AI](/responsible-ai): Our take on responsible, owned AI.
- [About](/about): The association, its founder, and its purpose.
- [Contact](/contact): How to reach us.
- [Waiting list](/waiting-list): Apply for the next selective cohort.
- [Quiz](/quiz): Find out where you are on the AIOS path.

## Optional

- [Privacy policy](/privacy)
- [Cookie policy](/cookies)