Developer builds custom OS 'Greia' for his daughters using Claude
orblabs · reddit · 2026-08-26
A programmer with 20 years of experience used Claude (specifically Opus 4.6) to build a custom Linux operating system called Greia for his young daughters during his free time.
Context & Motivation
The author initially tried running antiX Linux on an old netbook with simple games, but standard desktop environments were too complex and prone to accidental mishaps for toddlers. With the help of modern LLMs, especially Claude, he realized that building a full custom system was feasible for a single person.
Key Features
- Kid-Only UI: The system boots directly into an "Activity" world, hiding the desktop, taskbar, file system, and terminal. Even his 2.75-year-old can use it independently.
- Agent Dev Skills: Greia integrates specific skills for coding agents, teaching them the platform's UI norms, performance limits, and localization needs, rather than generating generic code.
- Dynamic Content: For example, after watching Free Willy, the girls woke up to an auto-generated "Orca Playground" app with interactive features and educational facts.
The project splits into a child-facing side and a parent app (for managing activities), demonstrating the potential of LLMs in personalized software engineering.
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