# mantasvaitukaitis.com

> Portfolio, working notes, practical guides, and technical references by Mantas Vaitukaitis.

## About
- [About](https://mantasvaitukaitis.com/about.md): Working across product design, systems, and software.

## Work
- [Projects](https://mantasvaitukaitis.com/projects): Selected personal and client work.
- [rawstax](https://mantasvaitukaitis.com/projects/rawstax.md): Agent-native design system. — 2026 / type: Web / status: in-progress / role: Systems design / technologies: OpenAI, Anthropic, Python, HTML, CSS, JSON / live: https://rawstax.com — outcome: Invent a colour or restyle a button and the build fails. The rules are tests the agent has to pass. Every mistake I find becomes another test, so it stays fixed.
- [formos](https://mantasvaitukaitis.com/projects/formos.md): A parametric massing tool for early tower studies. — 2026 / type: Web / status: in-progress / role: Design engineering / technologies: JavaScript, OpenAI, Anthropic, Vite — outcome: A study is a URL. Send one and the tower opens with no interface around it, turning, and whoever gets it can still orbit it. The same model exports as IFC for whatever comes next.
- [tesswork](https://mantasvaitukaitis.com/projects/tesswork.md): A one-bit icon library built from Lucide. — 2026 / type: Web / status: shipped / role: Design engineering / technologies: React, TypeScript, Vercel, OpenAI, Anthropic, Vite / live: https://tesswork.com — outcome: Each icon is a small JSON file that draws itself at any size or colour. An agent can fetch one and change how it looks or moves.
- [qverse](https://mantasvaitukaitis.com/projects/qverse.md): The cabin and the lounge, walkable before you book. — 2021-2024 / type: Web/VR / status: delivered / client: Qatar Airways / agency: Neutral Digital / role: Design / live: https://www.qatarairways.com/html/redirect/QR/qverse/ — outcome: A 1,860% return on ad spend in its first year, and 55% of the customers it brought in had never booked with the airline before. It won the Future Travel Experience VR award.

## Docs
- [Docs](https://mantasvaitukaitis.com/docs): Notes, guides, tools, and machine-readable references.
- [A design system for agents has to say no](https://mantasvaitukaitis.com/docs/notes/design-system-for-agents.md): A field report on making a design system enforceable by agents. Component contracts pair portable meaning with per-platform bindings, instance grammar defines the DOM each component requires, and a validator rejects markup that carries approved class names on the wrong structure. — author: Mantas Vaitukaitis / topics: design systems, agents, engineering, design / published: 2026-07-28 / updated: 2026-08-25

## Machine interfaces
- [Machine](https://mantasvaitukaitis.com/machine): Human-readable guide to the site machine layer.
- [Design](https://mantasvaitukaitis.com/design.md): Markdown design-language reference.
- [Sitemap](https://mantasvaitukaitis.com/sitemap.xml): Canonical public URL inventory.

## Contact
- [Contact](https://mantasvaitukaitis.com/contact): Start a project conversation.
- Email: m.vaitukaitis@gmail.com
- GitHub: https://github.com/mantas-v
- LinkedIn: https://linkedin.com/in/mantasvaitukaitis