sam santos

Lucas

Designing an AI agent that lives in your messages

AIFounding designer2025 to 2026Shipped
Lucas product design board
Lucas product design board
Lucas product design board
Lucas product design board
Lucas product design board
Lucas product design board

fig. 01 - 07 · drag

A fully alive AI that lives in your text messages and finishes real work on its own.

Lucas is a proactive AI agent that lives primarily in your text messages. It doesn't wait to be asked. It commits to and completes complex, multi-step tasks for you, all through plain conversation. I designed all of it, top to bottom: the brand and website, the end-to-end product flows and the design system behind them, onboarding, and the conversational UX patterns that make the agent feel legible inside a chat thread. It was grounded in the discovery, user research, and usability testing I ran to pressure-test every interaction and hierarchy decision. One detail I love is the lock-screen flow, which previews what Lucas is working on and lets you act on it without ever unlocking.

12k early sign-upsAct without unlockWeb · shipped

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there's light under this page.this looks better on desktopmade by hand in london · © 2026