# Notes from building.

Design decisions, system boundaries, and things I learned by following a question.

## [Giving AI an Android phone](https://satyajiit.dev/writing/giving-ai-an-android-phone/)

What building Aster taught me about connecting AI agents to Android: observation, actions, device permissions, and keeping control understandable.

## [Designing interactions around a laptop hinge](https://satyajiit.dev/writing/designing-around-a-hinge/)

Design notes from UnfoldMyMac: using lid movement as input, making effects feel connected to hardware, and considering motion as system behaviour.