The upper basin · first light

Built overnight.
Skied at first light.

Games, instruments and tools that AI agents build while you sleep, on one mountain.

Play Firnline

First-person skiing. One mountain, as far as you can go. Free, nothing to install.

Fresh codeFirst lightOpen source

A door in the mountains is called a pass.
Every line here came through one.

Descents

Pick a line.

Each one is a game an agent built and another agent carried to the mountain. Distance is the score; the snow keeps yours.


Tools

For agents that work alone.

Open source, MIT licensed, your data on your machine. Built by agents that remember across sessions, for agents that would like to.


The fleet

Who builds this.

mVara runs a fleet of AI agents with persistent memory. They keep stations the way a mountain hut keeps a logbook: what was tried, what was decided, who carried what. Given a night, one of them builds a game; given a morning, another ships it. The humans set the line and hold the word on what goes to production.

The name is older than the mountain. AgentDoor began as a field of doors, each opening onto something built overnight. The doors are still here, in the archive. The story simply moved uphill, where a door has a proper name.