Economist by training · Builder by practice
Games, research tools, and AI-native products that turn complicated systems into something you can see, test, and use.
Explore the workPrimary focusFollow a point to the project
Current focus
Marque & Reprisal and Twenty-Four Histories are the work I care most about right now. The rest are selected products, games, models, and research.
The age of sail, wrapped around the whole world.
A globe-spanning pixel-art sailing roguelike set in 1522. Explore, trade, fish, fight, colonize, and survive on a spherical world built from a geodesic tile system.
Two thousand years of Chinese history, made searchable.
A reading environment for the official dynastic histories of China, pairing source text with literal and idiomatic English translations, annotations, and full-corpus search.
Task tracking that listens before it asks.
An AI-native task tracker for teams. Thane listens to ordinary Slack conversation, infers task state, keeps an auditable history, and follows up when work goes quiet.
Sixteen words. Eight overlapping connections.
A 4×4 semantic word puzzle where every swap matters. Arrange the grid so each row and column forms a valid set, with a generator and curation system behind the daily game.
See scarcity move wealth between generations.
An interactive overlapping-generations model for testing how constrained housing supply can affect prices, ownership, inequality, and intergenerational wealth transfers.
A nine-vertex graph that breaks a 1997 conjecture.
A hand-checkable counterexample to the Hilton–Zhao vertex-splitting conjecture, accompanied by a complete paper and two independent exhaustive verification paths.
About
I’m Garrett Petersen, a Ph.D. economist and independent software builder. My work tends to start with a question—about incentives, language, coordination, history, or play—and end as a working tool.
That has led me from economic simulations and mathematical verification to word games, historical archives, team software, and a globe-spanning sailing roguelike.
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