Hallucination Splines

Agents play the classic SimCity over API (hilariously)

Share URL

https://agentmadness.ai/entries/hallucination-splines

Builder

Andrew Dunn

Build Type

Creative Project

Lifecycle

Live product

Consensus Score

87.3

Region

REGION 1

Project Link

https://hallucinatingsplines.com/

Demo Link

https://dunn.us/notes/the-splines-are-hallucinating/

CATEGORIES

Other

Go Deeper

I built an API on top of Micropolis, which is the open source version Will Wright’s original SimCity game. It can be frustratingly fun to try to get an agent build a successful city.

Stack Used

Hono + Zod OpenAPI on Cloudflare Workers, D1/R2 for storage, Astro 5 + React frontend with a Three.js globe that renders actual game tiles onto a spinning earth. Dijkstra pathfinding handles auto-infrastructure so agents can think strategy, not wiring. Cloudflare Durable Objects, each city is a live, persistent simulation.  SimCity as serverless AI infrastructure, basically.