Stigmery: a browser-based ABM playground (hobby project, would value your impressions)

Hi everyone,

After my thesis I kept tinkering with ABM as a hobby, and over the past months I’ve put together a small browser-based tool called Stigmery. I’m sharing it here because this is the right community to weigh in on whether it’s any good.

Stigmery (https://stigmery.com) runs entirely in the browser, is free, and needs no account. It has eight built-in models that will be familiar to anyone here: Ant Foraging, Wolves & Sheep, Schelling, Game of Life, Forest Fire, Reynolds Flocking, Virus on a Network, and Resnick’s Termites. The DSL is small and JSON-defined; rules are written in a JavaScript-like expression language.

I like NetLogo for what it is, but going from an idea to a running model often takes more setup than the idea is worth. Stigmery embeds an LLM copilot that can draft or tweak rules from a plain-language description, so you can sketch, run, and revise in a few minutes. Models are saved as plain JSON with a fixed seed, so you can rerun them later without the AI in the loop.

No monetisation planned. I’d be glad to hear what works, what doesn’t, and whether you can see it being useful for teaching or quick exploration. Happy to answer questions in this thread.

Best,
Marvin