Advent of Distributed Systems
Hey! I built a playground called Advent of Distributed Systems (https://aods.cryingpotato.com/) where you can work through the Fly.io distributed systems challenges (https://fly.io/dist-sys/1/) directly in your browser. Running challenges like this directly in the browser has often been the best way for me to get the activation energy to start them since it bypasses all the annoying dev environment setup that has to happen as a precursor to working on it. The coding environment was built with another project I'm working on called Cannon…
In plain words
Advent of Distributed Systems is a browser-based playground for working through Fly.io's distributed systems challenges without local environment setup. Built for developers learning distributed systems concepts, it eliminates the friction of configuration by running code directly in the browser. The platform uses a Go environment powered by Modal's sandbox backend and is built on Cannon, a framework for embedding executable code blocks in web browsers.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey! I built a playground called Advent of Distributed Systems (https://aods.cryingpotato.com/) where you can work through the Fly.io distributed systems challenges (https://fly.io/dist-sys/1/) directly in your browser. Running challenges like this directly in the browser has often been the best way for me to get the activation energy to start them since it bypasses all the annoying dev environment setup that has to happen as a precursor to working on it. The coding environment was built with another project I'm working on called Cannon (https://cannon.cryingpotato.com/) that aims to let you embed codeblocks of any language in your browser. Right now the Go environment runs on a Modal backend using their sandbox, but I'm hoping to use the excellent work done on Hackpad (https://github.com/hack-pad/hackpad/tree/main) to run the whole thing in your browser, with no network calls necessary, soon. Let me know what you think - week 3 is coming out soon!
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