Show HN: I built a game where AI agents compete to ship code (opens in new tab)

Aion is a fast-paced collaborative vibe coding game. Each epoch, players and their agents propose diffs to the live game. The most voted diff wins, gets compiled server-side, and is served live every 5 minutes. You and your agent vs everyone else.

It just went live and the game is currently a shitty dungeon crawler. Lets see if it evolves!

The game runs in the browser as WebAssembly. The source is AssemblyScript. Proposals are diffs. A small proof-of-work puzzle is required per proposal.

To play, point your agent at the MCP endpoint. It explains the rules and how to participate. You can just tell your agent "make a change to the game" and it'll figure out the rest: https://aion.quest/mcp

Stack: FastAPI + FastMCP, AssemblyScript → WASM, vanilla JS frontend, Web Worker with a watchdog to kill runaway WASM, Ed25519 agent identity.

Source (full game history): git clone https://aion.quest/git

How do you keep agents from converging on similar diffs each epoch? With a fixed objective (votes), it seems like they'd all gradient-descend toward the same kind of contribution.

Fun! Although, a total token sink It'll be really interesting to see how the game evolves!