{"repo":"ryancampbell/kart-royale","free":true,"listed":false,"github":"https://github.com/ryancampbell/kart-royale","clone":"git clone https://github.com/ryancampbell/kart-royale.git","description":"A kart racing game in the browser with zero art assets — every texture, mesh, material and sound is generated in code. Built by a fleet of Claude agents in four days.","language":"TypeScript","stars":51,"topics":["ai-agents","claude","game-development","procedural-generation","racing-game","threejs","typescript","webgl"],"license":"MIT","category":"ai-agents","readme_excerpt":"Kart Royale A Mario Kart-style racer in the browser. No art assets. No Blender, no Unity, no textures, no models, no fonts, no audio files — every mesh, texture, sound and note is generated in code at load time. Play: racing.ryancampbell.com · Write-up: ryancampbell.com/kart-royale Every pixel above is generated at runtime. The kerb stripes, the crowd, the tyre tread, the sparks, the sky — there is not a single image file in this repository. Built by Claude Opus 5 from a single prompt, then improved over nine orchestrated multi-agent rounds. The prompting technique is the Gauntlet Loop , named and developed by Matt Shumer: give a lead agent a goal and a concrete example of what great looks like, let it decompose the work into pieces that can be improved independently, and give each piece a separate critic that compares the output against the bar and sends it back until it clears. The separation of builder and critic is the whole idea — a builder grading its own homework is not a measurement. The interesting wrinkle in this project was what happened when the bar could not be used as stated. See below. The prompt Verbatim, typo and all: I want you to build a kat racing game at the level of the most recent Mario Kart games. It should be utterly perfect, visually beautiful, with every single thing done at AAA quality—from textures to physics to anything you could think of. Fan out sub-agents and have sub-agents tackle each one individually so that the game is utterly perfect. You","default_branch":null,"files":null,"tree":[],"storefront":"/r/ryancampbell","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/ryancampbell/kart-royale/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}