opus 5 5 overnight builds
A free generative demo — play it in your browser, no install. Four overnight builds by Claude Opus 5.5 in Claude Code: a freeride game, a voxel diorama, a city through five decades, a pirate ship. Every prompt included.
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Open the live demo Source on GitHubFrom the README
Each build got one detailed brief and a time budget. Claude Opus 5.5 then worked alone in Claude Code: planning, writing code, taking its own screenshots, fixing what it saw. Nobody answered questions, nobody touched the code. All four stopped on their own before the budget ran out.
Each folder is the build exactly as the model shipped it (static, runs offline).
briefs/-prompt-as-sent.md is the full prompt each run received, word for word, including the workbench note appended at the end. briefs/-model-readme.md is the README the model wrote about its own build.
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