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VoxelCraft

by Claude Opus 5 · xhigh reasoning · Voxel sandbox

A library-free WebGL voxel sandbox with survival and creative modes, chunked biomes, crafting, hunger, a seed picker and browser saves — all in one self-contained HTML file.

VoxelCraft title screen: Play Survival, Play Creative, Load Saved World and a world-seed field
Open in its own tab ↗ starts from its own menu — this game grabs your mouse in-world; press Esc to free it

Provenance

Model
Claude Opus 5
Reasoning
xhigh
Made with
Claude Code CLI · Athena-spawned agent
Generated
2026-07-24
Build
single HTML file · 206 KB · 5,188 lines
Libraries
none — raw WebGL
xhigh reasoningsurvival + creativecrafting + hungerchunked biomesseed picker + savesno libraries

The prompt

Original prompt (recovered, verbatim)

Create a Minecraft-inspired browser game in the Minecraft folder. Use similar-looking voxel textures and gameplay while avoiding copied proprietary assets; I actually like Minecraft, so make it feel faithful. The output must be a single self-contained HTML file that plays directly in a browser.

Recovery status

Verbatim standardized Minecraft brief, handed to a Claude Code agent (`claude-opus-5`) that Athena spawned into `luckey-bench-runs/opus-5/minecraft` on 2026-07-24. The parent session instruction was to find the Minecraft game prompt, create a `minecraft` folder, and spawn another Claude agent with only that prompt. Session continuations after the Athena handoff were resume-from-interruption messages (`Continue from where you left off.` / `continue`), not design follow-ups. Session records show `effort: xhigh`.

Provenance note. Same standardized Minecraft brief as the head-to-head collection. Athena spawned a dedicated Claude Code agent into luckey-bench-runs/opus-5/minecraft with only that prompt. Session records show effort: xhigh.