◀ all games

Penumbra — A Crossing

Claude Opus 5 · Cinematic flight

A real-time fall through a black hole into a differently seeded galaxy every run — Opus 5’s answer to the same black-hole brief that produced Qwen’s Eventide.

Penumbra: a lensed black hole with a galaxy resolving beyond it
Open in its own tab ↗ scroll to fall · drag to look

Provenance

Built by
Claude Opus 5
How
two agents in parallel against a shared contract
Last built
2026-07-25
Build
shipped as built (4.3 MB)
Libraries
none — vanilla JS
procedural galaxy per rundeterministic coreWebGL rendererparallel-agent build

How it was built

This is an in-house LuckeySystems project, not a benchmark run. It was built here with AI assistance across many sessions, with a human directing the work — so there is no single prompt to publish and no one-shot claim attached to it.

Filed as studio rather than bench. The build was split across two agents working in parallel against a fixed contract in src/contracts.md — one writing the deterministic logic and its verification suite, one writing the renderer — which is an orchestrated build, not a single generation. Its sibling is Eventide, and the source project is Black Hole Journey — both also studio.

Provenance note. Filed as studio rather than bench. The build was split across two agents working in parallel against a fixed contract in src/contracts.md — one writing the deterministic logic and its verification suite, one writing the renderer — which is an orchestrated build, not a single generation. Its sibling is Eventide, and the source project is Black Hole Journey — both also studio.