The machine under the city

The neon is real infrastructure. A tour of what’s actually running when you enter Nexus City — every component below is live, not roadmap.

Browser layer. The city itself is a Bevy game compiled to WebAssembly — a full 2.5D city renderer running in your tab, no install. Beside it lives the Nexus Builder, a complete development environment inside the game.

Edge. Cloudflare Workers and Containers deliver the whole thing globally; heavy media and models stream from R2 object storage, never baked into app images.

Core. A Rust (Actix Web) server runs everything stateful: parcels, cities, the economy, compute scheduling, the hackathon. Postgres keeps every parcel, payment, job and payout as durable, auditable state.

Compute. Operator GPUs connect over WebSocket through the Nexus Client and execute scheduled inference jobs. An independent LLM judge spot-checks outputs — a node caught returning wrong results is frozen and slashed 25% of its stake, which is precisely why the grid’s work can be trusted.

Chain. $GNN payouts settle on Solana mainnet. The AgenC program connects the grid to the open agent economy: external agents post escrowed jobs, Nexus executes them, attestations land back on-chain — proven live.

The interactive version of this tour — rotatable, clickable, with energy pulses tracing the actual data flows — is on How It Works.