workerd

workerd is the genuine article — it's the production runtime powering Cloudflare Workers, now open-sourced. Real engineering: V8 integration, Cap'n Proto config, nanoservice architecture with actual isolation semantics. No bullshit about what it does (runs JS/Wasm at the edge, locally). The warning about sandbox limitations is refreshingly honest. Science score modest because it's primarily integration work rather than novel research, though the compatibility-date system is clever. Signal is ...