We've added JavaScript-native RPC to Cloudflare Workers

Cloudflare Workers introduces a built-in RPC system enabling seamless, low-boilerplate Worker-to-Worker and Worker-to–Durable Object calls using idiomatic JavaScript classes, structured-clone data, function/object pass-through via proxies, streaming, and near-zero latency for same-thread calls. The system emphasizes capability-based security and named entrypoints to restrict access, supports TypeScript typings for client stubs, integrates directly with Durable Objects (including speculative promise pipelining to reduce network round trips), and aims to reduce supply-chain risk by minimizing dependencies while opening possibilities for future custom bindings.