I built an RSC renderer in Rust by reverse engineering React's Flight protocol. The wire format, the serializer, the streaming machinery. I got it wrong in ways that taught me exactly how React internals work. Then I integrated the canonical Fizz renderer and discovered why React's approach exists. This talk walks through the Flight wire format, the bugs that revealed React's design contracts, and the delta between a custom implementation and React's actual architecture.
This talk has been presented at React Advanced 2026, check out the latest edition of this React Conference.




















