Iroh 1.0 freezes its peer-to-peer networking wire protocol

Category: Infrastructure
Status: confirmed
Sources: Iroh 1.0 announcement, HN discussion
Summary: The n0 team released Iroh 1.0 on 2026-06-15. Iroh is a Rust networking library that addresses devices by cryptographic public key rather than IP, using QUIC with multipath and NAT traversal to open direct peer-to-peer connections and falling back to public relays when no direct path exists. The 1.0 release freezes the wire protocol: a v1 endpoint interoperates with any other v1 endpoint across minor versions and across the language bindings (the Rust crate plus Python, Node.js, Swift, and Kotlin). The project reports that about 95 percent of transferred data typically passes directly between devices. The prior 0.35 line receives no further releases, and public-relay support for it ends 2026-12-31.
Why it matters: A frozen wire protocol with a cross-version and cross-language interoperability guarantee makes Iroh safer to depend on in production for direct device-to-device transport (file sync, streaming, AI training data movement) without routing every byte through cloud servers.
Follow-up: Watch the 0.35 public-relay deprecation on 2026-12-31 and guest-language binding maturity.