3ec09de87e50f75da4fb5bca468d34e07274ccb8
Establishes VERSIONING.md: SemVer 0.x (MINOR = breaking wire change) for the release version, and per-plane protocol versions enforced on the wire so incompatible peers fail fast and legibly instead of via silent decode/signature errors. ⚠️ BREAKING WIRE CHANGE — all peers must run >= 0.2.0 to interoperate (ALPNs and gossip subscription topics changed). A pre-0.2.0 peer (e.g. an un-resynced dopedart) can no longer connect, by design, and now fails at the handshake. - New src/protocol.rs: single source of truth for AUDIO/FRIENDS/GOSSIP_PROTO, the derived ALPNs (peerspeak/audio/1, peerspeak/friends/1), GOSSIP_SIG_DOMAIN, and versioned_topic(). Unit tests assert ALPN/domain strings match their integer versions (no silent drift) + that topic namespacing is deterministic. - Unified ALPNs: audio was b"peerspeak-audio" (unversioned, and duplicated in iroh_impl.rs + core/mod.rs) -> peerspeak/audio/1 from protocol.rs; friends re-exports protocol::FRIENDS_ALPN (was peerspeak/friends/0 -> /1). - Gossip: subscribe to versioned_topic(ticket.topic_id) so different gossip versions never share a swarm; the raw topic_id stays the room identity and what signatures bind. GOSSIP_SIG_DOMAIN centralized into protocol.rs. - Cargo.toml 0.1.0 -> 0.2.0. 316 lib tests / clippy --all-targets clean. VERSIONING.md documents the bump rules, the "I changed X -> what do I bump" table, and a release checklist. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>