pub const PROTOCOL_VERSION: u32 = 2;Expand description
Wire protocol version for the daemon IPC framing.
Increment this constant whenever the request or response frame shape
changes in a backward-incompatible way. The client sends its version
in every request; the daemon rejects mismatches with an explicit error
that names both sides so the operator knows exactly what to do
(make local rebuilds the client binary).
Version history:
1 — initial versioned framing (added protocol_version + version_mismatch);
added probe_only request field + probe-ack sentinel shape in response