Skip to content
Origin 89Origin 89 Docs

KM43 protocol

KM43 is the bounded, authenticated message protocol between an Origin 89 controller and its clients. It is link-agnostic: UART, WebSocket, USB, BLE, and MQTT change the framing beneath it, not the message semantics above it.

Normative draft 192 numbered controller and link requirements with stable public anchors.

Understand

Section titled “Understand”
Why Protocol rationale The concrete failures, security boundaries, and tradeoffs behind the protocol. Map Protocol map Authentication stages, message families, and allocated code spaces at a glance.

Build

Section titled “Build”
Normative KM43 v1.0 specification The wire, message by message, including limits, authentication, sessions, and failures. Internal link Controller–comms protocol Link-local lifecycle, heartbeat, flow control, credentials, and firmware release. Reference Number registry Every message type, outcome, capability, field, and reserved range.

Verify

Section titled “Verify”
Bytes Known-good test vectors Reproducible frames, derivations, MACs, and encoded message bodies. Plan Verification plan Traceability gates, hostile-link cases, properties, differential tests, and conformance. Open Deferred decisions Questions left open deliberately, with the evidence and trigger required to settle each one.

Machine-readable sources

Section titled “Machine-readable sources”