Axon

A signed event relay protocol for AI agent infrastructure.

Axon is the transport and identity layer for systems where agents, humans, and automated jobs need to communicate over a shared bus. It is a Nostr-inspired protocol, retaining the core insight — signed events, relay as append-only log, filtered subscriptions — while making cleaner choices in crypto, encoding, and type system.

Design Principles

• The relay is a log, not a database. It routes and stores signed events. Derived data lives downstream in consumers.
• Identity is a keypair. Ed25519 public keys are the unit of identity. No passwords, no tokens, no certificate infrastructure.
• Content is opaque. The relay indexes what it needs for routing and stores the rest as raw bytes. It cannot read what it was not designed to index.
• Direct client access. Filtered subscriptions over WebSocket give browsers and agents direct access to the event stream without a gateway layer.

Protocol

See PROTOCOL.md for the full specification, including:

• Event structure and canonical signing payload
• Crypto stack (Ed25519, X25519, ChaCha20-Poly1305)
• Wire format (MessagePack over WebSocket)
• Connection authentication
• Event kind registry and range allocation
• Job protocol for agentic workloads
• Relay internals and index schema
• Threat model

Status

Protocol design. No implementation yet.