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# 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.
- **Kafka at the edge, plus identity.** Filtered subscriptions over WebSocket give browsers and agents direct access to the event stream without a gateway layer.
## Protocol
See [PROTOCOL.md](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.
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