A2ATProtocol | Agent-to-Agent (A2A) Protocols, Machine-Readable Capability Discovery & Autonomous Negotiation
Spécifications industrielles pour Agent-to-Agent (A2A) Protocols, Machine-Readable Capability Discovery & Autonomous Negotiation. Implémentation de découverte standardisée de capacités, poignées de main gRPC / JSON-RPC 2.0, attestation cryptographique W3C DID et coordination décentralisée d'essaim.
Agent-to-Agent (A2A) Operational Protocol Modes
- 01. A2A Handshake & Capability Discovery: Standardized bi-directional handshake establishing secure gRPC/HTTP-2 transport. Agents exchange OpenAPI 3.1 capability schemas and negotiate cryptographic session tokens. (Flow: Agent Client -> Service Discovery Probe -> Schema Exchange (JSON Schema) -> Token Issue -> Session Lock)
- 02. W3C DID Cryptographic Attestation: Decentralized identity verification enforcing Ed25519 digital signatures. Verifiable credentials prove agent authenticity and ownership without central identity providers. (Flow: DID Resolution -> Document Parsing (did:key / did:ion) -> Challenge Signature -> Proof Verified -> Authorized Mesh)
- 03. Swarm Consensus & Task Delegation: Decentralized task distribution using contract-net bidding and BFT consensus. Sub-tasks are dynamically auctioned and assigned across heterogeneous autonomous agents. (Flow: Mission Objective -> Decomposition -> Auction Broadcast -> Capability Bidding -> Atomic Escrow Assignment)
- 04. Agent2Website (A2W) Web Automation: Semantic web interaction through /llms.txt endpoints and accessibility tree navigation. Converts complex web interfaces into token-efficient machine-readable actions. (Flow: Target Domain -> /llms.txt Ingress -> AXTree Distillation -> Scoped Passkey Injection -> Verified DOM Action)
Multi-Agent System Architectural Layers
- Layer 1: Agent Communication & Transport Core: High-throughput binary messaging over WebTransport / QUIC streams and gRPC over TLS. Supports zero-copy Cap'n Proto serialization and Noise Protocol mutual authentication.
- Layer 2: Semantic Schema & Prompt Metamodels: Strict JSON Schema metamodels, TypeChat interfaces, and vendor-neutral prompt interchange formats guaranteeing zero-hallucination structured tool invocation across multi-model swarms.
- Layer 3: Decentralized Registry & Vector Discovery: High-dimensional vector embedding indexing paired with Kademlia DHT peer tracking. Enables autonomous discovery of specialized partner agents based on semantic task requirements.
- Layer 4: AgentOps, Governance & Safety Circuit Breakers: OpenTelemetry tracing conventions for AI agents, real-time token expenditure tracking, and automated circuit breakers preventing recursive delegation loops and catastrophic goal drift.
A2A Operational Benchmarks & Latency Telemetry: < 4.8 ms (A2A Handshake Latency) | 100% (Type-Safe Schema Fidelity) | 78% (Binary Token Bandwidth Saved) | Ed25519 (W3C DID Cryptographic Proof)
Core Specifications
- Agent-to-Agent Protocol Specification and Bi-Directional Handshakes — Standardizing bi-directional A2A communication handshakes, session token issuance, and latency bounds over gRPC and HTTP/2 for autonomous multi-agent systems. Cette spécification technique décrit les principes architecturaux fondamentaux, les formats de message, les garanties cryptographiques et les enveloppes opérationnelles mises en œuvre sur A2ATProtocol.
- Semantic Capability Discovery and Schema Negotiation — Formulating protocols allowing autonomous software agents to dynamically negotiate schemas, tool APIs, and payload serializations without human intervention. Cette spécification technique décrit les principes architecturaux fondamentaux, les formats de message, les garanties cryptographiques et les enveloppes opérationnelles mises en œuvre sur A2ATProtocol.
- Cryptographic Agent Identity and W3C DID Attestation — Implementing Ed25519 signatures, W3C Decentralized Identifiers (DIDs), and verifiable credentials to eliminate spoofing and establish verifiable agent provenance. Cette spécification technique décrit les principes architecturaux fondamentaux, les formats de message, les garanties cryptographiques et les enveloppes opérationnelles mises en œuvre sur A2ATProtocol.
Technical Whitepapers & Research