Keynote: The Agent2Agent (A2A) Protocol
summary
An open protocol for agent-to-agent communication defines a JSON agent card that publishes name, description, skills and contact methods; a single-method RPC surface currently as JSON RPC (v0.2) with planned gRPC and REST options (v0.3); three response modes—blocking request/response, SSE progress streams, and webhook push notifications—for long-running tasks; an extensions system for richer schemas; a registry proposal for discovery; ongoing work on identity, trust and reputation; now hosted at the Linux Foundation.
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