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SAE-OVER-A2A.md

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SAE over A2A

Version: 0.1.0-draft

Purpose

This document defines the recommended way to carry SAE through A2A interactions.

Boundary

Use A2A for:

  • discovery
  • Agent Cards
  • tasks
  • messages
  • artifacts
  • streaming
  • push

Use SAE for:

  • objective
  • constraints
  • deliverable shape
  • delegation hints
  • review posture
  • preference hints

Agent Card Signaling

An A2A agent that supports SAE should declare:

  • a skill or capability describing SAE support
  • optional extension declarations
  • a metadata flag indicating supportsSaeOverA2A

Draft Extension Identifiers

  • https://structuredagentexchange.org/extensions/task/v0.1
  • https://structuredagentexchange.org/extensions/preferences/v0.1

Usage Model

  1. Client discovers agent through A2A Agent Card
  2. Client sees SAE support
  3. Client sends normal A2A task/message plus SAE attachment
  4. Remote agent parses SAE fields
  5. Agent returns normal A2A response while preserving SAE-aware metadata

Value Claim

A2A lets agents connect and exchange work. SAE helps them share the same shape of the work.