docs: A2A Receipt Profile and MCP Evidence Profile specs#420
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jithinraj merged 2 commits intofeat/evidence-carrier-typesfrom Feb 23, 2026
Merged
docs: A2A Receipt Profile and MCP Evidence Profile specs#420jithinraj merged 2 commits intofeat/evidence-carrier-typesfrom
jithinraj merged 2 commits intofeat/evidence-carrier-typesfrom
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A2A Receipt Profile (docs/specs/A2A-RECEIPT-PROFILE.md): - Extension URI: https://www.peacprotocol.org/ext/traceability/v1 - Agent Card capabilities.extensions[] declaration (A2A v0.3.0) - Metadata layout: metadata[extensionURI] = { carriers: [...] } - A2A-Extensions header convention - Lifecycle: when to attach at TaskStatus transitions - Security: namespace isolation, SSRF, no prompt leakage MCP Evidence Profile (docs/specs/MCP-EVIDENCE-PROFILE.md): - _meta key schema: org.peacprotocol/receipt_ref, receipt_jws - Reserved key guard: second label rule per MCP 2025-11-25 - Legacy compatibility (DD-125): 3-phase deprecation plan - Legacy key migration from org.peacprotocol/receipt - Migration guide from peac_receipt to _meta format
…8174 - A2A-RECEIPT-PROFILE: Agent Card params use issuer_config_url pointing to peac-issuer.json (not jwks_uri directly) to preserve the normative issuer configuration discovery chain - Both A2A and MCP profile specs: add RFC 8174 alongside RFC 2119 per BCP 14 for correct normative keyword interpretation
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Summary
New files
docs/specs/A2A-RECEIPT-PROFILE.md: Normative spec for A2A extension placementdocs/specs/MCP-EVIDENCE-PROFILE.md: Normative spec for MCP _meta key placementDesign decisions
peac_receiptdeprecation (3-phase)Test plan
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