{
  "tool_id": "art-25-a2a-agent-card-validator",
  "kernel_id": "art-25-a2a-agent-card-validator",
  "display_name": "A2A Agent Card Validator & Extension Checker",
  "tool_version": "1.0.0",
  "mandate_type": "compliance_control",
  "purpose": "Validates an A2A agent-card.json against the v1.0 shape: identity fields, capabilities, extensions (AP2/x402), input/output modes, skills, provider, signed-card JWS block. Branch B, node 1 of the Agentic Rail Chain. Promoted from T283.",
  "control_description": "Validates an A2A agent-card.json against the v1.0 shape: identity fields, capabilities, extensions (AP2/x402), input/output modes, skills, provider, signed-card JWS block. Branch B, node 1 of the Agentic Rail Chain. Promoted from T283.",
  "declared_inputs": [
    "art-22-agentic-payments-protocol-comparator"
  ],
  "declared_outputs": [
    "art-26-x402-payload-decoder-flow-simulator",
    "art-18-mcp-developer-readiness-scorecard",
    "ptg-01-ap2-prompt-template-generator"
  ],
  "kernel_digest": "sha256:224604a0e6073f69216b671c693ab41c03e588e68fa8c0f397d847514654e9f4",
  "trust_label": "deferred -- deterministic source published, zkVM proof not yet generated",
  "data_vintage": "2026-07-10",
  "last_validated": "2026-07-10",
  "conformance_fixtures_vendored": false,
  "compute_proof_ready": "ready",
  "wave": "A",
  "source_url": "https://ainumbers.co/chaingraph/art-25-a2a-agent-card-validator.html",
  "generated_at": "2026-07-25T20:02:55.601Z"
}