{
  "tool_id": "art-130-signature-directory-validator",
  "kernel_id": "art-130-signature-directory-validator",
  "display_name": "HTTP Signatures Directory Validator",
  "tool_version": "1.0.0",
  "mandate_type": "compliance_mandate",
  "purpose": "Validate the /.well-known/http-message-signatures-directory JWKS: well-formed, keys are OKP/Ed25519, the keyid from Signature-Input resolves to a key in the directory, well-known path correct. Agent fetches the directory once and passes the JSON. Consumes art-129, feeds art-131.",
  "control_description": "Validate the /.well-known/http-message-signatures-directory JWKS: well-formed, keys are OKP/Ed25519, the keyid from Signature-Input resolves to a key in the directory, well-known path correct. Agent fetches the directory once and passes the JSON. Consumes art-129, feeds art-131.",
  "declared_inputs": [
    "art-129-webbotauth-signature-verifier"
  ],
  "declared_outputs": [
    "art-131-signature-agent-card-validator"
  ],
  "kernel_digest": "sha256:db148368f675c5d641f2c9ea89f3b543c2bd3e2fbf2ab45410f829800ad7ac44",
  "trust_label": "deferred -- deterministic source published, zkVM proof not yet generated",
  "data_vintage": "2026-07-10",
  "last_validated": "2026-07-10",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 24,
  "source_url": "https://ainumbers.co/chaingraph/art-130-signature-directory-validator.html",
  "generated_at": "2026-07-25T20:02:55.601Z"
}