{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://csoai-verify.pages.dev/schemas/agent-measurement-card.schema.json",
  "title": "Agent Measurement Card (verified measurement credential)",
  "type": "object",
  "required": ["subject","claim","score_vector","method","measurement","grammar"],
  "properties": {
    "subject": {"type": "string", "description": "measured subject (model/agent/system)"},
    "subject_digest": {"type": "string", "format": "sha256"},
    "claim": {"const": "measurement"},
    "score_vector": {
      "type": "object",
      "additionalProperties": {"type": "object", "properties": {
        "score": {"type": "number"}, "ci": {"type": "number"}, "n": {"type": "integer"}
      }}
    },
    "suite_version_hash": {"type": "string"},
    "environment_commitment": {"type": "string"},
    "replay_merkle_root": {"type": "string"},
    "method": {"type": "string"},
    "timestamps": {"type": "object", "properties": {"issued": {"type": "string", "format": "date-time"}}},
    "measurement": {"type": "string", "description": "the measured finding"},
    "grammar": {"const": "verified measurement credential - measurement, not certification"},
    "register": {"enum": ["MEASURED","REPORTED","UNMEASURED"]},
    "signature": {
      "type": "object", "required": ["kind","sig","body_sha256","pubkey"],
      "properties": {
        "kind": {"const": "ed25519"}, "sig": {"type": "string", "format": "base64"},
        "body_sha256": {"type": "string", "format": "sha256"}, "pubkey": {"type": "string", "format": "base64"}
      }
    }
  },
  "allOf": [],
  "additionalProperties": true
}