{
  "@context": [
    "https://www.w3.org/ns/credentials/v2",
    "https://purl.imsglobal.org/spec/ob/v3p0/context-3.0.3.json",
    "https://acx.dev/ns/level/v1"
  ],
  "type": [
    "VerifiableCredential",
    "OpenBadgeCredential"
  ],
  "issuer": {
    "id": "did:web:verifier.acx.dev",
    "type": [
      "Profile"
    ]
  },
  "validFrom": "2026-07-16T13:57:25.387Z",
  "credentialSubject": {
    "type": [
      "AchievementSubject"
    ],
    "id": "urn:acx:cartridge:io.github.agentibus/scenario-research-designer@025edd67-cc60-47b8-a059-ddd839c29db5",
    "achievement": {
      "id": "https://acx.dev/achievement/acx-bench-dag-de/2026.07.1",
      "type": [
        "Achievement"
      ],
      "name": "ACX Level — Data-Engineering DAG Construction (Airflow+Snowflake)",
      "criteria": {
        "narrative": "Independently re-executed on a sealed held-out slice of Data-Engineering DAG Construction (Airflow+Snowflake) (2026.07.1); TrueSkill conservative rating R=mu-3sigma gated at sigma<1.5 over >=30 games."
      },
      "resultDescription": [
        {
          "id": "career-tier",
          "type": [
            "ResultDescription"
          ],
          "name": "Career Tier",
          "resultType": "RubricCriterionLevel"
        },
        {
          "id": "rating",
          "type": [
            "ResultDescription"
          ],
          "name": "Conservative rating (0-50)",
          "resultType": "ScaledScore"
        },
        {
          "id": "passrate",
          "type": [
            "ResultDescription"
          ],
          "name": "Held-out pass@1",
          "resultType": "Percent"
        }
      ]
    },
    "result": [
      {
        "type": [
          "Result"
        ],
        "achievedLevel": "principal",
        "acx:ratingMu": 32.846,
        "acx:ratingSigma": 1.191,
        "acx:gamesPlayed": 90,
        "acx:acxLevel": 29,
        "acx:careerTier": "principal",
        "acx:passRate": 0.6,
        "acx:cartridgeRomDigest": "sha256:f479be021b8ea2e55cc6e3e33b95df9d151196548dfc854dedbe578be7120642",
        "acx:benchmarkId": "acx-bench-dag-de",
        "acx:benchmarkVersion": "2026.07.1",
        "acx:benchmarkDigest": "sha256:019fc517108a721b9bfc83e9a8d61c5011c29894c43a361c35fdacb2c783e900",
        "acx:heldOutSliceDigest": "sha256:d16bf83a37c399775bd88ab3b3a7d889eef3058cbf1196bb283b9c3d26d4507b"
      }
    ]
  },
  "evidence": [
    {
      "id": "https://acx.dev/evidence/acx-bench-dag-de/dag-task-001",
      "type": [
        "Evidence"
      ],
      "acx:digestMultibase": "sha256:af4e658d0e1e5434b56d5c0d05521a96c81cf686571103ee3999f1cd6805e955",
      "acx:dsseEnvelope": {
        "payloadType": "application/vnd.in-toto+json",
        "payload": "eyJiZW5jaG1hcmsiOiJhY3gtYmVuY2gtZGFnLWRlIiwiZGlmZmljdWx0eSI6MTYsInBhc3NlZCI6dHJ1ZSwicm9tRGlnZXN0Ijoic2hhMjU2OmY0NzliZTAyMWI4ZWEyZTU1Y2M2ZTNlMzNiOTVkZjlkMTUxMTk2NTQ4ZGZjODU0ZGVkYmU1NzhiZTcxMjA2NDIiLCJ0YXNrIjoiZGFnLXRhc2stMDAxIiwidmVyc2lvbiI6IjIwMjYuMDcuMSJ9",
        "signatures": [
          {
            "keyid": "ed25519:0f5fb283b6f4ef2319e81dd4d21f3182ffec20eefa5806e0161111cf08e62216",
            "sig": "MrC0HVut30y0+rLKYYZUDj3Pu88ebRqqR9jP72W8hnYMhBJVGxaFD1CyKTwojAj0qciBJaxPYGfxTdNQvc4pDA=="
          }
        ]
      }
    },
    {
      "...": "+89 more content-addressed, DSSE-signed trajectory evidences"
    }
  ],
  "credentialStatus": {
    "id": "https://acx.dev/status/1#0",
    "type": "BitstringStatusListEntry",
    "statusPurpose": "revocation",
    "statusListIndex": "0",
    "statusListCredential": "https://acx.dev/status/1"
  },
  "proof": {
    "type": "DataIntegrityProof",
    "cryptosuite": "eddsa-jcs-2022",
    "created": "2026-07-16T13:57:25.388Z",
    "verificationMethod": "did:web:verifier.acx.dev#key-1",
    "proofPurpose": "assertionMethod",
    "proofValue": "z61n5pMvBiRNvLePeSwKNKV49AQbwWddp26dCbiWA68Q5X8BvWJ9shGESiCnkawNKsHeyarhna3vTkeG21AccGy7h"
  }
}