{
      "tool_id": "art-116-product-lineage-builder",
      "tool_version": "1.0.0",
      "display_name": "Digital Product Passport Cradle-to-Gate Lineage Builder",
      "mcp_name": "build_product_lineage",
      "mandate_type": "compliance_mandate",
      "wave": 22,
      "gpu": false,
      "url": "https://ainumbers.co/chaingraph/art-116-product-lineage-builder.html",
      "description": "Build a cradle-to-gate supplier lineage with hash-only claims per stage (no trade secrets). Each stage carries a supplier_hash anchor, dataVersion-pinned certification, and carbon_value. Aggregates total carbon deterministically.",
      "input_schema_ref": "chaingraph/art-116-product-lineage-builder.html#manifest",
      "consumes": [
        "art-115-dpp-data-carrier-validator"
      ],
      "feeds": [
        "art-117-product-authenticity-verifier"
      ],
      "status": "live",
      "conformance_fixtures": true,
      "compute_capability": "server",
      "compute_images": [{"system":"sha256-source","image_id":"sha256:c90285303f490a09ce2e73fc197bc99fb23ca31e2db96426f18f373ba021c574","valid_from":"2026-07-10"},{"system":"risc0","image_id":"sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6","valid_from":"2026-06-28"}],
      "compute_proof": {
        "type": "ZkVmReceipt",
        "system": "risc0",
        "receiptFormat": "groth16-bn254",
        "imageId": "sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6",
        "seal": "FlqYLEKG7M56js1P375Y9Npx5iyc4+1Dz/WKfVn66V0D3jthtVXohSiLiNMDVgCO/px9Esjb3m2vglwKoWbJSwn6tQEUOaVhIHnAZqzTB+1xZ6tQue20hf77J2/lnk+jEM/MZEpgFUwZb4PE4Is9OeA+B0NjMI/EmpCfhunSOmkp1P1cOmPQvvVOEFSebAmS2BpOY5Wz9hwoaeAmGnDlWhiw4c3/S6mjquBKOwO32BpTjTjFXQa+xjJ5N5PHILqiD96eJB+Z66tDxzYOmPoK9TVEfh/8lkVNYcGniBNiwDkSTO0F7pSFX+SyNQinuRBApbxYmncLdBcrmnXp9YXAHw==",
        "journal": {
          "chaingraph_version": "0.4.0",
          "kernel_digest": "sha256:92c7a70da3fa42af58e1ddedf9eaa77541196957e7addd01581dbbe9922d33d4",
          "output": {
            "depth": 3,
            "lineage": [
              {
                "anchored": true,
                "certification": "ISO14001",
                "dataVersion": "2026-01",
                "depth": 0,
                "stage": "raw_material_extraction"
              },
              {
                "anchored": true,
                "certification": "SA8000",
                "dataVersion": "2026-01",
                "depth": 1,
                "stage": "manufacturing"
              },
              {
                "anchored": true,
                "certification": null,
                "dataVersion": "2026-01",
                "depth": 2,
                "stage": "distribution"
              }
            ],
            "product_id": "GS1-DL-8712345678901",
            "total_carbon": 10.4
          }
        }
      }
    }