{
  "id": "artifact-lineage",
  "version": "1.0.0",
  "title": "派生产物携带 lineage",
  "summary": "B 由 A 派生时，Store 必须记录这条边；否则证据链在第二步就断了。",
  "steps": [
    "open_session",
    "save_raw",
    "save_derived",
    "assert_lineage"
  ],
  "permissions": [
    "workspace:write"
  ],
  "artifacts": [
    "raw.csv",
    "derived.csv"
  ],
  "failure_conditions": [
    "lineage 边缺失",
    "派生产物指向错误的输入版本"
  ],
  "cases": [
    {
      "id": "artifact-lineage/derived",
      "title": "派生产物记录输入版本",
      "outcome": "provenance",
      "inputs": {
        "assert_lineage": {
          "input": "raw",
          "output": "derived"
        },
        "*": {},
        "save_raw": {
          "filename": "raw.csv",
          "content": "sample,value\na,1\n",
          "as": "raw"
        },
        "save_derived": {
          "filename": "derived.csv",
          "content": "mean\n0.93\n",
          "as": "derived",
          "derived_from": [
            "raw"
          ]
        }
      },
      "expect": {
        "edges__truthy": true
      }
    },
    {
      "id": "artifact-lineage/missing-input",
      "title": "声明的输入不存在时不得伪造边",
      "outcome": "failure",
      "inputs": {
        "assert_lineage": {
          "input": "never_saved",
          "output": "derived"
        },
        "save_raw": {
          "filename": "raw.csv",
          "content": "sample,value\na,1\n",
          "as": "raw"
        },
        "save_derived": {
          "filename": "derived.csv",
          "content": "x\n",
          "as": "derived"
        }
      },
      "expect": {
        "error_type": "KeyError"
      }
    }
  ]
}