{
  "description": "Reverse mode's last step: adjoints have reached every input, giving the whole gradient",
  "calls": {
    "handle_set_function": {
      "args": {
        "expression": "x*y + y"
      },
      "result": {
        "inputs": [
          "x",
          "y"
        ],
        "constants": {},
        "nodes": [
          {
            "id": "w1",
            "kind": "input",
            "name": "x"
          },
          {
            "id": "w2",
            "kind": "input",
            "name": "y"
          },
          {
            "id": "w3",
            "kind": "op",
            "op": "mul",
            "args": [
              "w1",
              "w2"
            ]
          },
          {
            "id": "w4",
            "kind": "op",
            "op": "add",
            "args": [
              "w3",
              "w2"
            ]
          }
        ],
        "output": "w4"
      }
    },
    "handle_set_run": {
      "args": {
        "mode": "reverse",
        "inputs": {
          "x": 2,
          "y": 3
        }
      },
      "result": {
        "steps": 5
      }
    },
    "handle_state": {
      "args": {
        "iteration": 5
      },
      "result": {
        "step": {
          "phase": "backward",
          "node": "w3",
          "value": 6.0,
          "derivative": 1.0,
          "partials": [
            {
              "arg": "w1",
              "partial": 3.0,
              "amount": 3.0
            },
            {
              "arg": "w2",
              "partial": 2.0,
              "amount": 2.0
            }
          ]
        },
        "values": {
          "w1": 2.0,
          "w2": 3.0,
          "w3": 6.0,
          "w4": 9.0
        },
        "derivatives": {
          "w4": 1.0,
          "w3": 1.0,
          "w2": 3.0,
          "w1": 3.0
        }
      }
    }
  }
}