{
  "version": {
    "major": 1,
    "minor": 0,
    "patch": 0
  },
  "metadata": {
    "session_id": "ruchy-session-1756788744",
    "created_at": "2025-09-02T04:52:24.722741580+00:00",
    "ruchy_version": "1.30.1",
    "student_id": null,
    "assignment_id": null,
    "tags": [
      "interactive"
    ]
  },
  "environment": {
    "seed": 0,
    "feature_flags": [],
    "resource_limits": {
      "heap_mb": 100,
      "stack_kb": 8192,
      "cpu_ms": 5000
    }
  },
  "timeline": [
    {
      "id": 1,
      "timestamp_ns": 88540,
      "event": {
        "Input": {
          "text": "\"hello\".upper()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 2,
      "timestamp_ns": 269208,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"\\\"HELLO\\\"\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 3,
      "timestamp_ns": 273095,
      "event": {
        "Input": {
          "text": "\"WORLD\".lower()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 4,
      "timestamp_ns": 278730,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"\\\"world\\\"\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 5,
      "timestamp_ns": 280672,
      "event": {
        "Input": {
          "text": "\"  spaces  \".trim()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 6,
      "timestamp_ns": 285524,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"\\\"spaces\\\"\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 7,
      "timestamp_ns": 287048,
      "event": {
        "Input": {
          "text": "",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 8,
      "timestamp_ns": 287817,
      "event": {
        "Input": {
          "text": "[1, 2, 3].len()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 9,
      "timestamp_ns": 306558,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"3\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 10,
      "timestamp_ns": 309132,
      "event": {
        "Input": {
          "text": "[1, 2, 3, 4, 5].head()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 11,
      "timestamp_ns": 315110,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"1\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 12,
      "timestamp_ns": 316860,
      "event": {
        "Input": {
          "text": "",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 13,
      "timestamp_ns": 317755,
      "event": {
        "Input": {
          "text": "let text = \"Hello World\"",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 14,
      "timestamp_ns": 326323,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"\\\"Hello World\\\"\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 15,
      "timestamp_ns": 328333,
      "event": {
        "Input": {
          "text": "text.len()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 16,
      "timestamp_ns": 332870,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"11\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 17,
      "timestamp_ns": 334063,
      "event": {
        "Input": {
          "text": "",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 18,
      "timestamp_ns": 335661,
      "event": {
        "Input": {
          "text": "let arr = [10, 20, 30, 40]",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 19,
      "timestamp_ns": 344039,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"[10, 20, 30, 40]\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 20,
      "timestamp_ns": 345814,
      "event": {
        "Input": {
          "text": "arr.len()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 21,
      "timestamp_ns": 350244,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"4\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 22,
      "timestamp_ns": 351385,
      "event": {
        "Input": {
          "text": "",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 23,
      "timestamp_ns": 352249,
      "event": {
        "Input": {
          "text": "\"hello world\".split(\" \")",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 24,
      "timestamp_ns": 359550,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"[\\\"hello\\\", \\\"world\\\"]\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 25,
      "timestamp_ns": 360818,
      "event": {
        "Input": {
          "text": "",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 26,
      "timestamp_ns": 361524,
      "event": {
        "Input": {
          "text": "let name = \"alice\"",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 27,
      "timestamp_ns": 368149,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"\\\"alice\\\"\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 28,
      "timestamp_ns": 369975,
      "event": {
        "Input": {
          "text": "name.upper()",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 29,
      "timestamp_ns": 374417,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"\\\"ALICE\\\"\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 30,
      "timestamp_ns": 375576,
      "event": {
        "Input": {
          "text": "",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 31,
      "timestamp_ns": 376820,
      "event": {
        "Input": {
          "text": "\"test string\".replace(\"test\", \"demo\")",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 32,
      "timestamp_ns": 383731,
      "event": {
        "Output": {
          "result": {
            "Success": {
              "value": "String(\"\\\"demo string\\\"\")"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 33,
      "timestamp_ns": 384959,
      "event": {
        "Input": {
          "text": "",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 34,
      "timestamp_ns": 386765,
      "event": {
        "Input": {
          "text": "[5, 10, 15].map(fun(x) { x * 2 })",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 35,
      "timestamp_ns": 853990,
      "event": {
        "Output": {
          "result": {
            "Error": {
              "message": "map currently only supports lambda expressions"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    },
    {
      "id": 36,
      "timestamp_ns": 874028,
      "event": {
        "Input": {
          "text": "[1, 2, 3, 4, 5].filter(fun(x) { x > 3 })",
          "mode": "Interactive"
        }
      },
      "causality": []
    },
    {
      "id": 37,
      "timestamp_ns": 1292174,
      "event": {
        "Output": {
          "result": {
            "Error": {
              "message": "filter currently only supports lambda expressions"
            }
          },
          "stdout": [],
          "stderr": []
        }
      },
      "causality": []
    }
  ],
  "checkpoints": {}
}