{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "jupyter-notebook-document.json",
  "title": "Jupyter Notebook Document",
  "description": "Schema for the Jupyter Notebook file format (.ipynb), based on nbformat v4. A notebook document is a JSON file containing an ordered list of cells (code, markdown, raw) along with metadata about the notebook and kernel.",
  "type": "object",
  "properties": {
    "nbformat": {
      "type": "integer",
      "description": "The major version of the notebook format. Currently 4.",
      "const": 4
    },
    "nbformat_minor": {
      "type": "integer",
      "description": "The minor version of the notebook format (e.g., 5).",
      "minimum": 0
    },
    "metadata": {
      "$ref": "#/$defs/NotebookMetadata"
    },
    "cells": {
      "type": "array",
      "description": "Ordered list of cells in the notebook.",
      "items": {
        "$ref": "#/$defs/Cell"
      }
    }
  },
  "required": ["nbformat", "nbformat_minor", "metadata", "cells"],
  "additionalProperties": false,
  "$defs": {
    "NotebookMetadata": {
      "type": "object",
      "description": "Notebook-level metadata.",
      "properties": {
        "kernelspec": {
          "$ref": "#/$defs/KernelspecMetadata"
        },
        "language_info": {
          "$ref": "#/$defs/LanguageInfo"
        },
        "title": {
          "type": "string",
          "description": "Title of the notebook."
        },
        "authors": {
          "type": "array",
          "description": "Authors of the notebook.",
          "items": {
            "type": "object",
            "properties": {
              "name": {
                "type": "string"
              }
            }
          }
        }
      },
      "additionalProperties": true
    },
    "KernelspecMetadata": {
      "type": "object",
      "description": "Kernel specification metadata embedded in the notebook.",
      "properties": {
        "name": {
          "type": "string",
          "description": "Name of the kernel specification."
        },
        "display_name": {
          "type": "string",
          "description": "Human-readable name for the kernel."
        },
        "language": {
          "type": "string",
          "description": "Programming language of the kernel."
        }
      },
      "required": ["name", "display_name"],
      "additionalProperties": true
    },
    "LanguageInfo": {
      "type": "object",
      "description": "Information about the programming language.",
      "properties": {
        "name": {
          "type": "string",
          "description": "Language name."
        },
        "version": {
          "type": "string",
          "description": "Language version."
        },
        "mimetype": {
          "type": "string",
          "description": "MIME type for the language."
        },
        "file_extension": {
          "type": "string",
          "description": "File extension for the language."
        },
        "pygments_lexer": {
          "type": "string",
          "description": "Pygments lexer name for syntax highlighting."
        },
        "codemirror_mode": {
          "description": "CodeMirror mode for editor syntax highlighting. Can be a string or object.",
          "oneOf": [
            {"type": "string"},
            {
              "type": "object",
              "properties": {
                "name": {"type": "string"},
                "version": {"type": "integer"}
              },
              "required": ["name"]
            }
          ]
        },
        "nbconvert_exporter": {
          "type": "string",
          "description": "nbconvert exporter name."
        }
      },
      "required": ["name"],
      "additionalProperties": true
    },
    "Cell": {
      "description": "A notebook cell. Can be a code cell, markdown cell, or raw cell.",
      "oneOf": [
        {"$ref": "#/$defs/CodeCell"},
        {"$ref": "#/$defs/MarkdownCell"},
        {"$ref": "#/$defs/RawCell"}
      ]
    },
    "CodeCell": {
      "type": "object",
      "description": "A cell containing executable code.",
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique cell identifier (nbformat 4.5+)."
        },
        "cell_type": {
          "type": "string",
          "const": "code",
          "description": "Cell type identifier."
        },
        "source": {
          "$ref": "#/$defs/MultilineString"
        },
        "metadata": {
          "$ref": "#/$defs/CellMetadata"
        },
        "outputs": {
          "type": "array",
          "description": "Outputs from executing this cell.",
          "items": {
            "$ref": "#/$defs/Output"
          }
        },
        "execution_count": {
          "type": ["integer", "null"],
          "description": "The execution count for this cell, or null if not executed.",
          "minimum": 0
        }
      },
      "required": ["cell_type", "source", "metadata", "outputs", "execution_count"],
      "additionalProperties": false
    },
    "MarkdownCell": {
      "type": "object",
      "description": "A cell containing Markdown text.",
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique cell identifier."
        },
        "cell_type": {
          "type": "string",
          "const": "markdown",
          "description": "Cell type identifier."
        },
        "source": {
          "$ref": "#/$defs/MultilineString"
        },
        "metadata": {
          "$ref": "#/$defs/CellMetadata"
        },
        "attachments": {
          "type": "object",
          "description": "MIME-bundle attachments for the cell (e.g., inline images).",
          "additionalProperties": {
            "$ref": "#/$defs/MimeBundle"
          }
        }
      },
      "required": ["cell_type", "source", "metadata"],
      "additionalProperties": false
    },
    "RawCell": {
      "type": "object",
      "description": "A raw cell that is not rendered or executed.",
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique cell identifier."
        },
        "cell_type": {
          "type": "string",
          "const": "raw",
          "description": "Cell type identifier."
        },
        "source": {
          "$ref": "#/$defs/MultilineString"
        },
        "metadata": {
          "$ref": "#/$defs/CellMetadata"
        },
        "attachments": {
          "type": "object",
          "description": "MIME-bundle attachments.",
          "additionalProperties": {
            "$ref": "#/$defs/MimeBundle"
          }
        }
      },
      "required": ["cell_type", "source", "metadata"],
      "additionalProperties": false
    },
    "CellMetadata": {
      "type": "object",
      "description": "Cell-level metadata.",
      "properties": {
        "collapsed": {
          "type": "boolean",
          "description": "Whether the cell is collapsed."
        },
        "scrolled": {
          "description": "Whether the output area is scrolled.",
          "oneOf": [
            {"type": "boolean"},
            {"type": "string", "const": "auto"}
          ]
        },
        "deletable": {
          "type": "boolean",
          "description": "Whether the cell can be deleted."
        },
        "editable": {
          "type": "boolean",
          "description": "Whether the cell can be edited."
        },
        "name": {
          "type": "string",
          "description": "Optional name for the cell."
        },
        "tags": {
          "type": "array",
          "description": "Tags for the cell.",
          "items": {
            "type": "string"
          },
          "uniqueItems": true
        },
        "jupyter": {
          "type": "object",
          "description": "Jupyter-specific metadata.",
          "properties": {
            "source_hidden": {
              "type": "boolean",
              "description": "Whether the source is hidden."
            },
            "outputs_hidden": {
              "type": "boolean",
              "description": "Whether the outputs are hidden."
            }
          },
          "additionalProperties": true
        }
      },
      "additionalProperties": true
    },
    "Output": {
      "description": "An output from a code cell execution.",
      "oneOf": [
        {"$ref": "#/$defs/StreamOutput"},
        {"$ref": "#/$defs/DisplayDataOutput"},
        {"$ref": "#/$defs/ExecuteResultOutput"},
        {"$ref": "#/$defs/ErrorOutput"}
      ]
    },
    "StreamOutput": {
      "type": "object",
      "description": "Stream output (stdout or stderr).",
      "properties": {
        "output_type": {
          "type": "string",
          "const": "stream"
        },
        "name": {
          "type": "string",
          "description": "The stream name.",
          "enum": ["stdout", "stderr"]
        },
        "text": {
          "$ref": "#/$defs/MultilineString"
        }
      },
      "required": ["output_type", "name", "text"],
      "additionalProperties": false
    },
    "DisplayDataOutput": {
      "type": "object",
      "description": "Rich display data output.",
      "properties": {
        "output_type": {
          "type": "string",
          "const": "display_data"
        },
        "data": {
          "$ref": "#/$defs/MimeBundle"
        },
        "metadata": {
          "type": "object",
          "description": "Metadata keyed by MIME type.",
          "additionalProperties": true
        }
      },
      "required": ["output_type", "data", "metadata"],
      "additionalProperties": false
    },
    "ExecuteResultOutput": {
      "type": "object",
      "description": "Result of code execution with an execution count.",
      "properties": {
        "output_type": {
          "type": "string",
          "const": "execute_result"
        },
        "execution_count": {
          "type": ["integer", "null"],
          "minimum": 0
        },
        "data": {
          "$ref": "#/$defs/MimeBundle"
        },
        "metadata": {
          "type": "object",
          "additionalProperties": true
        }
      },
      "required": ["output_type", "execution_count", "data", "metadata"],
      "additionalProperties": false
    },
    "ErrorOutput": {
      "type": "object",
      "description": "Error output from a failed execution.",
      "properties": {
        "output_type": {
          "type": "string",
          "const": "error"
        },
        "ename": {
          "type": "string",
          "description": "Exception name."
        },
        "evalue": {
          "type": "string",
          "description": "Exception value."
        },
        "traceback": {
          "type": "array",
          "description": "Traceback frames as strings.",
          "items": {
            "type": "string"
          }
        }
      },
      "required": ["output_type", "ename", "evalue", "traceback"],
      "additionalProperties": false
    },
    "MimeBundle": {
      "type": "object",
      "description": "A MIME-type keyed dictionary of data representations.",
      "properties": {
        "text/plain": {
          "$ref": "#/$defs/MultilineString"
        },
        "text/html": {
          "$ref": "#/$defs/MultilineString"
        },
        "text/latex": {
          "$ref": "#/$defs/MultilineString"
        },
        "text/markdown": {
          "$ref": "#/$defs/MultilineString"
        },
        "application/json": {
          "description": "JSON data."
        },
        "application/javascript": {
          "$ref": "#/$defs/MultilineString"
        },
        "image/png": {
          "type": "string",
          "description": "Base64-encoded PNG image data."
        },
        "image/jpeg": {
          "type": "string",
          "description": "Base64-encoded JPEG image data."
        },
        "image/gif": {
          "type": "string",
          "description": "Base64-encoded GIF image data."
        },
        "image/svg+xml": {
          "$ref": "#/$defs/MultilineString"
        }
      },
      "additionalProperties": true
    },
    "MultilineString": {
      "description": "A string or array of strings representing multiline text. When an array, each element represents a line.",
      "oneOf": [
        {"type": "string"},
        {
          "type": "array",
          "items": {"type": "string"}
        }
      ]
    }
  }
}