{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "jupyter-contents-model.json",
  "title": "Jupyter Contents Model",
  "description": "Schema for the Jupyter Contents API model representing files, directories, and notebooks in the Jupyter file system. This is the primary data structure returned by the Contents REST API.",
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Name of the file or directory (e.g., 'Untitled.ipynb')."
    },
    "path": {
      "type": "string",
      "description": "Full path relative to the root directory (e.g., 'path/to/Untitled.ipynb')."
    },
    "type": {
      "type": "string",
      "description": "Type of content.",
      "enum": ["notebook", "file", "directory"]
    },
    "writable": {
      "type": "boolean",
      "description": "Whether the requester has write permission."
    },
    "created": {
      "type": "string",
      "format": "date-time",
      "description": "Creation timestamp in ISO 8601 format."
    },
    "last_modified": {
      "type": "string",
      "format": "date-time",
      "description": "Last modification timestamp in ISO 8601 format."
    },
    "size": {
      "type": ["integer", "null"],
      "description": "Size in bytes. Null for directories and notebooks.",
      "minimum": 0
    },
    "mimetype": {
      "type": ["string", "null"],
      "description": "MIME type of the content. Null for directories and notebooks."
    },
    "content": {
      "description": "The content itself. For directories, an array of contents models (without content). For notebooks, the notebook JSON object. For files, a string (text) or base64-encoded string."
    },
    "format": {
      "type": ["string", "null"],
      "description": "Format of the content field.",
      "enum": ["json", "text", "base64", null]
    },
    "hash": {
      "type": ["string", "null"],
      "description": "Hash of the file content for change detection."
    },
    "hash_algorithm": {
      "type": ["string", "null"],
      "description": "Algorithm used to compute the hash (e.g., 'sha256')."
    }
  },
  "required": ["name", "path", "type", "writable", "created", "last_modified"],
  "if": {
    "properties": {
      "type": {"const": "directory"}
    }
  },
  "then": {
    "properties": {
      "content": {
        "type": ["array", "null"],
        "items": {
          "$ref": "#"
        }
      },
      "format": {
        "const": "json"
      }
    }
  }
}