{
  "$defs": {
    "Character": {
      "additionalProperties": false,
      "description": "A recurring person in the story (reused across a series).",
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "name": {
          "minLength": 1,
          "title": "Name",
          "type": "string"
        },
        "role": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "One line in the source language, e.g. '23, gap year in Vienna'.",
          "title": "Role"
        }
      },
      "required": [
        "id",
        "name"
      ],
      "title": "Character",
      "type": "object"
    },
    "ChoiceItem": {
      "additionalProperties": false,
      "properties": {
        "question": {
          "minLength": 1,
          "title": "Question",
          "type": "string"
        },
        "options": {
          "items": {
            "type": "string"
          },
          "minItems": 2,
          "title": "Options",
          "type": "array"
        },
        "answer": {
          "minLength": 1,
          "title": "Answer",
          "type": "string"
        }
      },
      "required": [
        "question",
        "options",
        "answer"
      ],
      "title": "ChoiceItem",
      "type": "object"
    },
    "ClozeTask": {
      "additionalProperties": false,
      "description": "Gap text. Mark every gap as ``{{answer}}``, ``{{answer|alternative}}``\nor ``{{answer::hint}}`` (the hint is required for ``base_form`` and\n``translation`` hints).",
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "cloze",
          "title": "Kind",
          "type": "string"
        },
        "text": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "One connected passage with gaps.",
          "title": "Text"
        },
        "items": {
          "anyOf": [
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Separate sentences with gaps.",
          "title": "Items"
        },
        "hint": {
          "default": "word_bank",
          "enum": [
            "word_bank",
            "first_letter",
            "base_form",
            "translation",
            "none"
          ],
          "title": "Hint",
          "type": "string"
        },
        "distractors": {
          "description": "Extra word-bank words.",
          "items": {
            "type": "string"
          },
          "title": "Distractors",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind"
      ],
      "title": "ClozeTask",
      "type": "object"
    },
    "DialogueLine": {
      "additionalProperties": false,
      "properties": {
        "speaker": {
          "minLength": 1,
          "title": "Speaker",
          "type": "string"
        },
        "text": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "May contain {{gaps}}; null = learner writes it.",
          "title": "Text"
        },
        "cue": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language cue for a line the learner writes.",
          "title": "Cue"
        },
        "answer": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Model answer for a line the learner writes.",
          "title": "Answer"
        }
      },
      "required": [
        "speaker"
      ],
      "title": "DialogueLine",
      "type": "object"
    },
    "DialogueTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "dialogue",
          "title": "Kind",
          "type": "string"
        },
        "lines": {
          "items": {
            "$ref": "#/$defs/DialogueLine"
          },
          "minItems": 2,
          "title": "Lines",
          "type": "array"
        },
        "bank": {
          "default": false,
          "title": "Bank",
          "type": "boolean"
        },
        "distractors": {
          "description": "Extra word-bank words.",
          "items": {
            "type": "string"
          },
          "title": "Distractors",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "lines"
      ],
      "title": "DialogueTask",
      "type": "object"
    },
    "DrawTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "draw",
          "title": "Kind",
          "type": "string"
        },
        "prompt": {
          "minLength": 1,
          "title": "Prompt",
          "type": "string"
        },
        "labels": {
          "items": {
            "type": "string"
          },
          "title": "Labels",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "prompt"
      ],
      "title": "DrawTask",
      "type": "object"
    },
    "Fact": {
      "additionalProperties": false,
      "description": "A true, checkable fact shown as a 'Did you know?' sidebar.",
      "properties": {
        "id": {
          "anyOf": [
            {
              "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Id"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Title"
        },
        "text": {
          "minLength": 1,
          "title": "Text",
          "type": "string"
        },
        "source": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Short citation, e.g. 'ICO, 2023'.",
          "title": "Source"
        }
      },
      "required": [
        "text"
      ],
      "title": "Fact",
      "type": "object"
    },
    "GrammarPoint": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "name": {
          "minLength": 1,
          "title": "Name",
          "type": "string"
        },
        "explanation": {
          "description": "Source language, 1–3 sentences.",
          "minLength": 1,
          "title": "Explanation",
          "type": "string"
        },
        "rule": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Compact pattern, e.g. 'werden + Partizip II'.",
          "title": "Rule"
        },
        "table": {
          "anyOf": [
            {
              "$ref": "#/$defs/GrammarTable"
            },
            {
              "type": "null"
            }
          ],
          "default": null
        },
        "examples": {
          "items": {
            "type": "string"
          },
          "title": "Examples",
          "type": "array"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Scene"
        }
      },
      "required": [
        "id",
        "name",
        "explanation"
      ],
      "title": "GrammarPoint",
      "type": "object"
    },
    "GrammarTable": {
      "additionalProperties": false,
      "properties": {
        "head": {
          "items": {
            "type": "string"
          },
          "title": "Head",
          "type": "array"
        },
        "rows": {
          "items": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "minItems": 1,
          "title": "Rows",
          "type": "array"
        }
      },
      "required": [
        "rows"
      ],
      "title": "GrammarTable",
      "type": "object"
    },
    "Label": {
      "additionalProperties": false,
      "description": "A numbered object in a scene picture.",
      "properties": {
        "n": {
          "description": "Marker number printed on the picture.",
          "maximum": 30,
          "minimum": 1,
          "title": "N",
          "type": "integer"
        },
        "term": {
          "description": "Target-language answer, nouns with article.",
          "minLength": 1,
          "title": "Term",
          "type": "string"
        },
        "x": {
          "anyOf": [
            {
              "maximum": 1,
              "minimum": 0,
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Marker position, 0 = left edge, 1 = right edge of the picture.",
          "title": "X"
        },
        "y": {
          "anyOf": [
            {
              "maximum": 1,
              "minimum": 0,
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Marker position, 0 = top edge, 1 = bottom edge of the picture.",
          "title": "Y"
        }
      },
      "required": [
        "n",
        "term"
      ],
      "title": "Label",
      "type": "object"
    },
    "LabelTask": {
      "additionalProperties": false,
      "description": "Name the numbered objects in a scene picture (``scene`` is required).",
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "title": "Scene",
          "type": "string"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "label",
          "title": "Kind",
          "type": "string"
        },
        "bank": {
          "default": true,
          "description": "Show the terms as a word bank.",
          "title": "Bank",
          "type": "boolean"
        }
      },
      "required": [
        "id",
        "stage",
        "scene",
        "kind"
      ],
      "title": "LabelTask",
      "type": "object"
    },
    "MatchTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "match",
          "title": "Kind",
          "type": "string"
        },
        "pairs": {
          "items": {
            "$ref": "#/$defs/Pair"
          },
          "minItems": 2,
          "title": "Pairs",
          "type": "array"
        },
        "extra": {
          "description": "Distractors for the right column.",
          "items": {
            "type": "string"
          },
          "title": "Extra",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "pairs"
      ],
      "title": "MatchTask",
      "type": "object"
    },
    "MediaSearchTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "media_search",
          "title": "Kind",
          "type": "string"
        },
        "media": {
          "default": "video",
          "enum": [
            "video",
            "article",
            "podcast",
            "image"
          ],
          "title": "Media",
          "type": "string"
        },
        "queries": {
          "description": "Target-language search terms.",
          "items": {
            "type": "string"
          },
          "minItems": 1,
          "title": "Queries",
          "type": "array"
        },
        "questions": {
          "description": "What to find out or note.",
          "items": {
            "type": "string"
          },
          "minItems": 1,
          "title": "Questions",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "queries",
        "questions"
      ],
      "title": "MediaSearchTask",
      "type": "object"
    },
    "MultipleChoiceTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "multiple_choice",
          "title": "Kind",
          "type": "string"
        },
        "items": {
          "items": {
            "$ref": "#/$defs/ChoiceItem"
          },
          "minItems": 1,
          "title": "Items",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "items"
      ],
      "title": "MultipleChoiceTask",
      "type": "object"
    },
    "OrderEventsTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "order_events",
          "title": "Kind",
          "type": "string"
        },
        "events": {
          "description": "In the correct order; shown shuffled.",
          "items": {
            "type": "string"
          },
          "minItems": 3,
          "title": "Events",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "events"
      ],
      "title": "OrderEventsTask",
      "type": "object"
    },
    "Pair": {
      "additionalProperties": false,
      "properties": {
        "left": {
          "minLength": 1,
          "title": "Left",
          "type": "string"
        },
        "right": {
          "minLength": 1,
          "title": "Right",
          "type": "string"
        }
      },
      "required": [
        "left",
        "right"
      ],
      "title": "Pair",
      "type": "object"
    },
    "Picture": {
      "additionalProperties": false,
      "description": "The picture of a scene.\n\nProvide ``image`` (a local path or URL — e.g. the photo the story was\nbuilt from, or an open-access image), or ``svg`` (simple black line art\ndrawn by the LLM), or neither. ``prompt`` is an image-generation prompt\nfor later use; it is never printed on the learner's sheet.",
      "properties": {
        "image": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Image"
        },
        "svg": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "A complete <svg>…</svg> element.",
          "title": "Svg"
        },
        "credit": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Attribution the image licence requires.",
          "title": "Credit"
        },
        "caption": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Caption"
        },
        "prompt": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Image-generation prompt (not printed).",
          "title": "Prompt"
        },
        "labels": {
          "items": {
            "$ref": "#/$defs/Label"
          },
          "title": "Labels",
          "type": "array"
        },
        "numbers_in_image": {
          "default": false,
          "description": "True when the image itself already shows the marker numbers.",
          "title": "Numbers In Image",
          "type": "boolean"
        }
      },
      "title": "Picture",
      "type": "object"
    },
    "QuestionItem": {
      "additionalProperties": false,
      "properties": {
        "question": {
          "minLength": 1,
          "title": "Question",
          "type": "string"
        },
        "answer": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Model answer for the answer key.",
          "title": "Answer"
        },
        "lines": {
          "default": 2,
          "maximum": 20,
          "minimum": 0,
          "title": "Lines",
          "type": "integer"
        }
      },
      "required": [
        "question"
      ],
      "title": "QuestionItem",
      "type": "object"
    },
    "QuestionsTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "questions",
          "title": "Kind",
          "type": "string"
        },
        "items": {
          "items": {
            "$ref": "#/$defs/QuestionItem"
          },
          "minItems": 1,
          "title": "Items",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "items"
      ],
      "title": "QuestionsTask",
      "type": "object"
    },
    "Scene": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "heading": {
          "description": "Short target-language heading.",
          "minLength": 1,
          "title": "Heading",
          "type": "string"
        },
        "beat": {
          "anyOf": [
            {
              "enum": [
                "setup",
                "development",
                "complication",
                "climax",
                "resolution",
                "epilogue"
              ],
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Beat"
        },
        "text": {
          "description": "Target-language text; blank lines split paragraphs.",
          "minLength": 1,
          "title": "Text",
          "type": "string"
        },
        "translation": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language translation.",
          "title": "Translation"
        },
        "picture": {
          "anyOf": [
            {
              "$ref": "#/$defs/Picture"
            },
            {
              "type": "null"
            }
          ],
          "default": null
        }
      },
      "required": [
        "id",
        "heading",
        "text"
      ],
      "title": "Scene",
      "type": "object"
    },
    "Series": {
      "additionalProperties": false,
      "description": "Present when the worksheet is one episode of a continuing story.",
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "title": {
          "minLength": 1,
          "title": "Title",
          "type": "string"
        },
        "episode": {
          "minimum": 1,
          "title": "Episode",
          "type": "integer"
        },
        "previously": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "'Previously…' recap (episode ≥ 2).",
          "title": "Previously"
        },
        "next": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Teaser for the next episode.",
          "title": "Next"
        },
        "review": {
          "description": "Target words from earlier episodes to recycle.",
          "items": {
            "type": "string"
          },
          "title": "Review",
          "type": "array"
        }
      },
      "required": [
        "id",
        "title",
        "episode"
      ],
      "title": "Series",
      "type": "object"
    },
    "Story": {
      "additionalProperties": false,
      "properties": {
        "logline": {
          "description": "One source-language sentence: who wants what.",
          "minLength": 1,
          "title": "Logline",
          "type": "string"
        },
        "setting": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Setting"
        },
        "characters": {
          "items": {
            "$ref": "#/$defs/Character"
          },
          "title": "Characters",
          "type": "array"
        },
        "scenes": {
          "items": {
            "$ref": "#/$defs/Scene"
          },
          "minItems": 1,
          "title": "Scenes",
          "type": "array"
        }
      },
      "required": [
        "logline",
        "scenes"
      ],
      "title": "Story",
      "type": "object"
    },
    "TransformItem": {
      "additionalProperties": false,
      "properties": {
        "prompt": {
          "minLength": 1,
          "title": "Prompt",
          "type": "string"
        },
        "cue": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Cue"
        },
        "answer": {
          "minLength": 1,
          "title": "Answer",
          "type": "string"
        }
      },
      "required": [
        "prompt",
        "answer"
      ],
      "title": "TransformItem",
      "type": "object"
    },
    "TransformTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "transform",
          "title": "Kind",
          "type": "string"
        },
        "items": {
          "items": {
            "$ref": "#/$defs/TransformItem"
          },
          "minItems": 1,
          "title": "Items",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "items"
      ],
      "title": "TransformTask",
      "type": "object"
    },
    "TrueFalseItem": {
      "additionalProperties": false,
      "properties": {
        "statement": {
          "minLength": 1,
          "title": "Statement",
          "type": "string"
        },
        "answer": {
          "title": "Answer",
          "type": "boolean"
        },
        "correction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "The true version, for false statements.",
          "title": "Correction"
        }
      },
      "required": [
        "statement",
        "answer"
      ],
      "title": "TrueFalseItem",
      "type": "object"
    },
    "TrueFalseTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "true_false",
          "title": "Kind",
          "type": "string"
        },
        "items": {
          "items": {
            "$ref": "#/$defs/TrueFalseItem"
          },
          "minItems": 1,
          "title": "Items",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "items"
      ],
      "title": "TrueFalseTask",
      "type": "object"
    },
    "VocabItem": {
      "additionalProperties": false,
      "properties": {
        "term": {
          "description": "Target language; nouns with article.",
          "minLength": 1,
          "title": "Term",
          "type": "string"
        },
        "translation": {
          "minLength": 1,
          "title": "Translation",
          "type": "string"
        },
        "pos": {
          "default": "other",
          "title": "Pos",
          "type": "string"
        },
        "plural": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Plural"
        },
        "forms": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Irregular forms, e.g. 'wächst, wuchs, ist gewachsen'.",
          "title": "Forms"
        },
        "note": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Note"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Scene"
        }
      },
      "required": [
        "term",
        "translation"
      ],
      "title": "VocabItem",
      "type": "object"
    },
    "Vocabulary": {
      "additionalProperties": false,
      "properties": {
        "target": {
          "description": "The 6–15 key terms the tasks practise; each must also appear in items.",
          "items": {
            "type": "string"
          },
          "title": "Target",
          "type": "array"
        },
        "items": {
          "items": {
            "$ref": "#/$defs/VocabItem"
          },
          "minItems": 1,
          "title": "Items",
          "type": "array"
        }
      },
      "required": [
        "items"
      ],
      "title": "Vocabulary",
      "type": "object"
    },
    "WordBuildingItem": {
      "additionalProperties": false,
      "properties": {
        "parts": {
          "items": {
            "type": "string"
          },
          "minItems": 2,
          "title": "Parts",
          "type": "array"
        },
        "answer": {
          "minLength": 1,
          "title": "Answer",
          "type": "string"
        }
      },
      "required": [
        "parts",
        "answer"
      ],
      "title": "WordBuildingItem",
      "type": "object"
    },
    "WordBuildingTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "word_building",
          "title": "Kind",
          "type": "string"
        },
        "items": {
          "items": {
            "$ref": "#/$defs/WordBuildingItem"
          },
          "minItems": 1,
          "title": "Items",
          "type": "array"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "items"
      ],
      "title": "WordBuildingTask",
      "type": "object"
    },
    "WritingTask": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "pattern": "^[A-Za-z0-9][A-Za-z0-9_-]*$",
          "title": "Id",
          "type": "string"
        },
        "stage": {
          "enum": [
            "warm_up",
            "gist",
            "detail",
            "picture",
            "form",
            "practice",
            "production",
            "epilogue"
          ],
          "title": "Stage",
          "type": "string"
        },
        "scene": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Scene id(s) the task belongs to; the task follows the last one.",
          "title": "Scene"
        },
        "title": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language title tied to the story.",
          "title": "Title"
        },
        "instruction": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Source-language instruction.",
          "title": "Instruction"
        },
        "grammar": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Id of a grammar point shown beside it.",
          "title": "Grammar"
        },
        "kind": {
          "const": "writing",
          "title": "Kind",
          "type": "string"
        },
        "prompt": {
          "minLength": 1,
          "title": "Prompt",
          "type": "string"
        },
        "starter": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Starter"
        },
        "must_use": {
          "items": {
            "type": "string"
          },
          "title": "Must Use",
          "type": "array"
        },
        "min_words": {
          "anyOf": [
            {
              "minimum": 1,
              "type": "integer"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Min Words"
        },
        "max_words": {
          "anyOf": [
            {
              "minimum": 1,
              "type": "integer"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Max Words"
        },
        "lines": {
          "anyOf": [
            {
              "maximum": 40,
              "minimum": 1,
              "type": "integer"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Lines"
        },
        "model_answer": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "title": "Model Answer"
        }
      },
      "required": [
        "id",
        "stage",
        "kind",
        "prompt"
      ],
      "title": "WritingTask",
      "type": "object"
    }
  },
  "additionalProperties": false,
  "properties": {
    "schema": {
      "const": "langwich/3",
      "title": "Schema",
      "type": "string"
    },
    "title": {
      "description": "Target-language title.",
      "minLength": 1,
      "title": "Title",
      "type": "string"
    },
    "standfirst": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Source-language intro line.",
      "title": "Standfirst"
    },
    "source_lang": {
      "description": "The learner's language (ISO 639-1).",
      "pattern": "^[a-z]{2,3}(-[A-Za-z0-9]{2,8})?$",
      "title": "Source Lang",
      "type": "string"
    },
    "target_lang": {
      "description": "The language being learned.",
      "pattern": "^[a-z]{2,3}(-[A-Za-z0-9]{2,8})?$",
      "title": "Target Lang",
      "type": "string"
    },
    "cefr_level": {
      "enum": [
        "A1",
        "A2",
        "B1",
        "B2",
        "C1",
        "C2"
      ],
      "title": "Cefr Level",
      "type": "string"
    },
    "topic": {
      "minLength": 1,
      "title": "Topic",
      "type": "string"
    },
    "frame": {
      "anyOf": [
        {
          "enum": [
            "episode",
            "reportage",
            "case_study",
            "diary",
            "letters",
            "mystery",
            "dialogue",
            "other"
          ],
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "title": "Frame"
    },
    "series": {
      "anyOf": [
        {
          "$ref": "#/$defs/Series"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "story": {
      "$ref": "#/$defs/Story"
    },
    "facts": {
      "items": {
        "$ref": "#/$defs/Fact"
      },
      "title": "Facts",
      "type": "array"
    },
    "vocabulary": {
      "$ref": "#/$defs/Vocabulary"
    },
    "grammar": {
      "items": {
        "$ref": "#/$defs/GrammarPoint"
      },
      "title": "Grammar",
      "type": "array"
    },
    "tasks": {
      "items": {
        "discriminator": {
          "mapping": {
            "cloze": "#/$defs/ClozeTask",
            "dialogue": "#/$defs/DialogueTask",
            "draw": "#/$defs/DrawTask",
            "label": "#/$defs/LabelTask",
            "match": "#/$defs/MatchTask",
            "media_search": "#/$defs/MediaSearchTask",
            "multiple_choice": "#/$defs/MultipleChoiceTask",
            "order_events": "#/$defs/OrderEventsTask",
            "questions": "#/$defs/QuestionsTask",
            "transform": "#/$defs/TransformTask",
            "true_false": "#/$defs/TrueFalseTask",
            "word_building": "#/$defs/WordBuildingTask",
            "writing": "#/$defs/WritingTask"
          },
          "propertyName": "kind"
        },
        "oneOf": [
          {
            "$ref": "#/$defs/MatchTask"
          },
          {
            "$ref": "#/$defs/TrueFalseTask"
          },
          {
            "$ref": "#/$defs/MultipleChoiceTask"
          },
          {
            "$ref": "#/$defs/OrderEventsTask"
          },
          {
            "$ref": "#/$defs/QuestionsTask"
          },
          {
            "$ref": "#/$defs/ClozeTask"
          },
          {
            "$ref": "#/$defs/TransformTask"
          },
          {
            "$ref": "#/$defs/WordBuildingTask"
          },
          {
            "$ref": "#/$defs/LabelTask"
          },
          {
            "$ref": "#/$defs/WritingTask"
          },
          {
            "$ref": "#/$defs/DialogueTask"
          },
          {
            "$ref": "#/$defs/MediaSearchTask"
          },
          {
            "$ref": "#/$defs/DrawTask"
          }
        ]
      },
      "minItems": 1,
      "title": "Tasks",
      "type": "array"
    },
    "ui": {
      "additionalProperties": {
        "type": "string"
      },
      "description": "Overrides for page furniture strings (for languages without built-in labels).",
      "title": "Ui",
      "type": "object"
    }
  },
  "required": [
    "schema",
    "title",
    "source_lang",
    "target_lang",
    "cefr_level",
    "topic",
    "story",
    "vocabulary",
    "tasks"
  ],
  "title": "langwich worksheet (langwich/3)",
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://joernmht.github.io/langwich/schema/langwich-3.json"
}