{
  "schema_version": "1.0.0",
  "description": "CSV transport contract that normalizes to submission-schema.json. One metadata row and one or more item rows constitute a submission.",
  "files": {
    "metadata": {
      "required_columns": [
        "schema_version",
        "submission_id",
        "case_id",
        "sample_id",
        "sample_version",
        "packet_id",
        "packet_hash",
        "prompt_id",
        "prompt_hash",
        "source_language",
        "code_revision",
        "run_id",
        "provider",
        "model",
        "model_version",
        "completed_at",
        "language_capabilities",
        "settings"
      ],
      "row_count": 1
    },
    "items": {
      "required_columns": [
        "item_id",
        "task_layer",
        "case_id",
        "document_id",
        "sentence_id",
        "span_ids",
        "source_language",
        "sentence_source_text",
        "sentence_gloss_en",
        "lexical_units",
        "source_risk_flags",
        "identification",
        "cmt",
        "interpretation",
        "confidence",
        "uncertainty",
        "rival_reading",
        "case_fields"
      ],
      "minimum_rows": 1
    }
  },
  "encoding": {
    "charset": "UTF-8",
    "delimiter": ",",
    "line_ending": "LF",
    "null": "",
    "json_columns": [
      "language_capabilities",
      "settings",
      "span_ids",
      "lexical_units",
      "source_risk_flags",
      "identification",
      "cmt",
      "interpretation",
      "uncertainty",
      "case_fields"
    ],
    "rules": [
      "JSON columns contain compact valid JSON, not delimiter-joined pseudo-lists.",
      "Blank optional object columns normalize to an absent property, not an empty string.",
      "Source-language text and optional English glosses always occupy distinct columns.",
      "All normalized values must satisfy submission-schema.json."
    ]
  }
}