{
  "contract_version": "gab_393_contract_v1",
  "gab_id": "GAB-393",
  "canonical_name": "DataLearningGraphRead",
  "module_owner": "EdTechDataLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "graph_read_id",
    "graph_ref",
    "graph_type",
    "axis_definitions",
    "read_task"
  ],
  "optional_fields": [
    "title",
    "legend_items",
    "unit_notice",
    "scale_notice",
    "source_notice",
    "data_table_fallback",
    "fallback_text_summary"
  ],
  "constraints": [
    "Lire titre, axes, légende, unité et échelle avant interprétation.",
    "Ne pas accepter conclusion si axes/unités ignorés.",
    "Table fallback requise pour accessibilité si graphe central.",
    "Attention aux graphes tronqués ou axes non zéro.",
    "Valeur exacte et tendance doivent être distinguées."
  ],
  "blocked_conditions": [
    "graph_read_id absent (BLOCKED)",
    "graph_ref absent (BLOCKED)",
    "graph_type absent ou hors énum (BLOCKED)",
    "axis_definitions absent (x et y requis) (BLOCKED)",
    "read_task absent (BLOCKED)"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "fallback_text"
  ],
  "qa_cases": [
    {
      "case": "instance conforme",
      "expected": "rendu complet, données affichées, CTA actif"
    },
    {
      "case": "champ requis manquant",
      "expected": "BLOCKED listant le champ absent"
    },
    {
      "case": "instance externe via init(ext)",
      "expected": "le rendu change sans modifier le HTML (critère d'or)"
    },
    {
      "case": "responsive 375/768/1024",
      "expected": "aucun débordement horizontal"
    }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-393",
    "note": "Ce schema VALIDE l'instance. Le contrat pédagogique complet vit dans le CORE-GAB officiel."
  }
}