{
  "contract_version": "gab_263_contract_v1",
  "gab_id": "GAB-263",
  "canonical_name": "ComprehensionLearningKeyIdeas",
  "module_owner": "EdTechComprehensionLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "key_ideas_id",
    "title",
    "items",
    "primary_cta"
  ],
  "optional_fields": [
    "subtitle",
    "extraction_mode",
    "rationale",
    "secondary_cta",
    "source_passage"
  ],
  "field_types": {
    "items": "array<{rank:integer,level:enum['main','secondary','detail'],level_label:string,level_tag:string,text:string}>",
    "extraction_mode": "enum['ranked','mindmap','tldr','tags']",
    "primary_cta": "object{label,action}",
    "secondary_cta": "object{label,action}",
    "rationale": "string"
  },
  "constraints": [
    "items doit contenir au moins 1 élément avec level='main'.",
    "rank doit être un entier positif unique par item.",
    "primary_cta : bouton structurel (HTML), libellé venant du JSON.",
    "extraction_mode : défaut 'ranked' si absent.",
    "level : uniquement 'main', 'secondary' ou 'detail'."
  ],
  "blocked_conditions": [
    "items absent ou tableau vide",
    "title absent",
    "primary_cta absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "fallback_text"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, 0 erreur, hiérarchie visible" },
    { "case": "items vide ou absent", "expected": "BLOCKED listant le champ manquant" },
    { "case": "title absent", "expected": "BLOCKED listant le champ manquant" },
    { "case": "primary_cta absent", "expected": "BLOCKED listant le champ manquant" },
    { "case": "instance externe injectée", "expected": "le rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-263",
    "note": "Ce schema VALIDE l'instance. Le contrat pédagogique complet (input_contract/validation_logic/feedback_scoring_logic) vit dans le CORE-GAB officiel, pas ici (évite la duplication)."
  }
}