{
  "contract_version": "gab_261_contract_v1",
  "gab_id": "GAB-261",
  "canonical_name": "ComprehensionLearningIntro",
  "module_owner": "EdTechComprehensionLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "intro_id",
    "title",
    "subtitle",
    "levels",
    "comprehension_level"
  ],
  "optional_fields": [
    "icon",
    "estimated_duration",
    "subject",
    "reason_title",
    "reason_body",
    "secondary_cta"
  ],
  "field_types": {
    "levels": "array<{key,icon,name,description,title,subtitle,estimated_duration,steps_heading,steps:string[],primary_cta:{label,action}}>",
    "comprehension_level": "enum['literal','inferential','critical'] — niveau actif par défaut",
    "secondary_cta": "object{label,action}"
  },
  "constraints": [
    "levels doit contenir exactement 3 entrées : literal, inferential, critical.",
    "Chaque level doit avoir un primary_cta avec label et action.",
    "steps doit contenir exactement 4 entrées par level.",
    "comprehension_level doit correspondre à une clé key existante dans levels."
  ],
  "blocked_conditions": [
    "levels absent ou vide",
    "intro_id absent",
    "title absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "aria_selected_on_level_buttons"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, niveau literal actif par défaut, 0 erreur" },
    { "case": "champ requis manquant (levels)", "expected": "BLOCKED listant le champ" },
    { "case": "champ requis manquant (title)", "expected": "BLOCKED listant le champ" },
    { "case": "clic niveau inferential", "expected": "titre, sous-titre, durée et CTA se mettent à jour depuis levels[inferential]" },
    { "case": "instance externe injectée via init(ext)", "expected": "le rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal, boutons de niveaux lisibles" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-261",
    "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)."
  }
}