{
  "contract_version": "gab_177_contract_v1",
  "gab_id": "GAB-177",
  "canonical_name": "LevelTestQuestionAdaptive",
  "module_owner": "EdTechLevelTest",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "question_id",
    "question_text",
    "choices",
    "feedback_correct",
    "feedback_incorrect",
    "cta_next_label"
  ],
  "optional_fields": [
    "title",
    "progress_current",
    "progress_total",
    "level",
    "level_label",
    "branch_header",
    "next_level_if_correct",
    "next_level_label_correct",
    "next_level_if_incorrect",
    "next_level_label_incorrect"
  ],
  "field_types": {
    "question_id": "string — identifiant unique de la question",
    "question_text": "string — texte HTML léger (b autorisé) de la question posée",
    "choices": "array<{letter:string, text:string, correct:boolean}> — 2 à 6 choix, exactement 1 correct:true",
    "progress_current": "integer >= 1",
    "progress_total": "integer >= progress_current",
    "level": "enum['easy','mid','hard'] — niveau initial de la question",
    "level_label": "string — libellé affiché du niveau (étoiles + libellé court)",
    "feedback_correct": "string HTML — message branche si bonne réponse",
    "feedback_incorrect": "string HTML — message branche si mauvaise réponse",
    "next_level_if_correct": "enum['easy','mid','hard']",
    "next_level_label_correct": "string",
    "next_level_if_incorrect": "enum['easy','mid','hard']",
    "next_level_label_incorrect": "string",
    "cta_next_label": "string — libellé du bouton Continuer"
  },
  "constraints": [
    "choices : exactement 1 entrée avec correct:true (jamais 0, jamais 2+).",
    "choices : minimum 2, maximum 6 entrées.",
    "next_level_if_correct != next_level_if_incorrect (branche réellement adaptative).",
    "feedback_correct et feedback_incorrect doivent être différents (branche différenciée).",
    "HTML dans question_text et feedbacks : seuls les tags <b> et <em> sont tolérés."
  ],
  "blocked_conditions": [
    "question_text absent ou vide",
    "choices absent, vide ou sans aucun correct:true",
    "feedback_correct absent",
    "feedback_incorrect absent",
    "cta_next_label absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "aria_labels_on_choices"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, QCM cliquable, branche visible après sélection" },
    { "case": "champ requis manquant (question_text)", "expected": "BLOCKED listé proprement" },
    { "case": "choices sans correct:true", "expected": "BLOCKED listé" },
    { "case": "bonne réponse sélectionnée", "expected": "branche feedback_correct affichée, niveau bascule vers next_level_if_correct" },
    { "case": "mauvaise réponse sélectionnée", "expected": "branche feedback_incorrect affichée, bonne réponse révélée, niveau bascule vers next_level_if_incorrect" },
    { "case": "instance externe injectée via init()", "expected": "rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-177",
    "note": "Ce schema VALIDE l'instance. Le contrat pédagogique complet (scoring adaptatif, IRT, seuils niveau) vit dans le CORE-GAB officiel, pas ici (évite la duplication)."
  }
}