{
  "contract_version": "gab_237_contract_v1",
  "gab_id": "GAB-237",
  "canonical_name": "FeedbackLearningHintBeforeAnswer",
  "module_owner": "EdTechFeedbackLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "hint_instance_id",
    "hints",
    "hint_level",
    "primary_cta"
  ],
  "optional_fields": [
    "title",
    "subtitle",
    "instruction_default",
    "exam_mode",
    "exam_banner",
    "secondary_cta",
    "accessibility",
    "child_safety"
  ],
  "field_types": {
    "hint_level": "enum['light','medium','strong','last_before_answer'] — niveau affiché au chargement",
    "hints": "object{light,medium,strong,last_before_answer} — chaque clé contient {text:string(html-safe),instruction:string,retry_cta:string}",
    "exam_mode": "boolean — si true, GAB-237 désactivé automatiquement (aucun hint affiché)",
    "primary_cta": "object{label:string,action:string}",
    "secondary_cta": "object{label:string,action:string}"
  },
  "constraints": [
    "hints doit contenir les 4 clés light/medium/strong/last_before_answer.",
    "hint_level doit être l'une des 4 valeurs de l'enum.",
    "exam_mode:true désactive l'affichage de tous les hints et de l'escalade.",
    "last_before_answer peut révéler la réponse complète ; les 3 autres niveaux ne doivent pas la donner directement.",
    "No-reward-write : ce gabarit ne déclenche jamais de XP/coins/badges.",
    "primary_cta.label vient du JSON — jamais hardcodé dans le HTML."
  ],
  "blocked_conditions": [
    "hints absent ou vide",
    "hint_level absent",
    "primary_cta absent",
    "gab_id absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "aria_labels sur les boutons d'escalade"
  ],
  "qa_cases": [
    { "case": "instance conforme (exam_mode:false)", "expected": "escalade 4 niveaux cliquable, hint du niveau actif affiché, CTAs actifs" },
    { "case": "exam_mode:true", "expected": "banner exam visible, escalade masquée, hints masqués, CTAs désactivés" },
    { "case": "champ requis manquant (hints absent)", "expected": "BLOCKED listant le champ" },
    { "case": "clic niveau light", "expected": "dot 1 actif (vert mint), hint light affiché, retry_cta light affiché" },
    { "case": "clic niveau last_before_answer", "expected": "dot 4 actif (dégradé coral→magenta), hint complet affiché" },
    { "case": "instance externe injectée via ENGINE.init(ext)", "expected": "le rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal, escalade lisible" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-237",
    "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)."
  }
}