{
  "contract_version": "gab_289_contract_v1",
  "gab_id": "GAB-289",
  "canonical_name": "WritingLearningToneAndRegister",
  "module_owner": "EdTechWritingLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "tone_register_id",
    "text_ref",
    "target_audience",
    "expected_register",
    "register_criteria"
  ],
  "optional_fields": [
    "title",
    "subtitle",
    "register_options",
    "bad_fit_examples",
    "rewrite_suggestions",
    "preserve_voice_policy",
    "reason_why",
    "primary_cta",
    "secondary_cta",
    "use_when",
    "do_not_use_when"
  ],
  "field_types": {
    "expected_register": "enum['familier','courant','soutenu','tres_soutenu']",
    "register_options": "array<string> — libellés d'affichage de la barre de registre",
    "bad_fit_examples": "array<{original:string, tag:string}> — exemples d'écarts de registre détectés",
    "rewrite_suggestions": "array<{from:string, to:string}> — reformulations proposées",
    "primary_cta": "object{label,reveal} — bouton principal + texte révélé au clic",
    "secondary_cta": "object{label,reveal} — bouton secondaire + texte révélé au clic"
  },
  "constraints": [
    "expected_register doit correspondre à l'un des register_options affichés.",
    "bad_fit_examples et rewrite_suggestions doivent être parallèles en longueur si les deux présents.",
    "preserve_voice_policy : jamais remplacé par un message générique — doit être extrait de la source ou _TODO.",
    "primary_cta.label vient du JSON ; le bouton HTML est structurel."
  ],
  "blocked_conditions": [
    "tone_register_id absent (BLOCKED)",
    "target_audience absent (BLOCKED)",
    "expected_register absent (BLOCKED)",
    "register_criteria absent (BLOCKED)"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "aria_labels_on_register_bar"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, 0 erreur JS, barre de registre active sur expected_register" },
    { "case": "champ requis manquant (ex: expected_register)", "expected": "BLOCKED listant le champ" },
    { "case": "bad_fit_examples vide ou absent", "expected": "section écarts masquée ou absente, pas d'erreur" },
    { "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, barre de registre lisible" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-289",
    "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)."
  }
}