{
  "contract_version": "gab_031_contract_v1",
  "gab_id": "GAB-031",
  "canonical_name": "NextActionCTA",
  "module_owner": "EdTechPlayKit",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "next_action_id",
    "title",
    "primary_action",
    "alternatives"
  ],
  "optional_fields": [
    "renderer_key",
    "_note_dev"
  ],
  "field_types": {
    "gab_id": "string — valeur fixe 'GAB-031'",
    "next_action_id": "string — identifiant unique de l'instance CTA",
    "title": "string — titre affiché en tête de carte (ex: 'Et maintenant, on fait quoi ?')",
    "primary_action": "object{icon:string, label:string, action_title:string, action:string} — action principale recommandée",
    "alternatives": "array<{icon:string, label:string, action:string}> — 1 à N alternatives secondaires (non vides)"
  },
  "constraints": [
    "primary_action.action_title doit être présent — c'est le libellé structurel affiché.",
    "alternatives doit contenir au moins 1 élément.",
    "BLOCKED si title absent, primary_action absent, ou alternatives vide."
  ],
  "blocked_conditions": [
    "title absent",
    "primary_action absent ou primary_action.action_title absent",
    "alternatives vides"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "aria_live_feedback",
    "role_button_on_interactive_divs"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "carte rendue, action principale + alternatives affichées, 0 erreur" },
    { "case": "champ requis manquant (title)", "expected": "BLOCKED listant le champ absent" },
    { "case": "alternatives vides []", "expected": "BLOCKED 'alternatives vides'" },
    { "case": "clic action principale", "expected": "feedback '→ <action_title>' affiché" },
    { "case": "clic alternative", "expected": "feedback '→ <label>' 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, alternatives s'empilent sur mobile" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-031",
    "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)."
  }
}