{
  "contract_version": "gab_284_contract_v1",
  "gab_id": "GAB-284",
  "canonical_name": "WritingLearningIntroConclusionBuilder",
  "module_owner": "EdTechWritingLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "intro_conclusion_id",
    "writing_context",
    "section_type",
    "sections",
    "success_criteria"
  ],
  "optional_fields": [
    "title",
    "subtitle",
    "opening_policy",
    "forbidden_patterns",
    "reason_block",
    "primary_cta",
    "secondary_cta",
    "use_when",
    "do_not_use_when",
    "source_metadata"
  ],
  "field_types": {
    "section_type": "enum['intro_conclusion_dual','intro_only','conclusion_only']",
    "sections": "object{intro:SectionDef, conclusion:SectionDef} — SectionDef={label,parts_heading,parts:array<{number,title,body,starter}>}",
    "success_criteria": "array<string> — critères d'acceptation de l'exercice",
    "forbidden_patterns": "array<string> — patterns interdits à détecter",
    "opening_policy": "object{heading,text}",
    "reason_block": "object{heading,text}",
    "primary_cta": "object{label,action,placeholder?}",
    "secondary_cta": "object{label,action,reveal_text?}"
  },
  "constraints": [
    "sections doit contenir au moins une clé (intro ou conclusion) avec un tableau parts non vide.",
    "Chaque part doit avoir : number (entier), title (string), body (string). starter est recommandé.",
    "success_criteria : tableau non vide.",
    "section_type doit correspondre aux clés présentes dans sections.",
    "primary_cta : bouton structurel (HTML), libellé venant du JSON."
  ],
  "blocked_conditions": [
    "sections absent ou vide",
    "intro_conclusion_id absent",
    "success_criteria absent ou vide"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "aria-label sur les boutons de switch",
    "textarea avec placeholder descriptif"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, switch intro/conclusion fonctionnel, 0 erreur" },
    { "case": "champ requis manquant (sections absent)", "expected": "BLOCKED listant le champ manquant" },
    { "case": "switch intro → conclusion", "expected": "les 3 parts, le heading et les starters changent sans rechargement" },
    { "case": "instance externe injectée", "expected": "le rendu change sans modifier le HTML" },
    { "case": "forbidden_patterns absent", "expected": "bloc forbidden masqué ou vide proprement" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-284",
    "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)."
  }
}