{
  "contract_version": "gab_282_contract_v1",
  "gab_id": "GAB-282",
  "canonical_name": "WritingLearningSentenceBuilder",
  "module_owner": "EdTechWritingLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "sentence_builder_id",
    "sentence_goal",
    "sentence_slots",
    "success_criteria",
    "validation_policy"
  ],
  "optional_fields": [
    "title",
    "instruction",
    "explanation",
    "word_bank",
    "forbidden_patterns",
    "reason_why",
    "primary_cta",
    "secondary_cta",
    "accessibility",
    "child_safety"
  ],
  "field_types": {
    "sentence_goal": "string — identifiant du type de phrase cible (ex: 'phrase_complète_simple')",
    "sentence_slots": "array<{role:string, label:string, example:string, color_class:enum['subj','verb','compl','adv'], required:boolean}>",
    "word_bank": "array<{word:string, role:string}> — vocabulaire suggéré cliquable, role = slot de destination",
    "forbidden_patterns": "object{rule:string, min_slots_required:integer}",
    "primary_cta": "object{label:string, action:string, placeholder:string}",
    "secondary_cta": "object{label:string, action:string, reveal_text:string}"
  },
  "constraints": [
    "sentence_slots doit contenir au moins les rôles 'subj', 'verb', 'compl'.",
    "Le slot 'adv' (adverbe) est optionnel (required:false).",
    "word_bank est optionnel mais recommandé pour les élèves débutants.",
    "primary_cta.placeholder sert de placeholder dans le textarea de rédaction.",
    "secondary_cta.reveal_text est affiché tel quel lors du clic sur 'Voir les exemples'.",
    "forbidden_patterns.min_slots_required doit être >= 2."
  ],
  "blocked_conditions": [
    "sentence_slots absent ou vide",
    "sentence_goal absent",
    "sentence_builder_id absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "color_role_legend_visible"
  ],
  "qa_cases": [
    { "case": "instance conforme",           "expected": "rendu complet : légende couleurs, slots, word_bank, forbidden, CTAs" },
    { "case": "sentence_slots vide",         "expected": "BLOCKED listant le champ" },
    { "case": "sentence_goal absent",        "expected": "BLOCKED listant le champ" },
    { "case": "instance externe injectée",   "expected": "le rendu change sans modifier le HTML" },
    { "case": "word_bank absent",            "expected": "section word_bank masquée, rendu partiel toléré" },
    { "case": "responsive 375/768/1024",     "expected": "aucun débordement horizontal, slots wrappent correctement" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-282",
    "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)."
  }
}