{
  "contract_version": "gab_288_contract_v1",
  "gab_id": "GAB-288",
  "canonical_name": "WritingLearningRewriteImprove",
  "module_owner": "EdTechWritingLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "rewrite_id",
    "original_text_ref",
    "rewrite_goal",
    "improvement_criteria",
    "rewrite_policy"
  ],
  "optional_fields": [
    "title",
    "subtitle",
    "rewrite_goal_label",
    "before_after_view",
    "student_choice_required",
    "student_choice_buttons",
    "ai_assist_policy",
    "reason_block",
    "primary_cta",
    "secondary_cta",
    "source_metadata"
  ],
  "field_types": {
    "rewrite_id": "string — identifiant unique de l'exercice de réécriture",
    "original_text_ref": "string — texte original de l'élève à améliorer",
    "rewrite_goal": "string — objectif de la réécriture (ex: 'clarté + concision')",
    "improvement_criteria": "array<{tag:string, description:string}> — critères ciblés d'amélioration",
    "rewrite_policy": "object{label:string, rules:array<string>} — règles anti-ghostwriter",
    "before_after_view": "object{before_label,before_text_plain,before_strikethroughs,after_label,after_text_plain,after_insertions,suggestions_count}",
    "student_choice_required": "boolean — si true, l'élève doit valider chaque suggestion",
    "student_choice_buttons": "array<{label:string, action:string}> — boutons de choix élève",
    "ai_assist_policy": "enum['anti-ghostwriter','supervised','free'] — niveau de contrôle IA",
    "reason_block": "object{title:string, text:string} — explication pédagogique de l'approche",
    "primary_cta": "object{label:string, action:string, reveal_text:string}",
    "secondary_cta": "object{label:string, action:string, reveal_text:string}"
  },
  "constraints": [
    "improvement_criteria doit contenir au moins 1 entrée.",
    "rewrite_policy.rules doit contenir au moins 1 règle.",
    "student_choice_required:true implique la présence de student_choice_buttons.",
    "original_text_ref est le texte brut de l'élève — ne pas l'améliorer ou réécrire dans le contrat.",
    "ai_assist_policy : 'anti-ghostwriter' = maximum 30% du texte modifié par suggestion."
  ],
  "blocked_conditions": [
    "rewrite_id absent",
    "original_text_ref absent",
    "rewrite_goal absent",
    "improvement_criteria absent ou vide",
    "rewrite_policy absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "choice_buttons_aria_labeled"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, policy affichée, diff before/after visible, 0 erreur" },
    { "case": "champ requis manquant (ex: rewrite_goal)", "expected": "BLOCKED listant le champ" },
    { "case": "improvement_criteria vide ([])", "expected": "BLOCKED improvement_criteria vide" },
    { "case": "student_choice_required:true sans student_choice_buttons", "expected": "boutons de choix absents — dégradation affichée" },
    { "case": "instance externe injectée via init(ext)", "expected": "le rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-288",
    "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)."
  }
}