{
  "contract_version": "gab_283_contract_v1",
  "gab_id": "GAB-283",
  "canonical_name": "WritingLearningParagraphBuilder",
  "module_owner": "EdTechWritingLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "paragraph_builder_id",
    "paragraph_goal",
    "paragraph_slots",
    "coherence_rules",
    "completion_rules"
  ],
  "optional_fields": [
    "title",
    "subtitle",
    "primary_cta",
    "rubric_ref",
    "use_when",
    "do_not_use_when"
  ],
  "field_types": {
    "paragraph_goal": "string — type de paragraphe cible (ex: 'paragraphe_argumentatif')",
    "paragraph_slots": "array<{slot_id:enum['topic','evidence','analysis','transition'], label:string, content:string, starter:string}>",
    "coherence_rules": "string — règle de fil rouge reliant les 4 slots",
    "completion_rules": "object{min_slots:number, max_slots:number, rationale:string}",
    "primary_cta": "object{label:string, action:string, placeholder:string}",
    "rubric_ref": "string — critères d'évaluation du paragraphe"
  },
  "constraints": [
    "paragraph_slots doit contenir exactement 4 objets dans l'ordre : topic, evidence, analysis, transition.",
    "completion_rules.min_slots et max_slots doivent être égaux à 4 pour un paragraphe standard.",
    "primary_cta.label vient du JSON ; le bouton est structurel dans le HTML.",
    "coherence_rules est une string pédagogique expliquant le fil rouge entre slots."
  ],
  "blocked_conditions": [
    "paragraph_slots absent ou vide",
    "paragraph_goal absent",
    "paragraph_builder_id absent",
    "coherence_rules absent",
    "completion_rules absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "fallback_text"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, 4 slots affichés, 0 erreur" },
    { "case": "paragraph_slots absent", "expected": "BLOCKED listant le champ" },
    { "case": "paragraph_goal absent", "expected": "BLOCKED listant le champ" },
    { "case": "instance externe injectée via init(ext)", "expected": "le rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal" },
    { "case": "clic CTA primaire", "expected": "textarea ouverte avec placeholder du JSON" },
    { "case": "clic CTA secondaire", "expected": "rubric_ref affiché dans un panneau" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-283",
    "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)."
  }
}