{
  "contract_version": "gab_268_contract_v1",
  "gab_id": "GAB-268",
  "canonical_name": "ComprehensionLearningTrapDetector",
  "module_owner": "EdTechComprehensionLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "image_reading_id",
    "title",
    "summary",
    "callouts",
    "alt_text"
  ],
  "optional_fields": [
    "visual_type",
    "image_url",
    "subtitle",
    "instruction",
    "reason_title",
    "reason_text",
    "visual_type_variants",
    "primary_cta",
    "secondary_cta",
    "icon",
    "text_version"
  ],
  "field_types": {
    "callouts": "array<{num:integer,label:string,text:string}>",
    "visual_type": "enum['bar_chart','diagram_science','map_geography','artwork_literature']",
    "primary_cta": "object{label,action}",
    "secondary_cta": "object{label,action}",
    "visual_type_variants": "array<{key,title,summary,primary_cta_label}>"
  },
  "constraints": [
    "callouts doit contenir au moins 1 item avec num, label et text.",
    "alt_text obligatoire pour l'accessibilité (a11y) — jamais vide.",
    "image_url absent ou _TODO => rendu en mode fallback sans <img> (SVG ou placeholder).",
    "visual_type pilote titre/résumé/CTA si visual_type_variants fournis.",
    "primary_cta : libellé venant du JSON, jamais codé en dur dans le HTML."
  ],
  "blocked_conditions": [
    "callouts absent ou vide",
    "alt_text absent",
    "image_reading_id absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "alt_text obligatoire sur toute image",
    "prefers_reduced_motion",
    "callouts navigables au clavier"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "rendu complet, 0 erreur" },
    { "case": "callouts absent ou vide", "expected": "BLOCKED listant le champ manquant" },
    { "case": "alt_text absent", "expected": "BLOCKED listant le champ manquant" },
    { "case": "visual_type inconnu", "expected": "fallback sur titre/summary de l'instance directement" },
    { "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-268",
    "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). Canonical name ComprehensionLearningTrapDetector issu du workflow-industrialize.js — la source HTML nomme ComprehensionLearningImageReading."
  }
}