{
  "contract_version": "gab_422_contract_v1",
  "gab_id": "GAB-422",
  "canonical_name": "ExamLearningSubjectDecoder",
  "module_owner": "EdTechExamLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "subject_decoder_id",
    "subject_ref",
    "instruction_words",
    "student_reformulation",
    "decode_policy"
  ],
  "optional_fields": [
    "title",
    "document_refs",
    "trap_items",
    "expected_output",
    "time_hint",
    "bloom_level",
    "fallback_text_summary"
  ],
  "constraints": [
    "Voir Core GAB pour le contrat pédagogique complet."
  ],
  "blocked_conditions": [
    "subject_decoder_id absent (BLOCKED)",
    "subject_ref absent (BLOCKED)",
    "instruction_words absent ou vide (BLOCKED)",
    "student_reformulation absent (BLOCKED)",
    "decode_policy absent (BLOCKED)"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "fallback_text"
  ],
  "qa_cases": [
    {
      "case": "instance conforme",
      "expected": "rendu complet, interactions actives"
    },
    {
      "case": "champ requis manquant",
      "expected": "BLOCKED listant le champ"
    },
    {
      "case": "init(ext) externe",
      "expected": "rendu change sans modifier le HTML (critère d'or)"
    },
    {
      "case": "responsive 375/768/1024",
      "expected": "aucun débordement"
    }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-422",
    "note": "Contrat pédagogique complet dans le CORE-GAB officiel."
  }
}