{
  "contract_version": "gab_251_contract_v1",
  "gab_id": "GAB-251",
  "canonical_name": "CollaborationLearningIntro",
  "module_owner": "EdTechCollaborationLearning",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "collab_intro_id",
    "title",
    "subtitle",
    "collaboration_type",
    "roles",
    "primary_cta"
  ],
  "optional_fields": [
    "roles_heading",
    "estimated_duration",
    "secondary_cta",
    "collab_types"
  ],
  "field_types": {
    "collab_intro_id": "string — identifiant unique de l'instance (ex: ci-revision-duo)",
    "collaboration_type": "enum['student_student','revision_duo','parent_child','student_teacher','small_group','oral_duo']",
    "roles": "array<{step:number,label:string,instruction:string}> — 3 rôles/étapes requis",
    "primary_cta": "object{label:string,action:string}",
    "secondary_cta": "object{label:string,action:string}",
    "estimated_duration": "string — ex: '6 min'",
    "collab_types": "object<collaboration_type → {title,subtitle,roles,estimated_duration,primary_cta}> — variantes switchables"
  },
  "constraints": [
    "roles doit contenir exactement 3 entrées (steps 1, 2, 3).",
    "collaboration_type doit correspondre à l'une des 6 valeurs de l'enum strict.",
    "primary_cta.label et secondary_cta.label sont affichés tels quels — pas d'invention.",
    "Si collab_types présent, le moteur peut switcher dynamiquement selon collaboration_type sans rebuild."
  ],
  "blocked_conditions": [
    "title absent",
    "roles vide ou absent",
    "primary_cta absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "rôles lisibles sans couleur (step number)"
  ],
  "qa_cases": [
    { "case": "instance conforme revision_duo", "expected": "rendu complet, titre/rôles/CTA affichés correctement" },
    { "case": "champ requis manquant (title)", "expected": "BLOCKED listant le champ" },
    { "case": "champ requis manquant (roles)", "expected": "BLOCKED listant le champ" },
    { "case": "champ requis manquant (primary_cta)", "expected": "BLOCKED listant le champ" },
    { "case": "instance externe injectée (student_teacher)", "expected": "le rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal, rôles lisibles" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-251",
    "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). Les 6 valeurs CI_TYPES extraites de la source INDEX-300-collaborationlearning-GAB-251-255-PLAYABLE.html."
  }
}