{
  "contract_version": "gab_025_contract_v1",
  "gab_id": "GAB-025",
  "canonical_name": "GenericEmbedBlock",
  "module_owner": "EdTechPlayKit",
  "renderer_key": "text_cta",
  "required_fields": [
    "gab_id",
    "embed_id",
    "title",
    "embed_label",
    "fallback_text"
  ],
  "optional_fields": [
    "embed_src",
    "embed_type",
    "embed_label_hide",
    "placeholder_icon",
    "placeholder_title",
    "placeholder_hint"
  ],
  "field_types": {
    "embed_src": "string (URL iframe) — peut contenir _TODO si URL non connue au design time",
    "embed_type": "enum['map','simulator','widget','quiz','other']",
    "embed_label": "string — libellé du bouton de chargement",
    "embed_label_hide": "string — libellé du bouton de masquage",
    "fallback_text": "string — affiché si embed bloqué ou refusé"
  },
  "constraints": [
    "L'embed ne se charge jamais automatiquement : l'élève doit cliquer (consentement explicite).",
    "fallback_text obligatoire : contenu critique ne doit pas rester vide si embed indisponible.",
    "embed_src peut être absent au design time (TODO) — le renderer affiche uniquement le placeholder dans ce cas.",
    "Aucune URL externe ne doit être hardcodée dans le HTML : elle vient exclusivement de l'instance."
  ],
  "blocked_conditions": [
    "embed_id absent",
    "title absent",
    "fallback_text absent"
  ],
  "accessibility": [
    "keyboard_navigable",
    "focus_visible",
    "prefers_reduced_motion",
    "fallback_text toujours visible"
  ],
  "qa_cases": [
    { "case": "instance conforme", "expected": "placeholder affiché, bouton actif, fallback visible" },
    { "case": "clic bouton Charger", "expected": "état loaded, libellé bascule vers embed_label_hide" },
    { "case": "re-clic Masquer", "expected": "retour état placeholder, libellé embed_label" },
    { "case": "champ requis manquant", "expected": "BLOCKED listant le champ" },
    { "case": "instance externe injectée", "expected": "le rendu change sans modifier le HTML" },
    { "case": "responsive 375/768/1024", "expected": "aucun débordement horizontal" }
  ],
  "traceability": {
    "derived_from_core_gab": "GAB-025",
    "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)."
  }
}