diff --git a/scripts/eas_cache.py b/scripts/eas_cache.py
new file mode 100644
index 0000000..0cf7ab4
--- /dev/null
+++ b/scripts/eas_cache.py
@@ -0,0 +1,289 @@
+#!/usr/bin/env python3
+"""
+eas_cache.py — Cache manager for EAS local builds stored on RustFS/S3
+
+Reproduit le système de cache d'Expo cloud pour les builds locaux :
+  1. restore : télécharge le cache Gradle depuis S3 et l'extrait dans ~/.gradle
+  2. save    : compresse ~/.gradle et l'upload dans S3
+
+Clé de cache = sha256(package-lock.json + app.json) → premier appel exact,
+               sha256(package-lock.json)              → fallback si app.json change
+
+Usage:
+  python scripts/eas_cache.py restore --app mobile
+  python scripts/eas_cache.py save    --app mobile
+
+Variables d'environnement requises:
+  AWS_ACCESS_KEY_ID
+  AWS_SECRET_ACCESS_KEY
+  S3_ENDPOINT     ex: https://s3.uber-stup.club
+  S3_BUCKET       ex: build-cache  (défaut: build-cache)
+"""
+
+import argparse
+import hashlib
+import os
+import sys
+import tarfile
+import time
+from pathlib import Path
+
+# ── Dirs à cacher ──────────────────────────────────────────────────────────────
+CACHE_DIRS = [
+    Path.home() / ".gradle" / "caches" / "modules-2",     # dépendances Maven/Gradle
+    Path.home() / ".gradle" / "caches" / "transforms-3",  # artefacts transformés
+    Path.home() / ".gradle" / "wrapper" / "dists",        # distribution Gradle
+]
+
+# Fichiers utilisés pour calculer la clé de cache par app
+HASH_FILES = {
+    "omnex-plateform-client": ["omnex-plateform-client/package-lock.json", "omnex-plateform-client/app.json"],
+    "omnex-plateform-app": ["omnex-plateform-app/package-lock.json", "omnex-plateform-app/app.json"],
+}
+
+
+# ── Clé de cache ───────────────────────────────────────────────────────────────
+
+def compute_key(app: str, repo_root: Path, full: bool = True) -> str:
+    """Calcule la clé de cache (sha256 tronqué à 16 chars)."""
+    files = HASH_FILES[app]
+    if not full:
+        files = files[:1]   # fallback : seulement package-lock.json
+
+    h = hashlib.sha256()
+    for rel in files:
+        path = repo_root / rel
+        if path.exists():
+            h.update(path.read_bytes())
+        else:
+            h.update(rel.encode())  # fichier absent → on hash le nom pour différencier
+    return h.hexdigest()[:16]
+
+
+def s3_key(app: str, cache_key: str) -> str:
+    return f"gradle-cache/{app}/{cache_key}.tar.gz"
+
+BUCKET_DEFAULT = "apk-builds"
+
+
+# ── Helpers S3 ─────────────────────────────────────────────────────────────────
+
+def _boto3_client():
+    try:
+        import boto3
+        from botocore.config import Config
+        import urllib3
+        urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
+    except ImportError:
+        print("❌  boto3 non installé — lance : pip install boto3")
+        sys.exit(1)
+
+    endpoint = os.environ.get("S3_ENDPOINT", "").rstrip("/")
+    if not endpoint:
+        print("❌  Variable S3_ENDPOINT manquante")
+        sys.exit(1)
+
+    return boto3.client(
+        "s3",
+        endpoint_url=endpoint,
+        aws_access_key_id=os.environ["AWS_ACCESS_KEY_ID"],
+        aws_secret_access_key=os.environ["AWS_SECRET_ACCESS_KEY"],
+        region_name=os.environ.get("AWS_DEFAULT_REGION", "us-east-1"),
+        config=Config(
+            s3={"addressing_style": "path"},
+            signature_version="s3v4",
+        ),
+        verify=False,
+    )
+
+
+def ensure_bucket(s3, bucket: str):
+    """Crée le bucket s'il n'existe pas."""
+    try:
+        s3.head_bucket(Bucket=bucket)
+    except Exception:
+        try:
+            s3.create_bucket(Bucket=bucket)
+            print(f"🪣  Bucket '{bucket}' créé")
+        except Exception as e:
+            print(f"❌  Impossible de créer le bucket '{bucket}': {e}")
+            sys.exit(1)
+
+
+class _Progress:
+    """Affiche la progression upload/download en MB."""
+
+    def __init__(self, total: int, label: str):
+        self.total = total
+        self.done = 0
+        self.label = label
+        self.start = time.time()
+
+    def __call__(self, chunk: int):
+        self.done += chunk
+        pct = self.done * 100 // self.total if self.total else 0
+        mb_done = self.done / 1_048_576
+        mb_total = self.total / 1_048_576
+        elapsed = time.time() - self.start
+        speed = (self.done / elapsed / 1_048_576) if elapsed > 0 else 0
+        print(
+            f"\r  {self.label}  {mb_done:.1f}/{mb_total:.1f} MB  {pct}%  {speed:.1f} MB/s",
+            end="",
+            flush=True,
+        )
+        if self.done >= self.total:
+            print()
+
+
+def object_exists(s3, bucket: str, key: str) -> bool:
+    try:
+        s3.head_object(Bucket=bucket, Key=key)
+        return True
+    except Exception:
+        return False
+
+
+def object_size(s3, bucket: str, key: str) -> int:
+    try:
+        resp = s3.head_object(Bucket=bucket, Key=key)
+        return resp["ContentLength"]
+    except Exception:
+        return 0
+
+
+# ── Commande restore ───────────────────────────────────────────────────────────
+
+def restore(app: str, repo_root: Path, bucket: str):
+    s3 = _boto3_client()
+    ensure_bucket(s3, bucket)
+
+    full_key = compute_key(app, repo_root, full=True)
+    fallback_key = compute_key(app, repo_root, full=False)
+
+    hit_key = None
+    for label, ck in [("exact", full_key), ("fallback", fallback_key)]:
+        obj = s3_key(app, ck)
+        if object_exists(s3, bucket, obj):
+            print(f"✅  Cache {label} trouvé  →  {obj}")
+            hit_key = ck
+            break
+
+    if hit_key is None:
+        print("ℹ️   Aucun cache trouvé (premier build ou clé inconnue)")
+        return
+
+    obj = s3_key(app, hit_key)
+    size = object_size(s3, bucket, obj)
+    progress = _Progress(size, "⬇️  download")
+
+    import tempfile
+    with tempfile.TemporaryFile() as tmp:
+        s3.download_fileobj(bucket, obj, tmp, Callback=progress)
+        tmp.seek(0)
+        print("📦  Extraction du cache…")
+        with tarfile.open(fileobj=tmp, mode="r:gz") as tf:
+            tf.extractall(path=Path.home())
+
+    print(f"✅  Cache restauré ({size / 1_048_576:.1f} MB)")
+
+
+# ── Commande save ──────────────────────────────────────────────────────────────
+
+def save(app: str, repo_root: Path, bucket: str):
+    s3 = _boto3_client()
+    ensure_bucket(s3, bucket)
+    cache_key = compute_key(app, repo_root, full=True)
+    obj = s3_key(app, cache_key)
+
+    # Pas besoin de re-uploader si la clé existe déjà
+    if object_exists(s3, bucket, obj):
+        print(f"ℹ️   Cache déjà présent pour cette clé ({cache_key}), skip upload")
+        return
+
+    dirs_to_cache = [d for d in CACHE_DIRS if d.exists()]
+    if not dirs_to_cache:
+        print("⚠️   Aucun répertoire Gradle à cacher (~/.gradle introuvable)")
+        return
+
+    print(f"📦  Compression de {len(dirs_to_cache)} répertoires…")
+    for d in dirs_to_cache:
+        print(f"    {d}")
+
+    import io
+    buf = io.BytesIO()
+    with tarfile.open(fileobj=buf, mode="w:gz", compresslevel=6) as tf:
+        for d in dirs_to_cache:
+            # Chemin relatif depuis home pour restaurer au bon endroit
+            arcname = str(d.relative_to(Path.home()))
+            tf.add(d, arcname=arcname)
+
+    size = buf.tell()
+    buf.seek(0)
+
+    print(f"⬆️  Upload  {obj}  ({size / 1_048_576:.1f} MB)…")
+    progress = _Progress(size, "⬆️  upload ")
+    s3.upload_fileobj(buf, bucket, obj, Callback=progress)
+
+    print(f"✅  Cache sauvegardé ({cache_key})")
+
+
+# ── Commande clean (optionnel) ─────────────────────────────────────────────────
+
+def clean(app: str, bucket: str, keep: int):
+    """Supprime les anciennes entrées de cache (garde les `keep` plus récentes)."""
+    s3 = _boto3_client()
+    prefix = f"gradle-cache/{app}/"
+    resp = s3.list_objects_v2(Bucket=bucket, Prefix=prefix)
+    objs = sorted(
+        resp.get("Contents", []),
+        key=lambda o: o["LastModified"],
+        reverse=True,
+    )
+    to_delete = objs[keep:]
+    if not to_delete:
+        print(f"ℹ️   Rien à supprimer (≤ {keep} entrées)")
+        return
+    s3.delete_objects(
+        Bucket=bucket,
+        Delete={"Objects": [{"Key": o["Key"]} for o in to_delete]},
+    )
+    print(f"🗑   {len(to_delete)} ancienne(s) entrée(s) supprimée(s)")
+
+
+# ── CLI ────────────────────────────────────────────────────────────────────────
+
+def main():
+    parser = argparse.ArgumentParser(description="EAS build cache manager — RustFS/S3")
+    parser.add_argument("command", choices=["restore", "save", "clean"])
+    parser.add_argument("--app", required=True, choices=list(HASH_FILES.keys()))
+    parser.add_argument(
+        "--bucket",
+        default=os.environ.get("S3_BUCKET", "apk-builds"),
+        help="Nom du bucket S3 (défaut: apk-builds)",
+    )
+    parser.add_argument(
+        "--repo-root",
+        default=os.environ.get("GITHUB_WORKSPACE", "."),
+        help="Racine du repo (défaut: GITHUB_WORKSPACE ou répertoire courant)",
+    )
+    parser.add_argument(
+        "--keep",
+        type=int,
+        default=5,
+        help="[clean] Nombre d'entrées à conserver par app (défaut: 5)",
+    )
+    args = parser.parse_args()
+
+    repo_root = Path(args.repo_root).resolve()
+    print(f"🔧  eas_cache  |  app={args.app}  commande={args.command}  bucket={args.bucket}")
+
+    if args.command == "restore":
+        restore(args.app, repo_root, args.bucket)
+    elif args.command == "save":
+        save(args.app, repo_root, args.bucket)
+    elif args.command == "clean":
+        clean(args.app, args.bucket, args.keep)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/scripts/requirements.txt b/scripts/requirements.txt
new file mode 100644
index 0000000..011ba23
--- /dev/null
+++ b/scripts/requirements.txt
@@ -0,0 +1 @@
+boto3>=1.34.0
diff --git a/scripts/t.md b/scripts/t.md
new file mode 100644
index 0000000..ada54f0
--- /dev/null
+++ b/scripts/t.md
@@ -0,0 +1,17 @@
+```mermaid
+graph TD
+    A[Client ajoute au panier] -->|Décrémente stock| B[Stock -= quantité]
+    B --> C[Ajout au panier]
+    C -->|❌ Si échec| D[Stock déjà décrémenté!]
+
+    E[Client supprime du panier] -->|Transaction DB| F[Stock += quantité]
+    F --> G[Suppression du panier]
+
+    H[Client valide commande] --> I[Panier vidé]
+    I -->|Sans restaurer stock| J[Commande créée]
+
+    K[Client annule commande] -->|Transaction DB| L[Stock += quantité]
+    L --> M[Commande annulée]
+
+    N[Paiement crypto échoue] -->|Transaction DB| O[Stock += quantité]
+```