diff --git a/backend/app/migrate.py b/backend/app/migrate.py
index 8006d3b..e5b2040 100644
--- a/backend/app/migrate.py
+++ b/backend/app/migrate.py
@@ -32,6 +32,11 @@ EXPECTED_COLUMNS: dict[str, list[tuple[str, str, str | None]]] = {
         ("identified_confidence", "REAL", None),
         ("identified_source", "TEXT", None),
     ],
+    "astuce": [
+        ("categorie", "TEXT", None),
+        ("tags", "TEXT", None),
+        ("mois", "TEXT", None),
+    ],
 }
 
 
diff --git a/backend/app/models/astuce.py b/backend/app/models/astuce.py
new file mode 100644
index 0000000..fc1e8bc
--- /dev/null
+++ b/backend/app/models/astuce.py
@@ -0,0 +1,19 @@
+from datetime import datetime, timezone
+from typing import Optional
+from sqlmodel import Field, SQLModel
+
+
+class Astuce(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    # Anciens champs conservés (colonnes existantes en DB)
+    entity_type: Optional[str] = None
+    entity_id: Optional[int] = None
+    source: Optional[str] = None
+    # Champs principaux
+    titre: str
+    contenu: str
+    # Nouveaux champs bibliothèque
+    categorie: Optional[str] = None   # "plante"|"jardin"|"tache"|"general"|"ravageur"|"maladie"
+    tags: Optional[str] = None        # JSON array string: '["tomate","semis"]'
+    mois: Optional[str] = None        # JSON array string: '[3,4,5]' ou null = toute l'année
+    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))