diff --git a/.githooks/pre-commit b/.githooks/pre-commit
new file mode 100755
index 0000000..42d17b1
--- /dev/null
+++ b/.githooks/pre-commit
@@ -0,0 +1,81 @@
+#!/bin/sh
+
+RED='\033[0;31m'
+NC='\033[0m'
+
+detected=false
+
+check_file() {
+    while IFS=: read -r file score; do
+        [ -z "$file" ] && continue
+        detected=true
+    done <<EOF
+$(git diff --cached --name-only | while read -r f; do
+    [ ! -f "$f" ] && continue
+    case "$f" in
+        .env|.env.*)
+            [ "$f" = ".env.example" ] && continue
+            echo "$f|1"
+            ;;
+    esac
+    case "$(basename "$f")" in
+        .env|.env.*)
+            [ "$f" = ".env.example" ] && continue
+            echo "$f|1"
+            ;;
+    esac
+done)
+EOF
+}
+
+check_diff() {
+    content=$(git diff --cached --diff-filter=ACM -- "$@" 2>/dev/null)
+    [ -z "$content" ] && return
+
+    patterns='VITE_SUPABASE_SERVICE_ROLE_KEY|SUPABASE_SERVICE_ROLE|eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9|ghp_[0-9a-zA-Z]{36}|gho_[0-9a-zA-Z]{36}|sk_live_|sk_test_|AKIA[0-9A-Z]{16}|-----BEGIN[ A-Z]*PRIVATE KEY-----'
+
+    echo "$content" | while read -r line; do
+        case "$line" in
+            *VITE_SUPABASE_SERVICE_ROLE_KEY*)
+                printf "${RED}⛔ Secret détecté : VITE_SUPABASE_SERVICE_ROLE_KEY (clé admin Supabase)${NC}\n"
+                return 1
+                ;;
+            *eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9*)
+                printf "${RED}⛔ Secret détecté : JWT token (eyJ...) dans le diff${NC}\n"
+                return 1
+                ;;
+            *ghp_*|*gho_*)
+                printf "${RED}⛔ Secret détecté : GitHub token (ghp_/gho_)${NC}\n"
+                return 1
+                ;;
+            *sk_live_*|*sk_test_*)
+                printf "${RED}⛔ Secret détecté : clé Stripe${NC}\n"
+                return 1
+                ;;
+            *AKIA[0-9A-Z]*)
+                printf "${RED}⛔ Secret détecté : clé AWS (AKIA)${NC}\n"
+                return 1
+                ;;
+            *-----BEGIN*PRIVATE*KEY*-----*)
+                printf "${RED}⛔ Secret détecté : clé privée RSA/EC${NC}\n"
+                return 1
+                ;;
+        esac
+    done
+}
+
+check_file
+
+for f in $(git diff --cached --name-only); do
+    case "$f" in .githooks/*) continue ;; esac
+    check_diff "$f"
+    [ $? -eq 1 ] && detected=true
+done
+
+if [ "$detected" = true ]; then
+    printf "${RED}⛔ Commit bloqué : secret(s) détecté(s) dans les fichiers indexés.${NC}\n"
+    printf "  Vérifie le contenu et utilise 'git rm --cached' si nécessaire.\n"
+    exit 1
+fi
+
+exit 0