diff --git a/Migrations/2026_03_24_000000_add_feature_code_foreign_keys.php b/Migrations/2026_03_24_000000_add_feature_code_foreign_keys.php
new file mode 100644
index 0000000..9680b1b
--- /dev/null
+++ b/Migrations/2026_03_24_000000_add_feature_code_foreign_keys.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Add foreign key constraints on feature_code columns to prevent orphaned records.
+     *
+     * Fixes #12: feature_code in usage_alert_history not constrained to entitlement_features.
+     */
+    public function up(): void
+    {
+        Schema::table('entitlement_usage_alert_history', function (Blueprint $table) {
+            $table->foreign('feature_code', 'usage_alert_feature_code_fk')
+                ->references('code')
+                ->on('entitlement_features')
+                ->cascadeOnUpdate()
+                ->restrictOnDelete();
+        });
+
+        Schema::table('entitlement_boosts', function (Blueprint $table) {
+            $table->foreign('feature_code', 'boosts_feature_code_fk')
+                ->references('code')
+                ->on('entitlement_features')
+                ->cascadeOnUpdate()
+                ->restrictOnDelete();
+        });
+
+        Schema::table('entitlement_usage_records', function (Blueprint $table) {
+            $table->foreign('feature_code', 'usage_records_feature_code_fk')
+                ->references('code')
+                ->on('entitlement_features')
+                ->cascadeOnUpdate()
+                ->restrictOnDelete();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('entitlement_usage_alert_history', function (Blueprint $table) {
+            $table->dropForeign('usage_alert_feature_code_fk');
+        });
+
+        Schema::table('entitlement_boosts', function (Blueprint $table) {
+            $table->dropForeign('boosts_feature_code_fk');
+        });
+
+        Schema::table('entitlement_usage_records', function (Blueprint $table) {
+            $table->dropForeign('usage_records_feature_code_fk');
+        });
+    }
+};