You can now specify an optional custom message in .feed and .yun which will be posted along with an update

src/NadekoBot/Migrations/PostgreSql/20221122204423_feed-text.cs

@@ -0,0 +1,25 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace NadekoBot.Migrations.PostgreSql
+{
+    public partial class feedtext : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "message",
+                table: "feedsub",
+                type: "text",
+                nullable: true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "message",
+                table: "feedsub");
+        }
+    }
+}