diff --git a/src/auto-reply/reply/get-reply-inline-actions.ts b/src/auto-reply/reply/get-reply-inline-actions.ts
index e133585411a..c312e1144e4 100644
--- a/src/auto-reply/reply/get-reply-inline-actions.ts
+++ b/src/auto-reply/reply/get-reply-inline-actions.ts
@@ -30,8 +30,13 @@ import type { createModelSelectionState } from "./model-selection.js";
 import { extractInlineSimpleCommand } from "./reply-inline.js";
 import type { TypingController } from "./typing.js";
 
-const builtinSlashCommands = (() => {
-  return listReservedChatSlashCommandNames([
+let builtinSlashCommands: Set<string> | null = null;
+
+function getBuiltinSlashCommands(): Set<string> {
+  if (builtinSlashCommands) {
+    return builtinSlashCommands;
+  }
+  builtinSlashCommands = listReservedChatSlashCommandNames([
     "think",
     "verbose",
     "reasoning",
@@ -41,7 +46,8 @@ const builtinSlashCommands = (() => {
     "status",
     "queue",
   ]);
-})();
+  return builtinSlashCommands;
+}
 
 function resolveSlashCommandName(commandBodyNormalized: string): string | null {
   const trimmed = commandBodyNormalized.trim();
@@ -163,7 +169,7 @@ export async function handleInlineActions(params: {
     allowTextCommands &&
     slashCommandName !== null &&
     // `/skill …` needs the full skill command list.
-    (slashCommandName === "skill" || !builtinSlashCommands.has(slashCommandName));
+    (slashCommandName === "skill" || !getBuiltinSlashCommands().has(slashCommandName));
   const skillCommands =
     shouldLoadSkillCommands && params.skillCommands
       ? params.skillCommands