diff --git a/lib/utils/session-id.ts b/lib/utils/session-id.ts
index 882def4e..ef722653 100644
--- a/lib/utils/session-id.ts
+++ b/lib/utils/session-id.ts
@@ -1,4 +1,9 @@
-export function baseSessionId(sessionId: string): string {
-  const slashIdx = sessionId.indexOf("/");
-  return slashIdx === -1 ? sessionId : sessionId.slice(0, slashIdx);
-}
+/**
+ * Extracts the base session ID by removing the part after the first slash.
+ * @param sessionId - The full session ID string.
+ * @returns The base session ID without the trailing part.
+ */
+export function baseSessionId(sessionId: string): string {
+  const slashIdx = sessionId.indexOf("/");
+  return slashIdx === -1 ? sessionId : sessionId.slice(0, slashIdx);
+}