diff --git a/ui/src/lib/company-routes.ts b/ui/src/lib/company-routes.ts
index 48d71ef2..0cd8c3a3 100644
--- a/ui/src/lib/company-routes.ts
+++ b/ui/src/lib/company-routes.ts
@@ -1,3 +1,11 @@
+// [nexus] Every path segment the router treats as a board route (rendered
+// under /:companyPrefix/*) must be listed here, otherwise
+// extractCompanyPrefixFromPath misclassifies it as a company prefix and
+// Link paths fail to get the prefix prepended. When a new board route is
+// added in App.tsx, add it here too. Missing this was the cause of the
+// Assistant link redirecting users to "/ASSISTANT" instead of
+// "/NEX/assistant" — Phase 33 (v1.5) and Phase 40+ (v1.7) introduced
+// routes without updating this set.
 const BOARD_ROUTE_ROOTS = new Set([
   "dashboard",
   "companies",
@@ -16,6 +24,15 @@ const BOARD_ROUTE_ROOTS = new Set([
   "activity",
   "inbox",
   "design-guide",
+  // v1.5 Nexus Personal Assistant
+  "assistant",
+  // v1.7 Content Generation
+  "content-studio",
+  "convert",
+  // Dev / internal tools also under the board scope
+  "plugins",
+  "tests",
+  "settings",
 ]);
 
 const GLOBAL_ROUTE_ROOTS = new Set(["auth", "invite", "board-claim", "cli-auth", "docs", "instance"]);