diff --git a/apps/web/src/lib/auth/auth-errors.ts b/apps/web/src/lib/auth/auth-errors.ts
index bfc143a..bf35974 100644
--- a/apps/web/src/lib/auth/auth-errors.ts
+++ b/apps/web/src/lib/auth/auth-errors.ts
@@ -45,15 +45,7 @@ const RETRYABLE_CODES: ReadonlySet<AuthErrorCode> = new Set<AuthErrorCode>([
 ]);
 
 /** Set of recognised error code strings for fast membership testing. */
-const KNOWN_CODES: ReadonlySet<string> = new Set<string>([
-  "access_denied",
-  "invalid_credentials",
-  "server_error",
-  "network_error",
-  "rate_limited",
-  "session_expired",
-  "unknown",
-]);
+const KNOWN_CODES: ReadonlySet<string> = new Set<string>(Object.keys(ERROR_MESSAGES));
 
 /**
  * Type-guard: checks whether a string value is a known {@link AuthErrorCode}.