Consider deprecating old hooks API

**Problem**
When working with routes, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

No files, tests, or entry points are named. Start by locating the route-handling code and its current error paths, then determine which messages lack useful detail; done means route errors provide clearer, more descriptive debugging information.

Written by the indexing model from the issue text.