Consider deprecating old hooks API

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

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

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

The issue names parsers, error handling, and an old hooks API but provides no files, tests, or entry points. Start by locating the parser error paths and hooks API references, then clarify whether the goal is deprecation, more descriptive messages, or both; done requires an agreed scope and corresponding tests.

Written by the indexing model from the issue text.