Improve error messages in api

**Description**
Currently hooks lacks proper serialization support.

**Proposed solution**
Add configurable serialization with sensible defaults.

**Priority**: Low/Medium

Start by locating the API hooks entry point and reviewing the current serialization behavior and error paths. The issue does not name files, tests, supported values, or default behavior, so clarify those expectations first; done means configurable hook serialization works with agreed sensible defaults and useful errors.

Written by the indexing model from the issue text.