Support caching configuration

**Problem**
When working with models, 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 no files, tests, or entry points, and its title about caching conflicts with the body about model error messages. Start by clarifying which problem is intended and locating the relevant model-related error handling in the terminal agent. Done should be a specific reproducible case with defined expected error details.

Written by the indexing model from the issue text.