add unit tests #11
Description
Several important modules such as coding_agent.py, llm.py, and self_improve_step.py do not currently have dedicated unit test coverage. Adding tests would improve reliability and make future refactoring safer.
Functionality validation for each major class/function
Edge case handling (e.g., invalid inputs, tool failures)
Integration with llm_withtools.py if applicable
I’d be happy to help add these tests using pytest.