Improve test coverage for $ARGUMENTS. Phase 1: Coverage Analysis 1. Generate coverage report 2. Identify untested functions, branches, error paths, edge cases Phase 2: Test Priority 3. Prioritise by: critical business logic, complex functions, error handling, public APIs Phase 3: Test Generation 4. Write tests covering edge cases, error conditions, and property-based tests where appropriate 5. Follow existing test patterns and conventions Phase 4: Test Quality 5. Ensure tests are independent, clearly named, test one thing, and run quickly Phase 5: Integration 6. Run full test suite, check cov…