[QA] ✅ VERIFIED - All acceptance criteria met. Implementation is production-ready with 340/340 tests passing, 98% coverage on config/loader.py, comprehensive edge case testing, and no linting errors. Full report: /tmp/qa-PLOW-11.md

## Fix Applied: Linting Errors Resolved ### Problem QA found 9 unused imports across test files that caused `make lint` to fail: - `test_workflow_config.py`: Unused `typing.Any`, `yaml` - `test_workflow_v2.py`: Unused `yaml`, `DirectoryPolicy`, `ModelConfig`, `StepConfig`, `ToolProfile`, `WorkflowConfig`, `ConfigError` Additional issues in `test_parallel_validation.py`: - Missing `import time` (used in `time.perf_counter()`) - Missing `strict=True` on `zip()` call ### Changes Made 1. Ran `ruff check --fix` to auto-remove unused imports 2. Added `import time` to test_parallel_validation.py:13 3. Added `strict=True` to zip() at test_parallel_validation.py:676 ### Verification - All 340 tests pass - `make lint` now passes (both src/ and tests/) - Coverage remains at 98% for config/loader.py ### Commit 224ee5e - PLOW-11: Fix linting errors in test files

[QA] Code quality issue found - linting errors must be fixed ## QA Verdict: FAILED ⚠️ The implementation is **functionally complete** with excellent test coverage (98% for config/loader.py), but fails code quality checks due to unused imports. ### Issues Found Linting errors in new test files (9 total): - test_workflow_config.py: Unused imports 'typing.Any', 'yaml' - test_workflow_v2.py: Unused imports 'yaml', 'DirectoryPolicy', 'ModelConfig', 'StepConfig', 'ToolProfile', 'WorkflowConfig', 'ConfigError' ### Fix Required ```bash ruff check --fix tests/test_workflow_config.py tests/test_workflow_v2.py ``` ### What Works ✅ - All 340 tests passing - 98% coverage on config/loader.py - Comprehensive edge cases - All functional requirements met ### Blocking Issue ❌ - Must fix unused imports - Violates project standards Full report: /tmp/qa-PLOW-11.md

## Implementation Complete ### Files Added - `tests/test_workflow_config.py` (641 lines) - Config loading tests for YAML files - StepConfig validation tests - Selector resolution tests (QA/triage mapping) - Option building from config tests - Status routing tests - Reference resolution tests - `tests/test_workflow_v2.py` (537 lines) - ConfigDrivenWorkflowEngine initialization tests - Config integration tests - Status transition handling tests - Engine methods work correctly from parent class ### Test Results - **340 tests passing** (up from 273) - **config/loader.py coverage: 98%** (up from 91%) - **Overall coverage: 83%** (up from 82%) ### Verification All acceptance criteria met: - [x] All tests written and passing - [x] 90%+ code coverage for new config code (98% achieved) - [x] Edge cases covered (invalid YAML, missing files, unknown references) - [x] Existing tests still pass