check-coveragelisted

# Check Coverage ## Steps ### 1. Run `make test-cov-check` If tests pass and coverage >= 80%, done. ### 2. If tests fail - **Existing tests broke**: fix production code, not tests. - **New tests fail**: fix the test. - **Ambiguous**: read test intent. If behavior intentionally changed, update test and document in commit message. ### 3. If coverage below 80% Check "Missing" column. Prioritize: 1. New code you just wrote (must have tests). 2. Critical paths (error handling, validation, CLI logic). 3. Utility functions with clear contracts. Do NOT: add trivial tests just to raise numbers, add `# pragma: no cover` without justification, or test third-party/Streamlit internals. ### 4. Write tests Add to `tests/test_<module>.py`. Use `project_layout` fixture when needed. One behavior per test function. ### 5. Re-run `make test-cov-check` Repeat until threshold met. ### 6. HTML report (optional) `make test-cov` -- opens `htmlcov/index.html`. ## Failure handling - Missing `pytest-cov`: run `uv sync --dev`. - Uncoverable lines (platform-specific, external calls): add `# pragma: no cover` with reason, note in commit message.