Adds 57 tests with 83% code coverage across all components: Test coverage by component: - RSS Fetcher (5 tests): fetch, retry, timeout, invalid XML - HTML Parser (8 tests): all sections, missing sections, full story - Rich Text Formatter (10 tests): facets, UTF-8, multi-byte chars - State Manager (12 tests): deduplication, rolling window, persistence - Config Manager (3 tests): YAML validation, env vars - Main Orchestrator (9 tests): E2E flow, error isolation, dry-run - E2E Tests (6 skipped): require live Coves API Test results: 57 passed, 6 skipped, 1 warning in 8.76s Fixtures: - Real Kagi News RSS item with all sections (sample_rss_item.xml) - Used to validate parser against actual feed structure All tests use pytest with mocking for HTTP requests (responses library).