## Investigation Complete This issue (TRCKR-524: E2E: Project list filter by tag) was already implemented and merged to master. ### What I Found: - Commit 8ae7580 (TRCKR-635) already added these tests - The test file tests/e2e/test_project_list_filter_tag.py contains 16 comprehensive tests ### Test Coverage: 1. Single tag filter 2. Different tag filter 3. Multiple tags filter (OR logic) 4. Filter clears when unchecked 5. Filter badge display 6. Filter badge removal 7. Clear filters button appears 8. Clear filters removes all 9. URL parameter filtering 10. Combined with search 11. Filter icon active state 12. Combined with status filter 13. Sort order preservation 14. Empty results handling 15. Project count updates 16. Tags displayed in table ### Verification: - Branch TRCKR-524 already contains commit 8ae7580 - Test file identical to master (no differences) - No additional changes needed Note: Tests skip locally without Docker. They require testcontainers.