SDD Progress

Task 1: complete (commits 4fc9271..5b95668, review clean) Task 2: complete (commits 5b95668..6c12d4b, review clean) Task 3: complete (commits 6c12d4b..95dce81, review clean) Task 4: complete (commits 95dce81..1a82a8b, review clean after fix) Task 5: complete (commits 1a82a8b..7086b8b, review clean after fix) Task 6: complete (commits 7086b8b..6341a6b, review clean)