gh-yaleh-meta-cc-claude/skills/code-refactoring/examples/iteration-2-walkthrough.md

Iteration 2 Walkthrough

1. Baseline tests — Added 5 characterization tests for calculateSequenceTimeSpan; coverage lifted from 85% → 100%.
2. Extract collectOccurrenceTimestamps — Removed timestamp gathering loop (complexity 10 → 6) while maintaining green tests.
3. Extract findMinMaxTimestamps — Split min/max computation; additional unit tests locked behaviour (complexity 6 → 3).
4. Quality outcome — Complexity −70%, package coverage 92% → 94%, three commits (≤50 lines) all green.