Captures the 6 deviations from the original design (each with driving
feedback + commit SHA), the 5 non-design polish commits, and the test
delta (42 → 47 passing). Keeps the design doc as the first-read for
understanding the feature while preserving decision history from the
Checkpoint-1 iteration.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
54080a3e0a