The "ancient anchor" test expected three occurrences and omitted 31 August.
With a daily rule anchored at 09:00 and no stated end, the 31st runs to
09:00 on the 1st — inside a window that opens at midnight on the 1st. The
brief's own rule is that an occurrence overlapping either edge is included,
so four is right and three was the plan disagreeing with itself.
Found by the Task 4 implementer, which corrected the test and left the
implementation alone. Verified by running occurrencesOf directly.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
