Half-days forced every result into a 4h bucket. Days with hours split by
share give the same answer at finer granularity and drop a concept.
Session minutes are now stated as a floor on real work, not a measure:
the day's length comes from the calendar and only the split between
projects comes from the sessions. Meetings and review leave no
transcript, so a thin day is still a full day.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>