suaveplan/openspec/archive/2026-05-02-datetime-spec-conformance/tasks.md

Tasks: datetime-spec-conformance

1. Source refactors (additive only)

• 1.1 Add expandRecurrenceSize, businessDaysBetweenDuration, businessDaysBetweenSize histograms in src/otel/datetime-otel.ts.
• 1.2 Extend recordExpandRecurrence(durationMs, size?) and recordBusinessDaysBetween(count, durationMs?) additively.
• 1.3 Wire size + duration recording in src/recurrence/recurrence.ts::expandRecurrence and src/business-days/business-days.ts::businessDaysBetween.
• 1.4 Re-export the new histograms from src/index.ts.
• 1.5 Update src/otel/datetime-otel.md to document the new instruments.

2. Spec annotations

• 2.1 Add a **Verified by:** line under every requirement in openspec/specs/datetime/spec.md.
• 2.2 Clear the retroactive-ticking marker phrase in openspec/archive/2026-04-19-enterprise-datetime/tasks.md.

3. Pinning tests

• 3.1 Add src/datetime.spec-conformance.test.ts covering DT-01..DT-10 (20 tests).

4. Verify

• 4.1 bunx turbo lint typecheck test --filter=@suaveplan/datetime green.
• 4.2 bunx turbo test:coverage --filter=@suaveplan/datetime 100/100/100/100.
• 4.3 bun scripts/openspec-conformance.ts @suaveplan/datetime exits 0.