JST Trigger and Target Algorithm

For scheduled selection, convert UTC runtime to JST and gate execution on fixed slots.

Trigger Decision

• JST offset: +9h
• Allowed hours: 0, 6, 12, 18
• Allowed minute: 0

shouldTrigger = isScheduledJstHour && (jstMinute === 0)

Day Window Helper

Build JST day boundaries for daily counting:

• dayStart: YYYY-MM-DD 00:00:00
• dayEndExclusive: next day 00:00:00

Use this to count videos created "today" in JST.

Soft Target Balancing

Define soft per-format targets (for example 4 each) and compute remaining targets with non-negative clamps:

remaining = max(0, target - actual)

This gives scheduling context to selection prompts without hard blocking generation.