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cold_display_guard/findings.md
2026-04-27 10:59:29 +08:00

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# Findings
## Existing Local Context
- `~/Code/video_recognition_local/store_dwell_alert` exists, but it tracks people dwell time, not food batch dwell time.
- The new project should be independent and should not share git history with the existing project.
## Domain Model
- The reliable business unit is a display-zone batch, not an individual food item.
- A batch starts when a zone changes from empty to occupied.
- A batch continues while the zone remains occupied, even if the item count decreases.
- A batch ends when the zone becomes empty.
- If a batch is removed after the maximum dwell threshold, the system expects a trash-bin deposit event within a configurable window.
- If a removed over-threshold batch reappears in any display zone before being discarded, that is a violation.
- If food is added while a zone is already occupied, that is a mixed-batch violation.