- FixedAmount line item discounts in POS UI extensions API v2026-07 are now treated as per‑unit values, removing automatic total‑to‑per‑unit conversion.
- Apps must compute and pass the per‑unit discount themselves (e.g., divide total discount by quantity) when using setLineItemDiscount or bulkSetLineItemDiscounts.
- Percentage discounts are unchanged and apps on v2026-04 or earlier require no changes.
POS UI extensions 2026-07 uses per-unit fixed-amount line item discounts
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