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Simulate All Active Discount Combinations (`Order + Product + Shipping` Stacking) Against SKU COGS to Block Deal-Forum Margin Wipeouts

Q: Why does "Simulate All Active Discount Combinations (`Order + Product + Shipping` Stacking) Against SKU COGS to Block Deal-Forum Margin Wipeouts" happen (Spec #C0922 · Shopify Discounts · Klaviyo Coupons · Adobe Commerce)?

Prevents $12,000+ error risk across Shopify Discounts · Klaviyo Coupons · Adobe Commerce / Magento · Honey / Capital One Shopping (.csv / .json / .xlsx). Drop active discounts .csv/.json + S

Q: How does HeyCheck C0922 :: .csv / .json / .xlsx · Shopify Discounts · Klaviyo Coupons · Adob fix "Simulate All Active Discount Combinations (`Order + Product + Shipping` Stacking) Against SKU COGS to Block Deal-Forum Margin Wipeouts" deterministically?

Drop active discounts .csv/.json + SKU COGS .csv -> Get worst-case stacked-price & negative-margin alert .xlsx — Maintained by @edi_gs1 (Retail EDI, Marketplaces & Storefront Desk).

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Failure Prevented: Recovers lost mobile checkout conversion & Google rankings without breaking active cart/payment apps (+ instant rollback diff).

1. Copy theme.liquid: In Shopify Admin go to Online Store -> Themes -> (...) -> Edit code -> layout/theme.liquid.

2. Drop Into Surgeon: Scan for orphaned {% render %} / <script> tags from uninstalled apps & >200ms main-thread blockers.

3. Inspect Flamechart X-Ray: See exact ms saved (e.g. 340ms -> 118ms INP) before paying.

Drop Shopify theme.liquid or Theme Script Manifest (.liquid, .html, .json, .zip)

Drop anywhere on screen or tap to choose file · Instant X-Ray in RAM (no registration)

Pre-Pay Deterministic X-Ray · 3 Structural Defects Caught SHA-256: — · Confidence: 99.4%

Verified Ready Package: Pruned Clone Theme Archive + Main-Thread Yield Patch + Visual Diff Proof (.zip)

Done! Where to upload / apply your fixed file (30s):

1. Duplicate Theme First (1 Click): In Shopify click Duplicate on your live theme as a best-practice backup.

2. Paste Cleaned theme.liquid: Replace layout/theme.liquid with your verified output and preview cart/checkout.

3. Publish & Verify CWV: Enjoy snappy mobile taps and green Core Web Vitals INP <= 200ms.

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