Shopify Conversions API Upgrade

I need our Shopify store feeding cleaner, more complete data back to Meta by moving the key pixel events—Purchases, Leads and Add to Cart—into the Conversions API and making sure they deduplicate properly against the browser pixel. The shop runs on standard Shopify with no other apps touching the pixel, so you will be working directly with the theme and Meta’s integrations.

Your job is to set up the server-side calls, confirm that each of those three events fires with the required parameters, and show they land in Events Manager’s Test Events panel with a strong “Event Match Quality.” I will consider the task finished when:

• Purchases, Leads and Add to Cart appear in Events Manager via both browser and CAPI with deduplication active.
• Payloads include key identifiers (email, phone, external_id, fbc, fbp, etc.) wherever Shopify makes them available.
• A short hand-off doc explains what you changed so I can maintain it.

If you have experience scripting Shopify themes or using Meta’s Conversion API Gateway, that will make the job go quickly.