Quick Reference

Field	Semantic
`event.data.previous_attributes`	ONLY the fields that changed; diff the current object against this
`event.data.previous_attributes.amount_refunded`	Previous cumulative refund total — subtract from `charge.amount_refunded` for per-event delta
`charge.amount_refunded`	CUMULATIVE across all refunds, NEVER per-event
`invoice.lines.has_more`	true -> embedded `data` is page 1; paginate with `starting_after`
`invoice.lines.data.at(-1).id`	The cursor for `starting_after` on the next page
`stripe.invoices.listLineItems(invoice.id, { starting_after })`	Resumes AFTER the cursor — does NOT re-scan page 1

When to Use This Skill

Use whenever:

You read an embedded .data[] array from a Stripe object and might need to paginate
You compute a "what changed" delta from a webhook event
You resolve a plan / SKU / entitlement from invoice line items or subscription items