Thanks for your reply Jonathan. Ideally we'd like to target CartLines rather than productVariants because different lines of the same product variant might get a different discount amount depending on personalization selected. I believe I was on 2024...

We're building a custom product discount extension with Shopify Functions. We've got some of the functionality working, but have noticed an unexpected outcome when the same product variant exists across multiple lines. We're developing with the .js v...