Add ready made code to Shopify

I would like you to add a code which would work on Shopify product page. Here are the instructions.
This is a quick task.

Step 1 — Shopify admin → Online Store → Themes → find your live theme → click the ⋯ (three dots) → Edit code.
Step 2 — In the left sidebar, find the Sections folder. Click the Add a new section (or "+" / "Add a new template/asset" depending on theme) and create a file named:


ac-product-page.liquid
Step 3 — Open that new empty file, paste in the entire contents of ac-unit-product-page-customliquid.liquid, and save.
Step 4 — In the sidebar, open Templates → find product.json (or product..json if your AC unit uses a specific template).
Step 5 — In that JSON file, you'll see a "sections": { ... } object and an "order": [ ... ] list. Add an entry for your new section, e.g.:


json
"sections": {
"ac_product_page": {
"type": "ac-product-page"
}
}
and add "ac_product_page" into the "order" array wherever you want it to appear (e.g. near the top, after the main product section, or replacing it).
Step 6 — Save. Open the AC unit product on your storefront and check: variant buttons, price, images, installation fields, date picker, and Add to basket should all work and feed into the real cart/checkout.
If you'd rather avoid editing product.json by hand, the Custom Liquid block method from my earlier message is simpler (no JSON editing) — let me know if you'd prefer that route instead.



Diagnosed schema tag mismatch causing Liquid file validation error

Diagnosed schema tag mismatch causing Liquid file validation error

That's the bug — Shopify's section file validator scans for the literal text {% schema %} regardless of whether it's inside a comment, and since there's no matching {% endschema %}, it rejects the whole file as invalid.
Let me fix that line.
Edited a file, ran a command, read a file

Edited a file, ran a command, read a file

Found it: the comment at the top of the file mentioned {% schema %} in plain text (as part of an explanation), and Shopify's editor scans every section file for that literal string — finding it without a matching {% endschema %} made it reject the whole file as invalid.
I've removed that wording. Re-download the file above, replace the contents of ac-product-page.liquid with this new version, and save again — it should save cleanly now.