Short answer: Sidekick can do the Shopify-native half of this on its own — create a bundle as a real product listing and configure automatic discount rules that fire at checkout without a code. It cannot build a cart upsell popup or an in-checkout offer. Those cross into theme code and Shopify Plus checkout extensibility, so the honest workflow is: build bundles and discounts in chat, then let Sidekick help you pick and install an app for the popup layer.
Knowing that split up front saves you from the most common frustration — asking Sidekick to “add an upsell popup to my cart” and getting a plan instead of a popup.
What Sidekick builds directly
Two of the four moves in this guide run end to end inside the Shopify admin.
The bundle itself. You give Sidekick a bundle name and the component products, and it creates a bundle listing that groups them. Useful details worth specifying in your prompt:
- Pricing set so the saving versus buying individually is
[DISCOUNT PERCENTAGE]% - A combined description explaining why these items work together, in a
[casual/professional/luxurious]tone - A visible comparison of individual prices versus the bundle price
- A
[COLLECTION TAG]so the bundle lands in the right collection - Each component product’s inventory tracked separately
- Status set to
[active/draft]and assigned to the[SALES CHANNEL]you want
That last pair matters more than it looks. Creating bundles as draft first lets you review the pricing math before anything is live, and it’s the cheapest way to avoid a bad launch.
The discount logic. Separately from the listing, Sidekick can configure automatic discount rules — the kind that apply at checkout with no code typed in. Realistic rule shapes:
- Add
[PRODUCT A]and[PRODUCT B]together →$[DOLLAR DISCOUNT]off - Buy any
[QUANTITY]items from[COLLECTION NAME]→[PERCENTAGE]%off - Cart contains products tagged
[BUNDLE TAG]→ tiered discount at 2 / 3 / 4+ items
You can also tell it not to stack bundle discounts with other active promotions (except one explicitly allowed code), show the discount breakdown in the cart so the saving is visible, run the rules only between [START DATE] and [END DATE], exclude anything tagged [EXCLUSION TAG], and cap uses per customer.
Where the boundary is: cart popups
A popup that appears the moment someone adds to cart is not something Sidekick can create. It’s front-end behaviour — theme or app territory.
What Sidekick can genuinely help with is the decision and the install:
- Compare apps. Ask it to line up 2-3 App Store apps for add-to-cart upsell popups, with pricing tier and feature coverage: trigger rules, once-per-session frequency capping, mobile bottom-sheet versus modal display, and impression/click/dismissal analytics.
- Recommend one against your
[BUDGET]and your stated[PRIORITY]— cheapest plan, best mobile design, strictest frequency capping, whatever actually matters to you. - Initiate the install from the App Store.
- Hand you a configuration checklist — the popup rule (adding
[TRIGGER PRODUCT]offers[UPSELL PRODUCT 1]and[UPSELL PRODUCT 2]), the heading, brand colours, and a maximum number of products shown.
After that, you’re in the app’s dashboard, not the Shopify admin. Copy, capping, in-stock filtering, and reporting all live there.
Checkout upsells: what’s actually possible
This is the one most people get wrong. A true in-checkout upsell — offer shown before payment, one click to add it to the same order — needs Shopify Plus checkout extensibility. That’s outside what Sidekick can touch.
The workable alternative it can build is a post-checkout offer:
- A Shopify Flow that triggers within
[DELAY]of an order containing[MAIN_PRODUCT_CATEGORY] - An email with a
[DISCOUNT_PERCENTAGE]%off code for[COMPLEMENTARY_PRODUCT] - Email copy with a product image placeholder, a one-line benefit statement, price, code, and a link back to the store
- A report tracking how many of those codes actually get redeemed
It’s a second transaction rather than a bigger first one. Lower ceiling than a real checkout upsell — but it exists, it’s free, and it runs on data you already have.
A sane order of operations
If you’re building all four layers, sequence them by effort-to-payoff:
- Bundle listings — pure admin work, no ongoing cost, immediately visible on your storefront.
- Automatic discount rules — makes the bundle economics work without asking customers to remember a code.
- Post-checkout upsell flow — free, reuses your existing order data, and the redemption report tells you whether the offer is any good.
- Cart popup app — the only step with a recurring bill, so do it last, once you know which product pairs convert.
What to watch for
- Inventory drift. If component inventory isn’t tracked separately, a bundle can oversell one of its parts. Say it explicitly in the prompt.
- Stacking accidents. Bundle discounts plus a sitewide promo can quietly gut your margin. Set the non-stacking rule at creation time.
- Discount windows. Rules with no end date outlive the campaign. Always give
[START DATE]and[END DATE]. - App overlap. A cart popup app that also does bundling can conflict with the automatic discount rules you already built. Pick one source of truth for bundle pricing.
The bottom line
Sidekick is strong on the parts of upselling that are structured data: product listings, discount conditions, Flow triggers, and email copy. It’s not a front-end builder, and it can’t reach into checkout on a non-Plus store. Build the native layers first, prove the AOV lift, then spend money on an app for the popup you actually need.