- Short answer
- Yes — in the theme editor, or in Canvas on a theme built or duplicated there; a change takes effect once you save it (editor) or publish it (Canvas).
- Nothing without approval
- Sidekick presents options for you to review and approve; it makes no store change without your approval.
- Connected ChatGPT or Claude
- Can't edit your live theme; Shopify's route: duplicate it, let the tool edit the copy, publish the copy yourself.
- Documented theme limit
- Sidekick can't make edits to images within a store theme or your product list.
- Published theme in Canvas
- Early access; on your published theme a change is saved, but customers see it only after Update, then Publish changes.
- No published-theme ban found
- No Shopify page we read on October 10, 2026 states that Sidekick cannot edit a published theme.
- Plan and role
- Theme editor: none named on pages we read on October 10, 2026. Canvas needs the Edit code permission.
What's New Since Publication: Updated since publication · 1 change
- Shopify added Canvas as a second place where Sidekick edits themesShopify's Sidekick help page now says Sidekick changes a theme only in the theme editor or in Canvas, an early-access editor, and the Canvas pages document the published-theme case: a change is saved, and customers see it only after you click Update, then Publish changes. The theme editor list also grew, and Shopify's AI-powered tools page no longer uses the Shopify Magic name.
Which theme does Sidekick actually change?
Shopify's condition is a place, not a theme: Sidekick changes a theme only when you're in the theme editor or in Canvas. Its documented scope in the theme editor is changes to themes.
Suggest and apply changes to themes, including on themes that aren't currently published. You must save these changes for them to take effect.
Nothing is applied until you approve it. Shopify says Sidekick only presents options for you to review and approve.
In Canvas, Shopify documents the published case. Once a theme you built or duplicated in Canvas is published, a change there is saved, but customers "continue to view your store as it was" until you click Update, then Publish changes. Canvas is early access for certain stores, and a theme edited there gets no theme updates — see our Canvas guide.
For the theme editor, no Shopify page we read on October 10, 2026 states that Sidekick cannot edit a published theme — that covers the Sidekick help and set-up pages, the theme editor references, and the two connected-tool pages, which write that limit for connected AI tools, not for Sidekick.
What can Sidekick change inside a Shopify theme?
The documented list starts with settings: all global theme settings and the settings of sections and blocks, from text and colors to on-off switches. In the theme editor Sidekick can also add sections and blocks your theme already includes, turn installed app embeds on or off, and move, remove, or hide sections and blocks.
One documented limit sits beside that list on the set-up page: Sidekick can't make edits to images within a store theme or your product list.
No page we read on October 10, 2026 names a plan or staff role required for Sidekick's theme-editor work — that covers the Sidekick help and set-up pages. Canvas does: your staff need the Edit code permission to open it.
Is Sidekick different from a connected ChatGPT or Claude?
Yes. For connected tools a live-theme limit is written down: Shopify's ChatGPT plugin page says a connected AI tool "can change a theme that isn't published, but it can't edit your live theme, publish a theme, or delete one", and the Claude connector page repeats it word for word.
Using a connected ChatGPT or Claude? Shopify documents one route for design changes — duplicate your theme, let the tool edit the copy, publish the copy yourself. Whether you need a connector as well as Sidekick is a separate question.
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