Shopify is introducing Canvas, a design workspace where merchants build their online stores with its Sidekick AI agent. The October 1 announcement says the feature will roll out over the coming days, bringing a store's pages into one visual surface for direct editing and conversational changes.
The central idea is to make the whole store visible while work happens on individual details. Merchants can pan across pages to compare the overall design, then zoom into an element without losing that broader context.
A preview of the actual theme
Shopify says Canvas renders the real code behind the store rather than displaying a static mockup. Each page can be previewed with full interactivity and animation. Key pages can also be viewed with different products, collections, and screen sizes.
Merchants can click an element to edit it directly or ask Sidekick for changes in chat. As the agent works, its changes appear in Canvas in real time. That lets a merchant judge how a local adjustment fits other pages instead of reviewing isolated images of a proposed design.
The preview is part of the editing workflow: it supplies a result to inspect and revise. An interactive render does not by itself establish that every shopping path, accessibility requirement, or business rule has been checked.
Sidekick combines conversation with code review
The announcement describes Sidekick asking questions, proposing approaches, and carrying earlier design decisions into later changes. Both merchant and agent work from the same design, with the merchant reviewing updates as they appear and Sidekick taking screenshots to inspect its own work.
Shopify's design director Austin Knight says the team invested in guiding the agent's design decisions, not just its ability to write code. His account describes a design contract, curated patterns, and evaluation data for each theme. These are intended to shape the suggestions a merchant receives while leaving room for feedback and refinement.
A merchant can start with a general impression of how the store should feel or a detailed mockup. Canvas provides something concrete to react to, allowing the conversation to move from an abstract request to changes visible across the store.
Editing across theme files
Shopify says Sidekick made more than twenty-five million theme edits in the first half of 2026. That figure is the company's reported usage history, not a measurement of Canvas adoption.
For larger store-building tasks, Sidekick now works directly on theme files using instructions and skills for building stores. Shopify also says it simplified theme architecture to make structure, logic, and design easier for the agent to understand and modify.
The agent validates code and reviews screenshots in a loop before returning the result to the merchant. The described scope ranges from a small section change to a store-wide redesign. Code feedback and visual feedback address different kinds of mistakes, so both are part of the stated process.
An early rollout, not an editor replacement
Ben Sehl, Shopify's director of product and a Kotn co-founder, gives a twenty-minute custom-store example when explaining the launch. That illustrates the product's intended convenience; it is not a promised completion time for every catalog or design.
Sehl also explicitly says Canvas is early, has gaps still to close, and is not replacing the existing editor yet. Merchants should therefore distinguish the workspace being introduced from a fully completed migration of all store-editing tasks. The announcement's concrete change is a shared visual surface for inspecting and directing an agent's theme work, with rollout and further iteration still underway.