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Lace lets you reason about your product in real time through chat. When something needs to change, the review canvas captures a snapshot of what’s on screen so you can comment on it, discuss it, and act on it.

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Starting a review

Tap Review on the floating pill to switch from Chat into Review mode. Lace captures a screenshot of your active window and opens it in the canvas alongside your chat. Every capture persists as a page, accessible from the Reviews tab and from the chat where it was created. Click anywhere on the canvas to place a pin at that position. If Lace’s element detection finds a UI element at that location, the pin anchors to it. Click an existing pin to select its comment. The pin layer is hidden by default — use the comment icon button in the canvas toolbar to show or hide all pins.

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Commenting

A comment is the durable unit of review feedback — what you authored about a screen, carried across captures. From a selected element (or empty space, for a region comment) you can:
  • Comment with a headline describing what’s wrong, plus an optional body describing what to do instead
  • Resolve a comment to promote it to a decision your coding agent can act on
  • Reopen a resolved decision if it still needs work
Each comment is anchored to the UI region it concerns. Clicking a pin in the canvas scrolls to its card in the side panel; clicking a card scrolls to and highlights its pin. When you re-capture a screen, Lace carries comments forward and re-anchors them to the matching element. Comments it can no longer place are kept in the side panel but not drawn on the canvas.

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Flows

From the canvas, add more screenshots to build a multi-step flow. The flow appears as a carousel you can click through, with comments and decisions visible at each step. Each flow is auto-titled and editable. You can return to any flow to review past decisions, add new comments, or update a screenshot when the product changes.

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Sharing

Open the share popover from the canvas toolbar to create a share link. People outside your organization can open the link and view the captures, comments, and decisions. Authenticated recipients can also leave comments — only unauthenticated visitors are fully read-only. From the popover you can:
  • Copy the link to share it
  • Revoke the link to cut all access
  • Toggle whether the chat discussion behind each decision is included (off by default)

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Reviews page

The Reviews tab in the sidebar lists all your canvases. Two sub-tabs:
  • My Reviews — canvases you own; you can share, revoke, and add comments
  • Shared — canvases shared with you by someone else; read-only unless the owner grants editing access

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Decisions and MCP

When you resolve a comment, it becomes a decision tied to the specific UI element it references, including the screenshot, spatial context, and any discussion. Resolved decisions are exposed through MCP so your coding agent can query them, see exactly what needs to change, and ship the fix.