Open a screenshot. Mark the fixes. Copy the board.

Markloom is a static review board for agents. The default flow is one app screenshot in the center. Add a reference image only when it actually helps.

Open board Download skill

What the board is for.

Open a screenshot, draw exactly what needs to change, then copy the whole marked-up board. A reference image can sit beside it, but the screenshot stays the main subject.

A Markloom review board with a screenshot, red hand-drawn annotations, and an optional reference image.

Use one image first.

For most review tasks, pass a single screenshot. Markloom centers it and keeps the canvas clean for annotations.

{
  "title": "App Screen Review",
  "storageKey": "app-screen-review-20260605",
  "pairs": [
    {
      "id": "home",
      "image": "https://example.com/home-screen.png"
    }
  ]
}

Reference images are optional.

When a user provides a target style, golden, or second screenshot, add `reference`. Otherwise keep the board single-image.

{
  "id": "home",
  "title": "Home Screen",
  "image": "https://example.com/current.png",
  "reference": "https://example.com/reference.png",
  "imageLabel": "Screenshot",
  "referenceLabel": "Reference"
}

Agent rules.

Keep payloads boring. Put only the images and optional labels in the hash, then draw visual feedback on the board.