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How to take annotated or skip-if-unchanged screenshots with Agent Browser

Use screenshot options built for agents: numbered element labels and skipping unchanged images.

Short answer: Full page: agent-browser screenshot page.png (add --full for full page); then Labeled elements: agent-browser screenshot --annotate; save tokens: agent-browser screenshot --if-changed. All steps.

Who it is forSomeone whose visual checks burn tokens on near-identical screenshots.

The problemAgents re-read the same screenshot again and again.

The outcomeScreenshots only when something changed, with labels the agent can refer to.

What you need first

  • npm, Homebrew or Cargo
  • Chrome (agent-browser install downloads Chrome for Testing)

Steps

  1. Full page: agent-browser screenshot page.png (add --full for full page)
  2. Labeled elements: agent-browser screenshot --annotate
  3. Save tokens: agent-browser screenshot --if-changed

Prompt for your agent

With vercel-labs/agent-browser, load <url>, take an annotated screenshot, change <setting>, and take a --if-changed screenshot. Tell me what changed on the page.

Caveat.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for vercel-labs/agent-browser and "Take annotated or skip-if-unchanged screenshots"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

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