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How to mark up a page an agent opened and send notes back with Herdr Gpui

Pick elements or regions on an agent's browser page and send your notes to that agent.

Who it is forA developer whose coding agent builds a web page or local app and needs visual feedback on it.

The problemDescribing a UI bug to an agent in words is slow, and screenshots lose the exact element you mean.

The outcomeThe agent's browser tab shows your annotations on specific elements or regions, and those notes go back to the same agent.

What you need first

  • A Herdr daemon installed on your machine first, since this app is only its client
  • macOS 14.2 Sonoma or newer with Homebrew, or a supported Linux distribution with glibc 2.39 or newer, or Windows with PowerShell
  • For building from source: Rust via rustup, plus the Xcode command-line tools on macOS or the Visual Studio C++ build tools and Windows SDK on Windows

Steps

  1. Ask the agent to open its page with herdr-gpui browser open followed by the page address; the README excerpt does not show the argument form. (inferred, check the README)
  2. Open the browser tab in the app and pick the elements or regions that need changes.
  3. Write a note on each pick.
  4. Send the annotations back to that agent.
  5. Check any listening ports, such as :4173, shown under the workspace.

Prompt for your agent

Have the agent run `herdr-gpui browser open` on the local page it is building in <workspace-name>, then review the annotations the user adds in the browser tab. Report which elements or regions were annotated and what each note asks for. Verify that the notes were sent to the same agent session.

Caveat. The command form beyond `herdr-gpui browser open` is not shown in the README excerpt, so confirm the exact arguments with the project's command line docs before automating it.

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