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Herdr Reviewr

Herdr Reviewr is a Rust terminal plugin and standalone terminal app for reviewing Git worktree diffs produced by coding agents. It displays changed files, supports line-level comments and, when used with herdr, sends those comments to the agent’s input.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Herdr Reviewr — OpenViST project profile in Coding Agents.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when an AI coding agent has changed a Git worktree and you want a terminal-based diff review with feedback tied to specific lines. Choose herdr mode when you need to send comments or review the latest-turn scope; standalone mode supports repository review without those two functions.

Who it is for

  • Developers reviewing code changes made by AI coding agents.
  • Herdr users who want to inspect diffs and return line-specific feedback without leaving the terminal.
  • Terminal-based reviewers who want to inspect a repository’s diffs in standalone mode.

Documented uses

  • Inspect worktree changes by file, branch, uncommitted state, latest turn or selected commits.
  • Leave comments on a line or range of lines and send them to a supported agent through herdr.
  • Search files and code or inspect current file contents while reviewing.
  • Read a branch’s pull request in a pane without posting to it.
Before you choose

Requirements & limits

The project is open source under the MIT license. Prebuilt binaries are available through the documented herdr plugin installation; a Rust toolchain is not required for that install.

  • The herdr plugin workflow requires herdr 0.9.3 or later and Git; the standalone app can review a repository but cannot send comments or use the last-turn scope.
  • The terminal must support truecolor and Unicode box-drawing.
  • An authenticated gh, glab, or az CLI is needed only for the read-only PR tab.
  • Reviewr does not modify the worktree or send comments without the reviewer’s action.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Install Reviewr as a herdr plugin

Install and open the Reviewr pane in the current herdr workspace.

Before you start

  • herdr 0.9.3 or later
  • Git on PATH
  • A truecolor terminal with Unicode box-drawing
  • macOS, Linux or Windows

Steps

  1. Run herdr plugin install persiyanov/herdr-reviewr.

  2. Open the plugin in the current workspace with herdr plugin action invoke open --plugin persiyanov.reviewr.

  3. Review the worktree’s changed files in the pane; the documented plugin workflow can open automatically when herdr creates a workspace for a worktree.

Expected outcome

Reviewr opens as a pane for inspecting the worktree’s diffs.

Guide limitations

  • Sending comments and the last-turn diff scope require herdr.
  • The PR tab requires an authenticated provider CLI: gh, glab, or az with the Azure DevOps extension.
Documentation 1 ↗
Source-based practical guide

Comment on a diff and send feedback

Attach line-level comments to a diff and pass them to the coding agent.

Before you start

  • Reviewr open beside the agent in a herdr workspace
  • A worktree with changes to review

Steps

  1. Choose a changed file in the navigator; use j and k to move through files or ] to move between hunks.

  2. Press Tab to focus the diff.

  3. Press v and use j and k to select lines, or select using the gutter.

  4. Press c, enter a comment and press Enter; press s to send all comments to the agent’s input.

Expected outcome

The selected-line comments are sent to the agent’s input.

Guide limitations

  • Sending requires herdr; standalone mode does not support Send.
  • Reviewr does not send comments on its own; the reviewer triggers the send action.
Documentation 1 ↗
COMPARE OPTIONS

Compare options for AI coding assistance

These projects document a common task and share a project role. This is a source-based comparison, not an execution benchmark or a guarantee of interchangeability.

ProjectDocumented purposePlatformAccess and requirements
Herdr ReviewrInspect worktree changes by file, branch, uncommitted state, latest turn or selected commits.CLIThe project is open source under the MIT license. Prebuilt binaries are available through the documented herdr plugin installation; a Rust toolchain is not required for that install.
SpectraClarify requirements and compare approaches before proposing a change.CLI, DesktopThe README lists a macOS and Windows desktop app, and a Homebrew installation for macOS. The CLI is published through npm and requires Node.js 22.14 or newer.
Skills — michaelshimelesInstall reusable task-specific skills into a coding-agent setup.CLIThe repository README provides an npx installation command for most coding agents and describes automatic or explicit skill invocation in Claude Code.
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
13 October 2026
Original website title
persiyanov/herdr-reviewr · Official homepage title · retained in its source language
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