# 5 Must-Have Herdr Plugins 🧩

By Zubair Ahmed · Published 2026-11-07
Source: https://www.grizzlybit.dev/blog/5-must-have-herdr-plugins

**The five Herdr plugins worth installing first are Agenttrail, herdr-nvim, Herdr Annotator, Revive and Over9k Usage.** Between them they show what your agents are working on, put an editor and a code review next to them, bring agents back after a reboot, and warn you before you hit your Claude or Codex limits.

In my [introduction to Herdr](https://www.grizzlybit.dev/blog/herdr-a-home-for-your-coding-agents) I covered the app itself. The real fun starts in the [gallery](https://herdr.dev/gallery/?type=mods), which at the time of writing lists **430 mods**. Herdr calls its plugins **mods**: add-ons that add panels, buttons, keys and whole new windows to the app.

Plenty of them are just for fun (there is a stock ticker, and one that turns every agent into a Pokémon). These five are the ones that solve problems you will actually hit when running several coding agents at once.

## 📦 How to Install a Herdr Mod

You don't install mods by hand. Every mod page gives you one line to paste to your agent:

```text
Read ~/.config/herdr-app/AGENTS.md, then add this mod: herdr.dev/mods/<owner>/<mod>
```

Mods are small JavaScript programs that reload live. Herdr's guide tells your agent exactly how to add one:

1. Read the mod's `RECIPE.md` and every file first, and **tell you if the mod reaches the network, runs programs or reads files outside its own folder**.
2. Copy it into `~/.config/herdr-app/mods/` without overwriting anything you already have.
3. Merge any keyboard shortcuts it brings, and **ask before replacing a key you already use**.
4. Run `herdr-app check` on it.

To remove a mod, delete its folder. If a mod doesn't work on your version, your agent can rebuild it from its `RECIPE.md`, which is a plain-English brief for building the mod from scratch.

## 1. 🗺️ Agenttrail: See What Your Agents Are Building

**Problem:** with several agents on one project, you lose track of who is doing what.

[Agenttrail](https://herdr.dev/mods/sodiumsun/agenttrail--herdr--agenttrail/) draws your project as a map beside your agents: cards with connectors, each card's tasks and progress, which card an agent is on right now, and the path it took to get there. It opens as a panel on the right, expands to full size, and follows the repo of whichever terminal you focus.

The map comes from your repo's `PLAN.md`. With no plan, it falls back to a simpler view of branches and worktrees from git. It is also read-only: it never writes to your agents, plans or repos.

It is the most-starred mod in the gallery by a wide margin, and once you have seen agents moving across a plan, a plain list of tabs feels blind.

```text
Read ~/.config/herdr-app/AGENTS.md, then add this mod: herdr.dev/mods/sodiumsun/agenttrail--herdr--agenttrail
```

## 2. ✏️ herdr-nvim: Neovim Beside Your Agents

**Problem:** you keep switching to another window to read and fix what an agent wrote.

[herdr-nvim](https://herdr.dev/mods/ChmaraX/herdr-nvim--herdr-app/) puts Neovim inside Herdr. The **Files** button (or `cmd-e`) opens a file tree of the tab's repo with that tab's own nvim next to it.

Two features make it more than an embedded editor:

- `cmd-o` lists the files the agent just **read and edited**, so you jump straight to its changes.
- Comments you write in nvim are **sent to the agent** with their `file:line`, so feedback goes to the agent instead of a separate chat.

If you live in Neovim, this is the first one to try.

```text
Read ~/.config/herdr-app/AGENTS.md, then add this mod: herdr.dev/mods/ChmaraX/herdr-nvim--herdr-app
```

## 3. 🔍 Herdr Annotator: Review Agent Code Like a Pull Request

**Problem:** agents produce diffs faster than you can review them, and copying feedback back into a prompt is tedious.

[Herdr Annotator](https://herdr.dev/mods/jakub-tucek/herdr-annotator/) lets you review your agent's code without leaving Herdr. Compare a branch, the last commit or uncommitted changes in a sidebar or a full review tab, leave comments on files or lines, and **send the whole review to the agent** working in that checkout.

It also reads GitHub PR review threads, so you can reply directly or queue comments for the agent to address. It works with local and SSH worktrees too.

```text
Read ~/.config/herdr-app/AGENTS.md, then add this mod: herdr.dev/mods/jakub-tucek/herdr-annotator
```

> Prefer reviewing GitHub or GitLab pull requests with an AI reviewer beside the diff? [Redline](https://herdr.dev/mods/iampedii/herdr-redline/) is a strong alternative.

## 4. ♻️ Revive: Bring Agents Back After a Reboot

**Problem:** Herdr keeps your agents running when the app closes, but after a reboot or a herdr-core restart you get a shell back, not your agent.

[Revive](https://herdr.dev/mods/dmazlum/herdr-revive/) fills exactly that gap. It brings back the coding agent a terminal lost, **in the same pane, with the same session and flags**. It can also fork the focused agent's conversation into a new session beside it, which is handy for trying a different approach without losing the original.

It supports Claude Code, Codex, pi, oh-my-pi, Factory Droid and the Cursor CLI. The author notes that Droid and Cursor support is built from their docs and not yet tested end to end.

```text
Read ~/.config/herdr-app/AGENTS.md, then add this mod: herdr.dev/mods/dmazlum/herdr-revive
```

## 5. 📊 Over9k Usage: Know Your Limits Before You Hit Them

**Problem:** running several agents in parallel burns through plan limits fast, and you only find out when one stops.

[Over9k Usage](https://herdr.dev/mods/herunan/herdr-over9k--over9k-usage/) puts Claude's, Codex's and Gemini's 5-hour and weekly limits on one line along the bottom of the window. Each is coloured green, yellow or red, with when it resets. Hover a service to see every limit.

It is tiny, and once agents run all day it saves you from finding out the hard way.

```text
Read ~/.config/herdr-app/AGENTS.md, then add this mod: herdr.dev/mods/herunan/herdr-over9k--over9k-usage
```

> Want history rather than a live meter? [Insights](https://herdr.dev/mods/GaganSD/coding-agent-toolkit--herdr-insights/) is a token-usage dashboard across Claude Code, Codex, OpenCode and more, built from session data already on your disk.

## 🏅 Honourable Mentions

- **[Recap](https://herdr.dev/mods/mrolafsson/herdr-recap--app/)**: come back to a dozen agents and see, grouped by whose move it is, a one-line recap of where each got to. You can answer a blocked agent right from the list.
- **[Automations](https://herdr.dev/mods/DnzzL/herdr-automations--app/)**: scheduled agent prompts. A prompt, a cron line and a repo, and an agent starts in a fresh worktree on schedule.
- **[Pokémon agents](https://herdr.dev/mods/mathieucroset/herdr-pokemon-agents/)**: every agent is a pixel-art Pokémon along the bottom of the window. Working ones walk, idle ones fall asleep, and a blocked one shows a pulsing "!". Completely unnecessary, and great.

## ⚠️ Before You Install

Every mod page carries the same warning:

> "Mods aren't reviewed by Herdr. Check what it runs and which keys it changes before adding it."

Mods are community code running next to agents that have access to your repos, so treat them like any other dependency:

- Read what your agent reports before it adds a mod, especially network access and programs it runs.
- Skim the mod's GitHub repo (every gallery page links to it).
- Prefer mods that say what they read and write. Agenttrail, for example, states that it only reads and never writes to your agents, plans or repos.
- Remove what you don't use. Fewer mods means fewer things to trust.

## 🤔 Final Thoughts

The best thing about Herdr's mod gallery is how specific the mods are. Each one exists because someone running agents all day hit a problem and asked their agent to fix it. Start with these five, then browse the [gallery](https://herdr.dev/gallery/?type=mods) for the problem you have.

And if nothing fits, that is the point of Herdr: describe what you want to your agent and build your own. To share it, put the mod folder in a public GitHub repo with a `RECIPE.md` and a `preview.png`, and add the repo topic `herdr-mod`. It shows up in the gallery within the hour.

Happy herding! 🐑