Agent skill

Herdr

Control herdr from inside it. An agent skill from ninehills/skills.

No licenceAuto-check passed

Install Herdr

skills CLI

$ npx skills add ninehills/skills --skill herdr -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install ninehills/skills herdr --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/ninehills/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/herdr .claude/skills/herdr && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "herdr" agent skill from https://github.com/ninehills/skills/tree/main/herdr into .claude/skills/herdr/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "herdr", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/ninehills/skills/tree/main/herdr

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add ninehills/skills --skill herdr -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install ninehills/skills herdr --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ninehills/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/herdr .agents/skills/herdr && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "herdr" agent skill from https://github.com/ninehills/skills/tree/main/herdr into .agents/skills/herdr/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "herdr", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add ninehills/skills --skill herdr -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install ninehills/skills herdr --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ninehills/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/herdr .cursor/skills/herdr && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "herdr" agent skill from https://github.com/ninehills/skills/tree/main/herdr into .cursor/skills/herdr/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "herdr", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/ninehills/skills.git --path herdr

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add ninehills/skills --skill herdr -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install ninehills/skills herdr --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ninehills/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/herdr .gemini/skills/herdr && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "herdr" agent skill from https://github.com/ninehills/skills/tree/main/herdr into .gemini/skills/herdr/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "herdr", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install ninehills/skills herdr

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add ninehills/skills --skill herdr -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/ninehills/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/herdr .github/skills/herdr && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "herdr" agent skill from https://github.com/ninehills/skills/tree/main/herdr into .github/skills/herdr/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "herdr", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add ninehills/skills --skill herdr -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install ninehills/skills herdr --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ninehills/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/herdr .opencode/skills/herdr && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "herdr" agent skill from https://github.com/ninehills/skills/tree/main/herdr into .opencode/skills/herdr/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "herdr", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: herdr
GitHub stars: 280
Token cost: ~3.5k tokens
SKILL.md length: 1,237 words
Files: 2
Skills in repo: 38
Repo updated: Jun 22, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

Control herdr from inside it. An agent skill from ninehills/skills.

Running inside herdr (HERDRENV=1)
SKILL.md covers verified version, concepts, discover yourself and do not redirect pane output to…, plus 12 more sections
Calls python3

What it does

Herdr is an agent skill from ninehills/skills. Control herdr from inside it. Manage workspaces and tabs, split panes, run commands, read output, and wait for state changes — all via CLI commands that talk to the running herdr instance over a local unix socket. Use when running inside herdr (HERDRENV=1).

Its SKILL.md is about 3.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `TEST.md`).

When your agent uses it

Running inside herdr (HERDRENV=1)

Example prompts

“/herdr”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit f3e82a7. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- python3
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- herdr.dev
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Herdr loads about 3.5k tokens when it runs. Until then it costs about 66 tokens; SKILL.md has 1,237 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~66
When it runs · the whole SKILL.md, loaded when a task matches: ~3.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,237 words (~3,501 tokens).

“you are running inside herdr, a terminal-native agent multiplexer. herdr gives you workspaces, tabs, and panes — each pane is a real terminal with its own shell, agent, server, or log stream — and you can control all of it…”

— opening of SKILL.md by ninehills

name: herdr

Outline of SKILL.md

herdr — agent skill
verified version
concepts
discover yourself
do not redirect pane output to files
pane commands (the only way to interact with panes)
sending messages to a pane
spawn a new agent
wait patterns
reading output
workspace management
tab management
close a pane
integrations
named sessions
recipes
run a server and wait until it is ready
run tests in a separate pane and inspect the result
check what another agent is working on
watch another pane robustly
spawn a new agent and give it a task
coordinate with another agent
multi-turn conversation with an agent
notes

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in herdr of ninehills/skills.

SKILL.md
TEST.md

Open the folder on GitHubat commit f3e82a7

Compare with similar skills

Herdr next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Herdr compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Herdr this skillninehills/skills	280	—	~3.5k	Automated safety check: Pass	None	3 mo ago
Herdrdavidondrej/skills	4.1k	—	~2.1k	Automated safety check: Pass	MIT	2 days ago
Herdr Throwaway Reproductionherdrdev/herdr	43k	—	~2.4k	Automated safety check: Pass	Apache-2.0	2 days ago
Google Workspace Opsaffaan-m/ECC	276k	—	~299	Automated safety check: Pass	MIT	yesterday
Tabs Accessibilitythedaviddias/Front-End-Checklist	74k	—	~409	Automated safety check: Pass	MIT	4 days ago
Herdr Kit Workflowsmastra-ai/mastra	29k	—	~3.9k	Automated safety check: Pass	Custom licence	today

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Questions about Herdr

What does Herdr do?

Control herdr from inside it. An agent skill from ninehills/skills. Herdr is an agent skill from ninehills/skills. Control herdr from inside it.

When should I use Herdr?

Herdr fits situations like: running inside herdr (HERDRENV=1).

How do I install Herdr in Claude Code?

Run `npx skills add ninehills/skills --skill herdr -a claude-code`. Or copy the skill folder (herdr in ninehills/skills) into .claude/skills/herdr in your project. Claude Code loads it when a task matches its description.

How do I install Herdr in Codex?

Run `npx skills add ninehills/skills --skill herdr -a codex`. Or copy the skill folder (herdr in ninehills/skills) into .agents/skills/herdr in your project. Codex loads it when a task matches its description.

Can I use Herdr in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ninehills/skills --skill herdr -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/herdr, .gemini/skills/herdr, .github/skills/herdr and .opencode/skills/herdr in your project.

What does Herdr need to run?

Going by SKILL.md and its folder, Herdr needs the command-line tools its instructions call (python3). Our summary lists: Python 3.

Does Herdr access the network?

SKILL.md names 1 domain. As links in the text: herdr.dev. This is read from the text; nothing was executed.

Is Herdr safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Herdr use?

No licence was found for Herdr or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Herdr use?

About 3.5k tokens (SKILL.md is roughly 14k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Herdr?

Skills that share tags, products or a category with Herdr: Herdr (davidondrej/skills, 4.1k stars), Herdr Throwaway Reproduction (herdrdev/herdr, 43k stars), Google Workspace Ops (affaan-m/ECC, 276k stars) and Tabs Accessibility (thedaviddias/Front-End-Checklist, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Herdr?

ninehills (a GitHub user) maintains it in ninehills/skills, which has 280 GitHub stars. The repository holds 38 skills in this directory. The repository was last updated on June 22, 2026.

Source: ninehills/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Herdr

Install Herdr

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

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Questions about Herdr