herdr SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
herdr from modem-dev/ossrules is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add modem-dev/ossrules/herdr@git:20260914.a750666Pins git:20260914.a750666 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- modem-dev/ossrules
- Path
public/files/herdr/skills/herdr/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260914.a750666, committed Sep 14, 2026
- Size
- 12,600 bytes
- Repository stars
- 62
- License
- MIT
Control Herdr, a terminal multiplexer for coding agents. Use only when the user explicitly mentions Herdr or asks to use Herdr to inspect or control panes, tabs, workspaces, commands, or another agent. Do not use merely because a task could benefit from a background terminal, delegation, or parallel work. Requires HERDR_ENV=1.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Herdr
Herdr organizes terminals into workspaces, tabs, and panes, recognizes coding agents running inside panes, and exposes the current session through the `herdr` CLI.
Before issuing any control command, verify that this agent is running inside a Herdr-managed pane:
```bash
test "${HERDR_ENV:-}" = 1
```
If the check fails, say that you are not running inside Herdr and stop. Do not inspect or control the focused Herdr session from outside Herdr.
When the check passes, the `herdr` binary in `PATH` talks to the current session. Use it to inspect neighboring work, create terminal layout, start agents and commands, read output, and wait for state changes.
## Learn the current CLI
The installed binary is the authority for command syntax. Start with:
```bash
herdr --help
```
Then print the relevant command group by running the group without a subcommand:
```bash
herdr agent
herdr pane
herdr workspace
herdr tab
herdr worktree
herdr terminal
herdr notification
herdr integration
herdr session
herdr machine
```
…Read the whole file at its exact version.
How to install
mdr add modem-dev/ossrules/herdr@sha256:25a68bc36d930904The line at the top of this page pins the label git:20260914.a750666, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_zucyedexivhuzd4k)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 14, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12600 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
modem-dev/ossrules · 62 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zucyedexivhuzd4k GET https://markdownregistry.com/api/v1/resolve?ref=modem-dev/ossrules/herdr GET https://markdownregistry.com/api/v1/blob/25a68bc36d9309048db89e7d168f2e04d1689d734c5d72cc3688bf4ff9db1e9f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from modem-dev/ossrules
Every file in modem-dev/ossrules