A terminal workspace manager that tracks workspaces, tabs, panes, and sibling coding agents running in other terminal areas.

It helps inspect terminal layouts, split panes, view files or long-running processes, and hand tasks to other coding agents.

It gives developers one view of related terminal sessions and makes it easier to divide work between agents.

herdr — Skill for Claude Code by bendrucker/claude

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add bendrucker/claude --skill herdr

Clone the repo

git clone --depth 1 https://github.com/bendrucker/claude

Made for: Claude Code.

Or install herdr, the plugin that ships this one along with the rest of its 1 skill.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/bendrucker/claude/herdr/github.svg)](https://agentmods.dev/skills/bendrucker/claude/herdr)

Your own site

<a href="https://agentmods.dev/skills/bendrucker/claude/herdr"><img src="https://agentmods.dev/badge/skills/bendrucker/claude/herdr/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/bendrucker/claude/herdr"><img src="https://agentmods.dev/badge/skills/bendrucker/claude/herdr.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 169 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,488 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00169	$0.03488
Opus 5.5	$0.00068	$0.01395
Sonnet 5.5	$0.00034	$0.00698
Haiku 4.5	$0.00017	$0.00349

Measured 10d ago against content hash 6c186bcf8ca8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

herdr scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/commands.sh, scripts/orient.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/herdr/skills/herdr/SKILL.md · 213 lines

How it starts

The opening of the file, as written. The whole thing — 213 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Herdr

Under HERDR_ENV=1, a request naming a pane, tab, workspace, or split is about this session's herdr layout.

Herdr App

HC_TERMINAL_ID set means this session runs in a herdr-core terminal, usually under the Herdr app. The herdr CLI and everything below drive the TUI's server, a separate process that can't see the app's terminals. Take commands from the manuals the installed binaries print:

hc --skill: terminals and agents, including starting, reading, sending to, and waiting on them. $HC_TERMINAL_ID is this session's address.
herdr-app --skill: the window, including spaces, tabs, layouts, and splits. herdr-app commands lists every command.

Dispatch a sibling agent by creating its worktree with wt switch --create <branch> --no-cd, then hc run --bg --name <branch> --cwd <worktree> claude "<prompt>". Claude Code reports its own status to herdr-core. Leave the herdr-core server running, since hc server stop ends every terminal.

Command Surface

!bash ${CLAUDE_SKILL_DIR}/scripts/commands.sh

For flags not shown above, herdr <group> <command> --help is complete: defaults, enum values, preconditions. Where the CLI and this file disagree, follow the CLI.

Bare herdr launches or attaches the TUI in this pane. A mutating command in bare form runs on its defaults instead of printing usage, so herdr workspace create creates a workspace.

Current Workspace

!bun ${CLAUDE_SKILL_DIR}/scripts/orient.ts

Columns are workspace, then pane agent/status session cwd title, with cwd shown only when it differs from the workspace checkout. That view projects herdr api snapshot, which returns this machine's workspaces, tabs, panes, layouts, and agents in one call. Prefer it to a sequence of list calls, and read it raw when the projection is wrong: herdr api snapshot | jq .

If the block reports a failure instead of a workspace listing, stop here and use ordinary tools. Nothing below reaches a server.

Output Formats

Most commands answer with a single-line JSON envelope. Pipe them through jq -r '.result...' rather than reading them raw:

Read the full file on GitHub · 213 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

10d ago Changed · -2 lines 6c186bcf8ca8
11d ago Changed · +10 lines · +21 tokens per session e676f1db133d
12d ago Changed · +7 tokens per session 0308fae4d30a
26d ago Changed · -37 lines a57163352635
27d ago Changed 09783f20cf61
1mo ago Changed d0ce7a775e29
1mo ago Changed f7a130d2a6ff
1mo ago Changed · +9 lines 77b7ce22856c
1mo ago Changed · +11 lines b8707ee77149
1mo ago First seen · 222 lines · 141 tokens per session scan A 1d8c8a4145f7

Subscribe to this mod's changes

herdr is a skill published in the GitHub repository bendrucker/claude (18 stars, last pushed today), licensed MIT. It adds 169 tokens to every session and 3,488 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Building agents Claude Code Productivity claude-code-plugin

herdr next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
herdrbendrucker/claude	Skill	18	today	MIT	A	169	Claude Code
release-noteskenryu42/cc-safety-net	Skill	2.0k	today	MIT	A	65	Claude Code, Codex
add-teamsmicrosoft/power-platform-skills	Skill	1.1k	today	MIT	A	31	Claude Code
relationsLifecycle-Innovations-Limited/claude-ops	Skill	550	3d ago	MIT	A	27	Claude Code
service-deskcbrock84/headcount	Skill	2.6k	22d ago	MIT	A	73	Claude Code
recipe-add-integration-testsshinpr/claude-code-workflows	Skill	713	4d ago	MIT	A	19	Claude Code
llm-friendly-contextshinpr/claude-code-workflows	Skill	713	4d ago	MIT	A	52	Claude Code