A setup guide for Herdr, including its command-line installation, configuration, updates, troubleshooting, and Pi integration.

Use it when checking Herdr's status, inspecting available commands, installing the Pi integration, or updating Herdr when requested.

It helps resolve missing-command, PATH, version, and integration problems using the Herdr installation that is actually present.

herdr-setup — Skill for Claude Code and Codex by espennilsen: A setup guide for Herdr, including its command-line installation…

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.

agentmods

npx agentmods add skills/espennilsen/pi/herdr-setup

Any agent

npx skills add espennilsen/pi --skill herdr-setup

Clone the repo

git clone --depth 1 https://github.com/espennilsen/pi

Made for: Claude Code, Codex.

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/espennilsen/pi/herdr-setup.svg)](https://agentmods.dev/skills/espennilsen/pi/herdr-setup)

Your own site

<a href="https://agentmods.dev/skills/espennilsen/pi/herdr-setup"><img src="https://agentmods.dev/badge/skills/espennilsen/pi/herdr-setup.svg" alt="Measured on agentmods" height="20"></a>

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 468 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 2 findings. Scan, not verified.

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	$0.00033	$0.00468
Opus 5	$0.00016	$0.00234
Sonnet 5	$0.00007	$0.00094
Haiku 4.5	$0.00003	$0.00047

Measured 4d ago against content hash 282da3a9283b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

herdr-setup scanned grade C with 2 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 4d ago.

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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://herdr.dev/install.sh | sh

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://herdr.dev/install.sh | sh

.pi/skills/herdr-setup/SKILL.md · 63 lines

What it actually says

Herdr Setup

Use the installed binary as the source of truth. Do not assume a command or flag from a different version exists.

Inspect first

command -v herdr
herdr --version
herdr --help
herdr integration status

If herdr is absent, explain that it supports Linux and macOS. On Windows, the native preview installer is available; use WSL only if the native preview is unsuitable. Ask before running either upstream installer:

irm https://herdr.dev/install.ps1 | iex

curl -fsSL https://herdr.dev/install.sh | sh

After installation, start a new shell if PATH has not refreshed, then rerun herdr --version.

Integrate Pi

Inspect integration state before changing it:

herdr integration status

Install or update the Pi integration only when requested:

herdr integration install pi

Use herdr integration status --outdated-only to identify stale integrations. Do not remove an integration without confirmation.

Updates and configuration

Use herdr update only when the user asks to update.
Use herdr --default-config to inspect defaults before editing configuration.
Treat HERDR_CONFIG_PATH, HERDR_SESSION, and HERDR_SOCKET_PATH as explicit overrides; report their values before troubleshooting a surprising target/session.

Command or version mismatch

Stop guessing after an unknown-command or unknown-flag error.
Run herdr --help, then <known-group> --help for the installed command tree.
Read the upstream docs fallback, selecting the installed release version when available.
If the installed help and matching version docs disagree, prefer installed help and report the discrepancy.

Safety

herdr server stop, session stop, session delete, and workspace/tab/pane close affect live work. List or inspect state first and ask for confirmation before running them.

Files

What ships with it

1 file 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.

references/upstream-docs.md 1.2 KB

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.

4d ago First seen · 63 lines · 33 tokens per session scan C 282da3a9283b

Subscribe to this mod's changes

herdr-setup is a skill published in the GitHub repository espennilsen/pi (117 stars, last pushed 11d ago), licensed MIT. It adds 33 tokens to every session and 468 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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herdr-setup