---
type: reference
title: Pi Plugins
description: The pi extension ecosystem and its notable packages - subagents, web access, permission, and skills.
tags:
  - pi
  - plugins
  - packages
  - engineering
timestamp: 2026-08-11
---
verified: 2026-08-28

# Pi Plugins

This page covers the pi coding agent extension ecosystem. Pi extends itself through npm packages installed with `pi install`. Each package provides extensions, skills, prompts, or themes.

## How Plugins Work

A pi plugin is an npm package that contains a `pi` manifest. The manifest points to the package's `skills/` and `extensions/` directories. The system reads the manifest at startup and loads the listed capabilities.

Plugins install to the pi home directory. Locally installed packages in this setup include `pi-peon`, `pi-web-access`, and the core `pi-subagents` extension. See the [Pi Packages](../pi/packages/index.md) page for local details.

## Notable Packages

The table lists packages verified in the npm registry during research. Popularity signals are approximate and change over time.

| Package | Purpose |
|---------|---------|
| `pi-subagents` | Core subagent delegation with chains and parallel execution. |
| `pi-web-access` | Web search, URL fetching, GitHub cloning, PDF extraction. |
| `@wierdbytes/pi-peon` | CESP/OpenPeon sound packs for lifecycle events. |
| `bigpowers` | A large collection of spec-driven development skills. |
| `pi-permission` | Layered shell command permissions. |
| `@anton-kochev/pi-skills` | Plan mode, TDD, and SRS skills (deprecated). |

Some package names that appear in older documentation, such as `pi-browser-use` and `pi-permission-system`, did not resolve in the npm registry at research time. Verify a package name before you install it.

## Related Ecosystem

Pi implements the open Agent Skills standard. This makes pi skills compatible with Claude Code, Codex CLI, Amp, Droid, Cursor, and many other agents. See the [Skills Ecosystem](/skills/ecosystem.md) page.

## Citations

* [npm registry](https://www.npmjs.com/)
* [Agent Skills standard](https://agentskills.io/)
* [vercel-labs/skills](https://github.com/vercel-labs/skills)

## See Also

* [Pi Configuration](../pi/index.md)
* [Pi Packages](../pi/packages/index.md)
* [Skills Documentation](../skills/index.md)