Moonsong Labs Plugins

A collection of plugins for agentic AI assistants, built on top of composable "skills" and instructions that make sure your agent uses them.

Plugins

Plugin Management

Create, review, customize, and manage plugins and reusable agent artifacts. Includes workflows for scaffolding plugins, writing skills against a shared standard, reviewing skill bundles and subagents, and adapting distributable plugins for your organization.

Core Engineering

A complete software engineering workflow: brainstorming, planning, TDD, debugging, code review, and more. Built on composable skills that trigger automatically when your agent encounters relevant tasks.

Moonbeam Engineering

A collection of skills that enhance AI agents with specialized capabilities for developing on the Moonbeam parachain: adding pallets, precompiles, XCM messaging, runtime development, testing, migrations, and more.

Installation

Note: Installation differs by platform. Claude Code and Cursor have built-in plugin marketplaces. Codex and OpenCode require manual setup.

Claude Code (via Plugin Marketplace)

In Claude Code, register the marketplace first:

/plugin marketplace add Moonsong-Labs/knowledge-work-plugins

Then install the plugin from this marketplace:

/plugin install core-engineering@moonsong-labs

Cursor

Cursor automatically detects plugins installed by Claude Code. Install via Claude Code first, then restart Cursor.

Codex

Tell Codex:

Fetch and follow instructions from https://raw.githubusercontent.com/Moonsong-Labs/knowledge-work-plugins/refs/heads/main/core-engineering/.codex/INSTALL.md

Detailed docs: core-engineering/docs/README.codex.md

OpenCode

Tell OpenCode:

Fetch and follow instructions from https://raw.githubusercontent.com/Moonsong-Labs/knowledge-work-plugins/refs/heads/main/core-engineering/.opencode/INSTALL.md

Detailed docs: core-engineering/docs/README.opencode.md

Verify Installation

Start a new session in your chosen platform and ask for something that should trigger a skill (for example, "help me plan this feature" or "let's debug this issue"). The agent should automatically invoke the relevant skill.

Philosophy

• Test-Driven Development - Write tests first, always
• Systematic over ad-hoc - Process over guessing
• Complexity reduction - Simplicity as primary goal
• Evidence over claims - Verify before declaring success

Contributing

Development

To run the root just check and just test recipes locally, install these CLIs and make sure they are on your PATH:

• just
• bun (provides bunx for markdownlint-cli2 and shellcheck)
• go (used via go run for shfmt and actionlint)
• yamllint
• typos
• skills-ref
• claude (Claude Code CLI)
• jq
• node and npm
• python3
• git
• GNU timeout (coreutils; on macOS you may need to install it separately so timeout is available in PATH)

You do not need to install markdownlint-cli2, shellcheck, shfmt, or actionlint separately because the root justfile runs them through bunx and go run.

The Claude-based test suites also expect the local plugin to be enabled. This can be most easily be enabled via the --plugin-dir command line option.

Adding a skill to an existing plugin

The writing-skills skill in the plugin-management plugin guides you through creating and testing new skills.

1. Fork and clone the repository

2. Start Claude Code with the plugin-management plugin loaded:

   claude --plugin-dir ./plugin-management

3. Ask your agent to create a new skill:

   I want to add a new skill to [plugin name] for [describe what it does]
   

   The writing-skills skill will activate and guide you through the TDD process: write failing tests (baseline behavior), write the skill, verify it works, and refactor.

4. Submit a PR with your new skill.

Creating a new plugin

Plugins are self-contained directories at the root of this repository. The plugin-management plugin provides a guided workflow for creating new plugins.

1. Fork and clone the repository

2. Start Claude Code with the plugin-management plugin loaded:

   claude --plugin-dir ./plugin-management

3. Ask your agent to create a new plugin:

   I want to create a new plugin for [describe what it does]
   

   The create-plugin skill will activate and walk you through a 5-phase process: discovery, component planning, designing your first component, generating all files, and validation.

4. Submit a PR with your new plugin.

Updating

Skills update automatically when you update the plugin:

/plugin update core-engineering

Acknowledgments

Inspired by:

• Anthropic knowledge-work-plugins
• Superpowers
• awesome-claude-code-subagents