plugin-engineer_skill

Overview

This skill transforms external repositories—CLIs, libraries, MCP servers—into Claude Code plugins with actionable skills and components. It guides the end-to-end pipeline from discovery and repo reconnaissance through pattern extraction, component authoring, packaging, and audit. Use it to convert real-world codebases into well-structured, distributable plugins.

How this skill works

The skill sequences discrete stages: discovery of external docs and community patterns, internal recon of the target repo, pattern extraction, mapping patterns to component types, authoring components, packaging as a plugin, and delegating an audit. Each stage uses specialized outfitter helper skills (research, codebase-recon, patterns, codify, skills-dev, claude-plugins, claude-plugin-audit) and stores artifacts under artifacts/plugin-engineer/. Quick mode short-circuits stages for simple, single-purpose repos.

When to use it

• Turning a CLI tool into a Claude Code plugin
• Creating skills that wrap an external library or API
• Building plugin companions for MCP servers
• Extracting repeatable automation patterns from a third-party repo
• Packaging workflow patterns around external tools

Best practices

• Always start with discovery and track outputs in artifacts/plugin-engineer/
• Validate that a pattern has at least three realistic use cases before authoring a component
• Prefer skills for multi-step workflows and commands for quick single actions
• Use the provided outfitter authoring skills rather than reinventing component scaffolding
• Run a formal audit before packaging or publishing the plugin

Example use cases

• Convert a developer CLI into a plugin exposing common commands as quick commands and a guided skill
• Wrap an HTTP library into skills that perform authenticated calls and parse responses
• Create a plugin companion for an MCP server to manage deployments and status checks
• Automate frequent multi-step workflows found in a repo (e.g., build→test→publish) by extracting and codifying patterns
• Quick-mode: package a small single-purpose CLI into a 1–2 skill plugin for immediate distribution