Plugin marketplace for Claude Code and coding CLIs

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Why Developer Kit?

Developer Kit is a modular plugin marketplace for Claude Code that teaches Claude how to perform development tasks in a repeatable, high-quality way. Instead of generic AI responses, you get domain-specific expertise for your exact tech stack.

• 🧩 Modular by Design — Install only what you need. Java developer? Grab developer-kit-java. Full-stack TypeScript? Add developer-kit-typescript.
• 🎯 Domain Experts — 45+ specialized agents for code review, refactoring, security audits, architecture design, and testing across 7+ languages.
• 📚 150+ Skills — Reusable capabilities from Spring Boot CRUD generation to CloudFormation templates, all with best practices built-in.
• 🔄 Multi-CLI Support — Works with Claude Code, GitHub Copilot CLI, OpenCode CLI, and Codex CLI.
• ⚡ Auto-Activation — Path-scoped rules automatically activate when you open relevant files. No configuration needed.

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Installation

Quick Install (Recommended)

Claude Code

# Install from marketplace
/plugin marketplace add giuseppe-trisciuoglio/developer-kit

# Or install from local directory
/plugin install /path/to/developer-kit

Claude Desktop

Enable Skills in Settings → Add giuseppe-trisciuoglio/developer-kit

Manual Installation

# Clone the repository
git clone https://github.com/giuseppe-trisciuoglio/developer-kit.git

# Install via Makefile (auto-detects your CLI)
cd developer-kit
make install

# Or install for specific CLI
make install-claude      # Claude Code
make install-opencode    # OpenCode CLI
make install-copilot     # GitHub Copilot CLI
make install-codex       # Codex CLI

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Quick Start

# After installation, start your CLI
claude

# Check available commands
/help

# Use a Developer Kit command
/devkit.refactor

Example Prompts

Generate a complete CRUD module for User entity with NestJS and Drizzle ORM
Review this Java Spring Boot service for security issues
Create a CloudFormation template for ECS with auto-scaling
Help me refactor this monolithic class into clean architecture
Generate unit tests for this TypeScript service with 100% coverage

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Usage

Developer Kit provides four layers of capabilities:

1. Skills

Reusable capabilities loaded on-demand. Example:

[Skill: spring-boot-crud-patterns activated]

Skills automatically provide patterns, templates, and best practices for specific tasks.

2. Agents

Specialized sub-agents for complex workflows:

# Invoke via natural language
"Review this code as a Spring Boot expert"

# Or use commands
/devkit.java.code-review
/devkit.typescript.code-review

3. Rules

Path-scoped rules auto-activate based on file patterns:

# Auto-activates for *.java files
globs: ["**/*.java"]
---
Always use constructor injection. Never use field injection with @Autowired.

📋 Note on Rules Installation

Plugins do not automatically install rules into your project. To use the rules, you can copy them manually or use the Makefile command:

# Copy rules from a specific plugin
make copy-rules PLUGIN=developer-kit-java

# Or manually copy .md files from the plugin's rules/ folder
mkdir -p .claude/rules
cp plugins/developer-kit-[language]/rules/*.md .claude/rules/

The rules will be automatically activated based on the globs: patterns defined in the header of each file.

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Available Plugins

Plugin	Language/Domain	Components	Description
developer-kit-core	Core	6 Agents, 8 Commands, 4 Skills	Required base plugin with general-purpose capabilities
developer-kit-java	Java	9 Agents, 11 Commands, 51 Skills, 4 Rules	Spring Boot, LangChain4J, AWS SDK, GraalVM
developer-kit-typescript	TypeScript	13 Agents, 3 Commands, 25 Skills, 17 Rules	NestJS, React, Next.js, Drizzle ORM, Monorepo
developer-kit-python	Python	4 Agents, 4 Rules	Django, Flask, FastAPI, AWS Lambda
developer-kit-php	PHP	5 Agents, 3 Skills, 4 Rules	WordPress, Sage, AWS Lambda
developer-kit-aws	AWS	3 Agents, 19 Skills	CloudFormation, SAM, CLI, Architecture
developer-kit-ai	AI/ML	1 Agent, 3 Skills, 1 Command	Prompt Engineering, RAG, Chunking
developer-kit-devops	DevOps	2 Agents	Docker, GitHub Actions
developer-kit-tools	Tools	4 Skills	NotebookLM, Copilot CLI, Gemini, Codex
github-spec-kit	GitHub	3 Commands	GitHub spec integration

Total: 150+ Skills | 45+ Agents | 20+ Commands | 45+ Rules

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Plugin Architecture

developer-kit/
├── plugins/
│   ├── developer-kit-core/          # Required base
│   │   ├── agents/                  # Agent definitions (.md)
│   │   ├── commands/                # Slash commands (.md)
│   │   ├── skills/                  # Reusable skills (SKILL.md)
│   │   ├── rules/                   # Auto-activated rules
│   │   └── .claude-plugin/
│   │       └── plugin.json          # Plugin manifest
│   ├── developer-kit-java/          # Java ecosystem
│   ├── developer-kit-typescript/    # TypeScript ecosystem
│   └── ...
├── .skills-validator-check/         # Validation system
└── Makefile                         # Installation commands

Each plugin is self-contained with its own manifest, components, and dependencies.

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Configuration

Plugin Selection

Install only the plugins you need:

# Core + Java + AWS
make install-claude
# Then enable: developer-kit-core, developer-kit-java, developer-kit-aws

# Full-stack TypeScript
# Enable: developer-kit-core, developer-kit-typescript, developer-kit-aws

Rules Auto-Activation

Rules automatically activate based on file patterns:

---
globs: ["**/*.java"]
---
# This rule activates for all Java files
- Use constructor injection
- Follow naming conventions

LSP Integration

Language plugins include LSP server configurations (.lsp.json):

Language	Server
Java	jdtls
TypeScript	typescript-language-server
Python	pyright-langserver
PHP	intelephense

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Language Support Matrix

Language	Skills	Agents	Commands	Rules	LSP
Java/Spring Boot	51	9	11	4	✅
TypeScript/Node.js	25	13	3	17	✅
Python	2	4	0	4	✅
PHP/WordPress	3	5	0	4	✅
AWS/CloudFormation	19	3	0	0	❌
AI/ML	3	1	1	0	❌

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Validation & Quality

Developer Kit includes a comprehensive validation system:

# Validate all components
python .skills-validator-check/validators/cli.py --all

# Security scan (MCP compliance)
make security-scan

# Pre-commit hooks
.skills-validator-check/install-hooks.sh

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Ecosystem

Listed on:

• context7 — Skills marketplace
• skills.sh — AI skills directory

Related Projects:

• Claude Code — AI-powered terminal from Anthropic
• OpenCode — Open-source AI coding assistant
• GitHub Copilot CLI — AI pair programming
• Codex CLI — OpenAI's coding agent

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Contributing

We welcome contributions! See CONTRIBUTING.md for:

• Adding new skills, agents, and commands
• Plugin development guidelines
• Validation requirements
• Branch strategy and versioning

Security

Skills can execute code. Review all custom skills before deploying:

• ✅ Only install from trusted sources
• ✅ Review SKILL.md before enabling
• ✅ Test in non-production environments first
• ✅ Run make security-scan before releases

Security scans run automatically via GitHub Actions on every PR.

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License

MIT License — Open source and free to use.

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Acknowledgments

• Claude Code by Anthropic — The foundation this plugin system extends
• Qwen Code — README design inspiration
• Contributors — Thank you to everyone who has contributed skills and plugins

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