Hand-crafted collection of advanced context engineering techniques and patterns with minimal token footprint focused on improving agent result quality.
Claude Code plugin marketplace is based on prompts used daily by our company developers for a long time, while adding plugins from benchmarked papers and high-quality projects.
- Simple to Use - Easy to install and use without any dependencies. Contains automatically used skills and self-explanatory commands.
- Token-Efficient - Carefully crafted prompts and architecture, preferring commands over skills, to minimize populating context with unnecessary information.
- Quality-Focused - Each plugin is focused on meaningfully improving agent results in a specific area.
- Granular - Install only the plugins you need. Each plugin loads only its specific agents, commands, and skills. Each without overlap and redundant skills.
- Scientifically proven - Plugins are based on proven techniques and patterns that were tested by well-trusted benchmarks and studies.
Open Claude Code
claudeAdd the Context Engineering Kit marketplace
/plugin marketplace add NeoLabHQ/context-engineering-kitThis makes all plugins available for installation, but does not load any agents or skills into your context.
Install any plugins, for example reflexion
/plugin install reflexion@NeoLabHQ/context-engineering-kitEach installed plugin loads only its specific agents, commands, and skills into Claude's context.
# start claude code
> claude "suggest how to improve codebase"
# Reflect on previous response and improve it if needed
> /reflexion:reflect
# Identify issues and strategies to solve them, and update CLAUDE.md with this knowledge
> /reflexion:memorizeTo get the latest plugin listings and updates from the marketplace:
/plugin marketplace update NeoLabHQ/context-engineering-kitTo view all available plugins:
/plugin- Reflexion - Introduces feedback and refinement loops to improve output quality.
- Code Review - Introduces codebase and PR review commands and skills using multiple specialized agents.
- Git - Introduces commands for commit and PRs creation.
- Test-Driven Development - Introduces commands for test-driven development, common anti-patterns and skills for testing using subagents.
- Subagent-Driven Development - Introduces skills for subagent-driven development, dispatches fresh subagent for each task with code review between tasks, enabling fast iteration with quality gates.
- Domain-Driven Development - Introduces commands to update CLAUDE.md with best practices for domain-driven development, focused on code quality, and includes Clean Architecture, SOLID principles, and other design patterns.
- Spec-Driven Development - Introduces commands for specification-driven development, based on Github Spec Kit, OpenSpec and BMad Method. Uses specialized agents for effective context management and quality review.
- Kaizen - Inspired by Japanese continuous improvement philosophy, Agile and Lean development practices. Introduces commands for analysis of root causes of issues and problems, including 5 Whys, Cause and Effect Analysis, and other techniques.
- Customaize Agent - Commands and skills for writing and refining commands, hooks, and skills for Claude Code, includes Anthropic Best Practices and Agent Persuasion Principles that can be useful for sub-agent workflows.
- Docs - Commands for analyzing projects, writing and refining documentation.
- Tech Stack - Commands for setting up or updating CLAUDE.md file with best practices for specific languages or frameworks.
- MCP - Commands for setting up well-known MCP server integration if needed and updating CLAUDE.md file with requirements to use this MCP server for the current project.
Collection of commands that force LLM to reflect on previous response and output.
How to install
/plugin install reflexion@NeoLabHQ/context-engineering-kitCommands
/reflexion:reflect- Reflect on previous response and output, based on Self-refinement framework for iterative improvement with complexity triage and verification/reflexion:memorize- Memorize insights from reflections and updates CLAUDE.md file with this knowledge. Curates insights from reflections and critiques into CLAUDE.md using Agentic Context Engineering/reflexion:critique- Comprehensive multi-perspective review using specialized judges with debate and consensus building
Based on papers like Self-Refine and Reflexion. These techniques improve the output of large language models by introducing feedback and refinement loops.
They are proven to increase output quality by 8–21% based on both automatic metrics and human preferences across seven diverse tasks, including dialogue generation, coding, and mathematical reasoning, when compared to standard one-step model outputs.
Full list of included patterns and techniques:
- Self-Refinement / Iterative Refinement - One model generates, then reviews and improves its own output
- Constitutional AI (CAI) / RLAIF - One model generates responses, another critiques them based on principles
- Critic-Generator or Verifier-Generator Architecture - Generator model creates outputs, Critic/verifier model evaluates and provides feedback
- LLM-as-a-Judge - One LLM evaluates/scores outputs from another LLM
- Debate / Multi-Agent Debate - Multiple models propose and critique solutions
- Generate-Verify-Refine (GVR) - Three-stage process: generate → verify → refine based on verification
On top of that, the plugin is based on the Agentic Context Engineering paper that uses memory updates after reflection, and consistently outperforms strong baselines by 10.6% on agents.
Also includes the following techniques:
- Chain-of-Verification (CoVe) - Model generates answer, then verification questions, then revises
- Tree of Thoughts (ToT) - Explores multiple reasoning paths with evaluation
- Process Reward Models (PRM) - Evaluates reasoning steps rather than just final answers
Comprehensive code review commands using multiple specialized agents for thorough code quality evaluation.
How to install
/plugin install code-review@NeoLabHQ/context-engineering-kitCommands
/code-review:review-local-changes- Comprehensive review of local uncommitted changes using specialized agents with code improvement suggestions/code-review:review-pr- Comprehensive pull request review using specialized agents
Agents
This plugin uses multiple specialized agents for comprehensive code quality analysis:
- bug-hunter - Identifies potential bugs, edge cases, and error-prone patterns
- code-quality-reviewer - Evaluates code structure, readability, and maintainability
- contracts-reviewer - Reviews interfaces, API contracts, and data models
- historical-context-reviewer - Analyzes changes in relation to codebase history and patterns
- security-auditor - Identifies security vulnerabilities and potential attack vectors
- test-coverage-reviewer - Evaluates test coverage and suggests missing test cases
Commands for streamlined Git operations including commits and pull request creation.
How to install
/plugin install git@NeoLabHQ/context-engineering-kitCommands
/git:commit- Create well-formatted commits with conventional commit messages and emoji/git:create-pr- Create pull requests using GitHub CLI with proper templates and formatting/git:analyze-issue- Analyze a GitHub issue and create a detailed technical specification/git:load-issues- Load all open issues from GitHub and save them as markdown files
Commands and skills for test-driven development with anti-pattern detection.
How to install
/plugin install tdd@NeoLabHQ/context-engineering-kitSkills
- test-driven-development - Introduces TDD methodology, best practices, and skills for testing using subagents
Skills for subagent-driven development with quality gates between tasks.
How to install
/plugin install sadd@NeoLabHQ/context-engineering-kitSkills
- subagent-driven-development - Dispatches fresh subagent for each task with code review between tasks, enabling fast iteration with quality gates
Commands for setting up domain-driven development best practices focused on code quality.
How to install
/plugin install ddd@NeoLabHQ/context-engineering-kitCommands
/ddd:setup-code-formating- Sets up code formatting rules and style guidelines in CLAUDE.md
Skills
- software-architecture - Includes Clean Architecture, SOLID principles, and other design patterns
Comprehensive specification-driven development workflow using specialized agents.
How to install
/plugin install sdd@NeoLabHQ/context-engineering-kit# start claude code
claude
# setup project constitution
/sdd:00-setup Use NestJS as backend framework, strictly follod SOLID principles and Clean Architecture.
# Generate new feature specification
/sdd:01-specify Add user authentication with OAuth
# Plan feature development
/sdd:02-plan
# Create detailed implementation tasks
/sdd:03-tasks
# Execute feature implementation
/sdd:04-implement
# Document completed feature implementation
/sdd:05-document Focus on API documentation
Commands
/sdd:00-setup- Create or update the project constitution from interactive or provided principle inputs/sdd:01-specify- Create or update the feature specification from a natural language feature description/sdd:02-plan- Plan the feature development based on the feature specification/sdd:03-tasks- Create detailed implementation tasks from feature plans with complexity analysis/sdd:04-implement- Execute feature implementation following task list with TDD approach and quality review/sdd:05-document- Document completed feature implementation with API guides, architecture updates, and lessons learned/sdd:brainstorm- Refines rough ideas into fully-formed designs through collaborative questioning and exploration
Agents
- code-architect - Designs system architecture and technical solutions
- code-explorer - Navigates and understands existing codebase structure
- code-reviewer - Reviews implementations against specifications and quality standards
Continuous improvement methodology inspired by Japanese philosophy and Agile practices.
How to install
/plugin install kaizen@NeoLabHQ/context-engineering-kitCommands
/kaizen:analyse- Auto-selects best Kaizen method (Gemba Walk, Value Stream, or Muda) for target analysis/kaizen:analyse-problem- Comprehensive A3 one-page problem analysis with root cause and action plan/kaizen:why- Iterative Five Whys root cause analysis drilling from symptoms to fundamentals/kaizen:root-cause-tracing- Systematically traces bugs backward through call stack to identify source of invalid data or incorrect behavior/kaizen:cause-and-effect- Systematic Fishbone analysis exploring problem causes across six categories/kaizen:plan-do-check-act- Iterative PDCA cycle for systematic experimentation and continuous improvement
Skills
- kaizen - Continuous improvement methodology with multiple analysis techniques
Commands and skills for creating and refining Claude Code extensions.
How to install
/plugin install customaize-agent@NeoLabHQ/context-engineering-kitCommands
/customaize-agent:create-command- Interactive assistant for creating new Claude commands with proper structure and patterns/customaize-agent:create-skill- Guide for creating effective skills with test-driven approach/customaize-agent:create-hook- Create and configure git hooks with intelligent project analysis and automated testing/customaize-agent:test-skill- Verify skills work under pressure and resist rationalization using RED-GREEN-REFACTOR cycle/customaize-agent:test-prompt- Test any prompt (commands, hooks, skills, subagent instructions) using RED-GREEN-REFACTOR cycle with subagents/customaize-agent:apply-anthropic-skill-best-practices- Comprehensive guide for skill development based on Anthropic's official best practices
Skills
- prompt-engineering - Well known prompt engineering techniques and patterns, includes Anthropic Best Practices and Agent Persuasion Principles
Commands for project analysis and documentation management.
How to install
/plugin install docs@NeoLabHQ/context-engineering-kitCommands
/docs:update-docs- Update implementation documentation after completing development phases
Commands for setting up language and framework-specific best practices.
How to install
/plugin install tech-stack@NeoLabHQ/context-engineering-kitCommands
/tech-stack:add-typescript-best-practices- Setup TypeScript best practices and code style rules in CLAUDE.md
Commands for integrating Model Context Protocol servers with your project.
How to install
/plugin install mcp@NeoLabHQ/context-engineering-kitCommands
/mcp:setup-context7-mcp- Guide for setup Context7 MCP server to load documentation for specific technologies/mcp:setup-serena-mcp- Guide for setup Serena MCP server for semantic code retrieval and editing capabilities/mcp:build-mcp- Guide for creating high-quality MCP servers that enable LLMs to interact with external services
This project improves plugins collected across multiple projects and marketplaces.
List of main sources:
- Official Claude Code plugins
- Claude Task Master
- Multi-agent Orchestration
- Anthropic example skills
- Claude Flow
- Superpowers
- Awesome Claude Skills
- Beads
Servers recommended for use with this marketplace:
This marketplace encapsulates the best from these projects, but you may want to use the full power of these techniques from the following projects: