Hand-crafted collection of advanced context engineering techniques and patterns with minimal token footprint, focused on improving agent result quality and predictability.
The marketplace is based on prompts used daily by our company developers for a long time, supplemented by plugins from benchmarked papers and high-quality projects.
Key Features
- 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 command-oriented skills with sub-agents over general information skills when possible, 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 or redundant skills.
- Scientifically proven - Plugins are based on proven techniques and patterns that were tested by well-trusted benchmarks and studies.
- Open-Standards - Skills are based on agentskills.io specification. The SDD plugin is based on the Arc42 specification standard for software development documentation.
News
Updates from key releases:
- v2.0.0: Spec-Driven Development plugin was rewritten from scratch. It is now able to produce working code in 99% of cases on real-life production projects!
- v2.1.0: Spec-Driven Development plugin agents include high-level code quality guidelines from DDD plugin.
- v2.2.0: Subagent-Driven Development plugin now works as a distilled version of SDD plugin using meta-judge and judge sub-agents for specification generation on the fly and in parallel to implementation. DDD plugin now includes Clean Architecture, DDD, SOLID, Functional Programming, and other pattern examples as rules that are automatically added to the context during code writing.
Quick Start
Step 1: Install Marketplace and Plugins
Claude Code
Open Claude Code and add the Context Engineering Kit marketplace
/plugin marketplace add NeoLabHQ/context-engineering-kit
This makes all plugins available for installation, but does not load any agents or skills into your context.
Install any plugin, for example reflexion:
/plugin install reflexion@NeoLabHQ/context-engineering-kit
Each installed plugin loads only its specific agents, commands, and skills into Claude's context.
Cursor, Antigravity, Codex, OpenCode and others
Run the vercel-labs/skills command in your terminal:
npx skills add NeoLabHQ/context-engineering-kit
You can pick which skills and agents to install.
Alternative installation methods
You can use OpenSkills to install skills by running the following commands:
npx openskills install NeoLabHQ/context-engineering-kit
npx openskills sync
Step 2: Use Plugin
> claude "implement user authentication"
# Claude implements user authentication, then you can ask it to reflect on implementation
> /reflexion:reflect
# It analyses results and suggests improvements
# If issues are obvious, it will fix them immediately
# If they are minor, it will suggest improvements that you can respond to
> fix the issues
# If you would like to prevent issues found during reflection from appearing again,
# ask Claude to extract resolution strategies and save the insights to project memory
> /reflexion:memorize
