A Claude Code plugin of context engineering techniques and patterns for better agent results, with skills, agents and commands for prompt engineering, agent evaluation, task drafting, and problem analysis. Aimed at developers who want more predictable agent output.
Claude Code
> /plugin marketplace add NeoLabHQ/context-engineering-kit
Codex
$ npx skills add NeoLabHQ/context-engineering-kit --skill actualize add-task agent-evaluation analyse-problem analyse analyze-issue apply-anthropic-skill-best-practices attach-review-to-pr brainstorm build-mcp cause-and-effect commit context-engineering create-agent create-command create-hook create-ideas create-pr create-rule create-skill create-workflow-command critique decay design-testing-strategy do-and-judge do-competitively do-in-parallel do-in-steps fix-tests git-notes git-worktrees implement-task judge-with-debate judge kaizen launch-sub-agent load-issues load-pr-comments memorize multi-agent-patterns plan-do-check-act plan-task prompt-engineering propose-hypotheses query reflect reset resolve-fixed-pr-comments review-local-changes review-pr root-cause-tracing setup-arxiv-mcp setup-codemap-cli setup-context7-mcp setup-serena-mcp status subagent-driven-development test-coverage test-driven-development test-prompt test-skill thought-based-reasoning traiage-review tree-of-thoughts update-docs why write-concisely write-tests -a codex
Cursor
$ npx skills add NeoLabHQ/context-engineering-kit --skill actualize add-task agent-evaluation analyse-problem analyse analyze-issue apply-anthropic-skill-best-practices attach-review-to-pr brainstorm build-mcp cause-and-effect commit context-engineering create-agent create-command create-hook create-ideas create-pr create-rule create-skill create-workflow-command critique decay design-testing-strategy do-and-judge do-competitively do-in-parallel do-in-steps fix-tests git-notes git-worktrees implement-task judge-with-debate judge kaizen launch-sub-agent load-issues load-pr-comments memorize multi-agent-patterns plan-do-check-act plan-task prompt-engineering propose-hypotheses query reflect reset resolve-fixed-pr-comments review-local-changes review-pr root-cause-tracing setup-arxiv-mcp setup-codemap-cli setup-context7-mcp setup-serena-mcp status subagent-driven-development test-coverage test-driven-development test-prompt test-skill thought-based-reasoning traiage-review tree-of-thoughts update-docs why write-concisely write-tests -a cursor
Gemini CLI
$ npx skills add NeoLabHQ/context-engineering-kit --skill actualize add-task agent-evaluation analyse-problem analyse analyze-issue apply-anthropic-skill-best-practices attach-review-to-pr brainstorm build-mcp cause-and-effect commit context-engineering create-agent create-command create-hook create-ideas create-pr create-rule create-skill create-workflow-command critique decay design-testing-strategy do-and-judge do-competitively do-in-parallel do-in-steps fix-tests git-notes git-worktrees implement-task judge-with-debate judge kaizen launch-sub-agent load-issues load-pr-comments memorize multi-agent-patterns plan-do-check-act plan-task prompt-engineering propose-hypotheses query reflect reset resolve-fixed-pr-comments review-local-changes review-pr root-cause-tracing setup-arxiv-mcp setup-codemap-cli setup-context7-mcp setup-serena-mcp status subagent-driven-development test-coverage test-driven-development test-prompt test-skill thought-based-reasoning traiage-review tree-of-thoughts update-docs why write-concisely write-tests -a gemini-cli
GitHub Copilot
$ npx skills add NeoLabHQ/context-engineering-kit --skill actualize add-task agent-evaluation analyse-problem analyse analyze-issue apply-anthropic-skill-best-practices attach-review-to-pr brainstorm build-mcp cause-and-effect commit context-engineering create-agent create-command create-hook create-ideas create-pr create-rule create-skill create-workflow-command critique decay design-testing-strategy do-and-judge do-competitively do-in-parallel do-in-steps fix-tests git-notes git-worktrees implement-task judge-with-debate judge kaizen launch-sub-agent load-issues load-pr-comments memorize multi-agent-patterns plan-do-check-act plan-task prompt-engineering propose-hypotheses query reflect reset resolve-fixed-pr-comments review-local-changes review-pr root-cause-tracing setup-arxiv-mcp setup-codemap-cli setup-context7-mcp setup-serena-mcp status subagent-driven-development test-coverage test-driven-development test-prompt test-skill thought-based-reasoning traiage-review tree-of-thoughts update-docs why write-concisely write-tests -a github-copilot
OpenCode
$ npx skills add NeoLabHQ/context-engineering-kit --skill actualize add-task agent-evaluation analyse-problem analyse analyze-issue apply-anthropic-skill-best-practices attach-review-to-pr brainstorm build-mcp cause-and-effect commit context-engineering create-agent create-command create-hook create-ideas create-pr create-rule create-skill create-workflow-command critique decay design-testing-strategy do-and-judge do-competitively do-in-parallel do-in-steps fix-tests git-notes git-worktrees implement-task judge-with-debate judge kaizen launch-sub-agent load-issues load-pr-comments memorize multi-agent-patterns plan-do-check-act plan-task prompt-engineering propose-hypotheses query reflect reset resolve-fixed-pr-comments review-local-changes review-pr root-cause-tracing setup-arxiv-mcp setup-codemap-cli setup-context7-mcp setup-serena-mcp status subagent-driven-development test-coverage test-driven-development test-prompt test-skill thought-based-reasoning traiage-review tree-of-thoughts update-docs why write-concisely write-tests -a opencode
Windsurf
$ npx skills add NeoLabHQ/context-engineering-kit --skill actualize add-task agent-evaluation analyse-problem analyse analyze-issue apply-anthropic-skill-best-practices attach-review-to-pr brainstorm build-mcp cause-and-effect commit context-engineering create-agent create-command create-hook create-ideas create-pr create-rule create-skill create-workflow-command critique decay design-testing-strategy do-and-judge do-competitively do-in-parallel do-in-steps fix-tests git-notes git-worktrees implement-task judge-with-debate judge kaizen launch-sub-agent load-issues load-pr-comments memorize multi-agent-patterns plan-do-check-act plan-task prompt-engineering propose-hypotheses query reflect reset resolve-fixed-pr-comments review-local-changes review-pr root-cause-tracing setup-arxiv-mcp setup-codemap-cli setup-context7-mcp setup-serena-mcp status subagent-driven-development test-coverage test-driven-development test-prompt test-skill thought-based-reasoning traiage-review tree-of-thoughts update-docs why write-concisely write-tests -a windsurf
Advanced context engineering techniques and patterns for Claude Code, OpenCode, Cursor, Antigravity and more.
Quick Start · Plugins · Github Action · Reference · Docs
A 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 our company's developers have used daily for a long time, supplemented by plugins from benchmarked papers and high-quality projects.
Updates from key releases:
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.
Gemini CLI
Install the extension directly from the repository:
gemini extensions install https://github.com/NeoLabHQ/context-engineering-kit
Note: This installs every plugin's skills and agents as a single bundle — there's no per-plugin selection like Claude Code's. Unfortunately, Gemini CLI does not support per-plugin selection. But you can delete skills and agents that you don't need, after installation.
Antigravity CLI
Install the plugin directly from the repository's antigravity/ folder — Gemini CLI is not required:
agy plugin install https://github.com/NeoLabHQ/context-engineering-kit/antigravity
Note: This installs every plugin's skills and agents as a single bundle — there's no per-plugin selection like Claude Code's. Unfortunately, Antigravity CLI does not support per-plugin selection. But you can delete skills and agents that you don't need, after installation.
Cursor, 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 to install.
Note: Each provider uses its own agent format and npx skills does not support subagents, so this installation method won't provide the full experience.
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
> claude "implement user authentication"
# Claude implements user authentication, then you can ask it to reflect on implementation
> /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
> /memorize
Alternatively, you can use the reflect word in the initial prompt:
> claude "implement user authentication, then reflect"
# Claude implements user authentication,
# then hook automatically runs /reflect
In order to use this hook, you need to have bun installed. However, it is not required for the overall command.
You can find the complete Context Engineering Kit documentation here.
However, the main plugins we recommend starting with are Subagent-Driven Development and Spec-Driven Development.
The three plugins in this marketplace are designed to improve how accurately and consistently the agent follows provided instructions and to reduce hallucinations and bias toward incorrect solutions. They are not competitors but rather complementary to each other, because they allow you to balance reliability vs. token cost. Here is a high-level comparison of different agent usage approaches and the probability of receiving results that are fully accurate and include zero hallucinations, based on task complexity:
Reliability metrics are based on more than year of real development usage on production projects.
To view all available plugins:
/plugin
Stars on GitHub
See 12 context-engineering-kit alternatives
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@facebookInstall it with the command on its page. It includes actualize, add-task, agent-evaluation. Its skills do not fire on their own yet. Free and open source.
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