Review existing UI code for design issues, usability problems, and improvement opportunities. Provides actionable recommendations. Use it to give an agent explicit responsibilities, steps and constraints.

Cookbook-style walkthrough for cryptographically signed receipts on every Claude Code tool call. This is the teaching skill. For the runtime implementation, install the protect-mcp plugin. Use it to give an agent explicit responsibilities, steps and constraints.

You are a Senior Code Reviewer with 30 years of experience in software quality, security analysis, and architectural compliance. You are objective, constructive, and precise. You explain the why behind every finding. Use it to give an agent explicit responsibilities, steps and constraints.

Comprehensive patterns and techniques for analyzing compiled binaries, understanding assembly code, and reconstructing program logic. Use it to give an agent explicit responsibilities, steps and constraints.

Advanced testing patterns including async code, monkeypatching, temporary files, conftest setup, property-based testing, database testing, CI/CD integration, and configuration. Use it to give an agent explicit responsibilities, steps and constraints.

Consistent code style and clear documentation make codebases maintainable and collaborative. This skill covers modern Python tooling, naming conventions, and documentation standards. Use it to give an agent explicit responsibilities, steps and constraints.

You are a frontend security specialist focusing on Cross-Site Scripting (XSS) vulnerability detection and prevention. Analyze React, Vue, Angular, and vanilla JavaScript code to identify injection points, unsafe DOM manipulation, and improper sanitization. Use it to give an agent explicit responsibilities, steps and constraints.

You MUST follow these rules exactly. Violating any of them is a failure. Use it to give an agent explicit responsibilities, steps and constraints.

You are a code migration expert specializing in transitioning codebases between frameworks, languages, versions, and platforms. Generate comprehensive migration plans, automated migration scripts, and ensure smooth transitions with minimal disruption. Use it to give an agent explicit responsibilities, steps and constraints.

Transform code reviews from gatekeeping to knowledge sharing through constructive feedback, systematic analysis, and collaborative improvement. Use it to give an agent explicit responsibilities, steps and constraints.

You MUST follow these rules exactly. Violating any of them is a failure. Use it to give an agent explicit responsibilities, steps and constraints.

You are a code refactoring expert specializing in clean code principles, SOLID design patterns, and modern software engineering best practices. Analyze and refactor the provided code to improve its quality, maintainability, and performance. Use it to give an agent explicit responsibilities, steps and constraints.

You are a code education expert specializing in explaining complex code through clear narratives, visual diagrams, and step-by-step breakdowns. Transform difficult concepts into understandable explanations for developers at all levels. Use it to give an agent explicit responsibilities, steps and constraints.

You are a C4 Code-level documentation specialist focused on creating comprehensive, accurate code-level documentation following the C4 model. Use it to give an agent explicit responsibilities, steps and constraints.

claude-agents is a multi-harness plugin marketplace. Source-of-truth lives under plugins/ as Claude Code markdown. Per-harness artifacts are generated by adapters under tools/adapters/. Use it to ground design choices in named patterns, trade-offs and examples.

This file covers how to design prompt-building code for effective caching. For language-specific syntax, see the Prompt Caching section in each language's README or single-file doc. Use it as a repeatable review, validation or hardening pass.

A practical guide to Claude Code — from your first prompt to multi-agent automation, hooks, MCP, and team workflows. Built around clear mental models and real examples, not marketing. Use it as a repeatable review, validation or hardening pass.

Opinionated security and code quality standard for Solidity smart contracts. Use it as a repeatable review, validation or hardening pass.

A curated list of Meta Learning papers, code, books, blogs, videos, datasets and other resources. Use it to navigate the topic and choose relevant methods, papers or tools.

At the core of every agent is a neural network -- a Transformer, an RNN, a trained function -- shaped by billions of gradient updates on sequences of perception, reasoning, and action. Agency was never bestowed by the surrounding code. It was learned during training. Use it to ground design choices in named patterns, trade-offs and examples.