About
The core-tester skill is a QA specialist agent that performs comprehensive testing including unit, integration, E2E, performance, and security testing. It helps developers ensure code quality by running tests, analyzing results, and identifying issues across the testing pyramid. Use it when you need automated test execution, quality validation, or performance benchmarking for your codebase.
Quick Install
Claude Code
Recommendednpx skills add majiayu000/claude-skill-registry -a claude-code/plugin add https://github.com/majiayu000/claude-skill-registrygit clone https://github.com/majiayu000/claude-skill-registry.git ~/.claude/skills/core-testerCopy and paste this command in Claude Code to install this skill
GitHub Repository
Frequently asked questions
What is the core-tester skill?
core-tester is a Claude Skill by majiayu000. Skills package instructions and resources that Claude loads on demand, so Claude can perform core-tester-related tasks without extra prompting.
How do I install core-tester?
Use the install commands on this page: add core-tester to Claude Code as a plugin, or clone its repository into your skills directory, then restart Claude so it picks up the skill.
What category does core-tester belong to?
core-tester is in the workspace-hub category, tagged testing.
Is core-tester free to use?
Yes. core-tester is listed on AIMCP and free to install. It runs inside Claude, so no separate service account is required to use the skill itself.
Related Skills
The core-planner skill is a strategic agent that decomposes complex tasks into actionable execution plans with dependency analysis and timeline estimation. It's designed for developers needing structured breakdowns before implementation, working alongside coding and testing skills. Key capabilities include task orchestration, risk assessment, and resource allocation using workspace tools.
The core-reviewer skill performs automated code reviews focusing on quality, security, and maintainability. It analyzes code for best practices, performance issues, and documentation quality using tools like security audits and GitHub repository analysis. Use this skill when you need comprehensive code quality assurance before merging or deploying changes.
Core Researcher is a specialized Claude agent for deep technical investigation and information gathering in software projects. It excels at pattern analysis, documentation research, and knowledge synthesis using tools like code analysis, web search, and repository exploration. Use this skill when you need thorough research on dependencies, codebases, or technical topics before implementation.
The claude-reflection skill enables Claude to autonomously learn from user interactions by detecting corrections, capturing preferences, and extracting patterns. It automatically triggers to persist knowledge across sessions using a Reflect-Abstract-Generalize-Store loop. Developers can manually trigger it with `/claude-reflection` or review captured learnings in `~/.claude/memory/learnings.yaml`.