Agent Tester

This is a QA specialist agent that handles the full testing pyramid from unit tests through E2E. It automatically detects your test framework (Jest, Vitest) and can run comprehensive test suites covering edge cases, performance benchmarks, and security validation. The hooks will give you test summaries on completion. What I like here is the practical test templates for common scenarios like concurrent operations and XSS prevention, plus the MCP memory integration that lets it share test results with other agents in your swarm. Coverage targets are set at 80% across the board. If you're building with multiple agents and need one dedicated to quality assurance, this handles the validation layer while your coder agent focuses on implementation.