harness · market
Harness
Put raw intelligence to work.
Skills, MCP servers, prompts, assistants and connectors. Every listing shows its author, version and the permissions it needs.
On the shelves21,000
- MCP servers18,849
- Skills1,282
- Assistants651
- Prompts218
0 items
TestingSpecialist assistants, also called subagents. Installed in Claude Code, Codex and the like, they take on the work their main session hands them.
- E2E Test Runneraffaan-m 275kEnd-to-end testing specialist using Vercel Agent Browser (preferred) with Playwright fallback. Manages test journeys, quarantines flaky tests, uploads artifacts (screenshots, videos, traces), and ensures critical user flows work.SonnetBrowser automationCloudTesting
- FastAPI revieweraffaan-m 275kReviews FastAPI applications for async correctness, dependency injection, Pydantic schemas, security, OpenAPI quality, testing, and production readiness.SonnetSecurityTestingBackend
- Agent SDK verifier TSanthropics· agent-sdk-dev 38kUse this agent to verify that a TypeScript Agent SDK application is properly configured, follows SDK best practices and documentation recommendations, and is ready for deployment or testing. This agent should be invoked after a TypeScript Agent SDK app has been created or modified.SonnetDocumentationDevOpsTesting
- Performance Benchmarkermsitarzewski 158kExpert performance testing and optimization specialist focused on measuring, analyzing, and improving system performance across all applications and infrastructureTesting
- Accessibility expertwshobson· ui-design 40kExpert accessibility specialist ensuring WCAG compliance, inclusive design, and assistive technology compatibility. Masters screen reader optimization, keyboard navigation, and a11y testing methodologies.Same as sessionTestingLegal
- Incident response test automatorwshobson· incident-response 40kCreates comprehensive test suites including unit, integration, regression, and security tests. Validates fixes with full coverage and cross-environment testing.SonnetSecurityTesting
- Ad Creative Strategistmsitarzewski 158kPaid media creative specialist focused on ad copywriting, RSA optimization, asset group design, and creative testing frameworks across Google, Meta, Microsoft, and programmatic platforms. Bridges the gap between performance data and persuasive messaging.TestingWriting
- UX Researchermsitarzewski 158kExpert user experience researcher specializing in user behavior analysis, usability testing, and data-driven design insights. Provides actionable research findings that improve product usability and user satisfactionTestingDesignResearch
- Agent SDK verifier pyanthropics· agent-sdk-dev 38kUse this agent to verify that a Python Agent SDK application is properly configured, follows SDK best practices and documentation recommendations, and is ready for deployment or testing. This agent should be invoked after a Python Agent SDK app has been created or modified.SonnetDocumentationDevOpsTesting
- QA Agentwshobson· ship-mate 40kQA Agent. Tests all acceptance criteria and edge cases from orchestrator-output.md. Generates a structured qa-report.md with pass/fail per criterion and bug triage. Loops back to implement if bugs found (max 2 iterations).SonnetTesting
- Evidence Collectormsitarzewski 158kScreenshot-obsessed, fantasy-allergic QA specialist - Reports reproducible issues with evidence and marks untested scope honestlyTesting
- API Testermsitarzewski 158kExpert API testing specialist focused on comprehensive API validation, performance testing, and quality assurance across all systems and third-party integrationsTesting
- Test Automation Engineermsitarzewski 158kExpert end-to-end test automation engineer for Playwright and Cypress — resilient selectors, flake elimination, isolated test data, CI parallelization, and trace-driven failure debugging.Browser automationTestingCoding
- TDD orchestratorwshobson· backend-development 40kMaster TDD orchestrator specializing in red-green-refactor discipline, multi-agent workflow coordination, and comprehensive test-driven development practices. Enforces TDD best practices across teams with AI-assisted testing and modern frameworks.OpusTestingCodingAgents
- CEO Advisoralirezarezvani 28kStrategic leadership advisor for CEOs covering vision, strategy, board management, investor relations, and organizational culture. Use when a founder or CEO faces a company-level strategic decision — e.g., preparing the narrative and metrics for a quarterly board meeting, or stress-testing a pivot or market-expansion decision against vision, runway, and stakeholder expectations.Opus1 skillMonitoringTesting
- Internationalization Engineermsitarzewski 158kExpert i18n engineer for ICU MessageFormat, CLDR plural rules, RTL and bidirectional layouts, locale-aware date/number/currency formatting, string extraction pipelines, and pseudo-localization testing.TestingTranslation
- Backend development test automatorwshobson· backend-development 40kCreate comprehensive test suites including unit, integration, and E2E tests. Supports TDD/BDD workflows. Use for test creation during feature development.SonnetTestingBackend
- Test Results Analyzermsitarzewski 158kExpert test analysis specialist focused on comprehensive test result evaluation, quality metrics analysis, and actionable insight generation from testing activitiesMonitoringTesting
- Firmware analystwshobson· reverse-engineering 40kExpert firmware analyst specializing in embedded systems, IoT security, and hardware reverse engineering. Masters firmware extraction, analysis, and vulnerability research for routers, IoT devices, automotive systems, and industrial controllers.OpusSecurityTestingResearch
- Performance engineerwshobson· application-performance 40kExpert performance engineer specializing in modern observability, application optimization, and scalable system performance. Masters OpenTelemetry, distributed tracing, load testing, multi-tier caching, Core Web Vitals, and performance monitoring. Handles end-to-end optimization, real user monitoring, and scalability patterns.Same as sessionMonitoringTesting
- Model QA Specialistmsitarzewski 158kIndependent model QA expert who audits ML and statistical models end-to-end - from documentation review and data reconstruction to replication, calibration testing, interpretability analysis, performance monitoring, and audit-grade reporting.DocumentationMonitoringTesting
- Workflow Architectmsitarzewski 158kWorkflow design specialist who maps complete workflow trees for every system, user journey, and agent interaction — covering happy paths, all branch conditions, failure modes, recovery paths, handoff contracts, and observable states to produce build-ready specs that agents can implement against and QA can test against.TestingMaps and placesArchitecture
- Prompt Engineermsitarzewski 158kSpecialist in crafting, testing, and systematically optimizing prompts for LLMs — turning vague instructions into reliable, production-grade AI behaviors.Medium riskTestingAI models
- Playwright Test Agentwshobson· ship-mate 40kPlaywright testing agent. Only runs for FRONTEND tasks. Verifies acceptance criteria in a real browser using the page object pattern. Passes on success, routes back to developer on failure.SonnetBrowser automationTestingFrontend