By testland
Browser + OS compatibility testing + self-hosted grid: 5 skills (browser-matrix-runner, os-matrix-runner, compatibility-budget, selenium-grid-4-runner, browser-matrix-strategy-reference).
Pure-reference catalog for designing a browser / OS / device test matrix. Defines the tiered-matrix model (T1 = must-pass-every-PR; T2 = pre-release; T3 = quarterly), explains how to select tiers based on traffic share (StatCounter / MDN browser-compat-data / web-platform.org), discusses the trade-off between bundled-engine + cloud-grid + real-device dimensions, and provides a worked matrix template. Use as the strategy reference before configuring browserstack-automate / saucelabs-automate / lambdatest-automate / selenium-grid-4-runner / playwright-cross-browser.
Pure-reference for choosing the compatibility matrix - defines tier-1 (must work; covered per-PR) vs tier-2 (must work; covered nightly) vs tier-3 (should work; covered pre-release) vs unsupported (explicitly out of scope). Includes example budgets per product type (web / desktop / mobile / library), the matrix-size cost / coverage trade-off, and templates for documenting "what we support" externally. Use when a team needs to decide which browser / OS / runtime combinations to commit to.
Configures a CI matrix that runs tests across operating systems (Linux / macOS / Windows) and runtime versions (Node 18/20/22; Python 3.10/3.11/3.12; Java 17/21; .NET 6/8). Wires GitHub Actions matrix syntax, addresses OS-specific quirks (path separators, line endings, file permissions). Use when the product ships across OS / runtime combinations and the team needs continuous cross-platform coverage.
Author and operate Selenium Grid 4 - self-hosted distributed WebDriver. Covers the six-component architecture (Router / Distributor / Session Map / Event Bus / New Session Queue / Node), standalone vs hub-and-node deployment modes, Docker-image stack (selenium/standalone-chrome, selenium/hub, selenium/node-chrome), node registration, session-queue tuning, and observability. Use for self-hosted cross-browser testing - alternative to cloud grids (BrowserStack / Sauce Labs / LambdaTest) when data residency or cost-control require an on-prem solution.
Configures a CI matrix that runs the smoke / regression suite across multiple browsers per Playwright's three-engine support (Chromium, Firefox, WebKit) plus branded variants (chrome, msedge channels). Wires GitHub Actions / GitLab CI matrix syntax, captures per-browser screenshots, and aggregates per-browser pass/fail. Use when the product targets multiple browsers and the team wants automated cross-browser regression.
Based on adoption, maintenance, documentation, and repository signals. Not a security audit or endorsement.
A rigorously curated quality-engineering plugin marketplace for Claude Code. 77 plugins, 695 components, every one rating-gated before merge.
d6 floordocs/REVIEWER_TRAINING.mdSee Quality bar and docs/REVIEWER_CHECKLIST.md.
The marketplace ships three kinds of building block:
qa-api-testing, qa-load-testing). You install only the plugins your
stack needs.great-expectations,
oauth-flow-test-author). Claude loads a skill when your request matches
its trigger; you can also ask for it by name.schema-diff-reviewer reviews a migration diff and returns a findings
table). An agent may preload one or more skills to do its work.Installed components stay dormant until a matching task comes up, so adding a plugin doesn't add noise — it adds capability that activates on demand.
/plugin marketplace add testland/qa
/plugin install <plugin-name>@testland-qa
For example:
/plugin install qa-data-quality@testland-qa
/plugin marketplace add https://github.com/testland/qa
git clone https://github.com/testland/qa ~/.claude/marketplaces/testland-qa
Before you install: plugins run inside your Claude Code session and ship agent instructions and tool wrappers. Anthropic doesn't vet marketplace contents — review a plugin's components before installing it into a sensitive project. Every component here is rating-gated (see Quality bar), but you remain in control of what runs.
New to the marketplace? Install one or two plugins for your role rather than everything — components activate on demand, so a focused set keeps things sharp.
| If you're a… | Try first |
|---|---|
| Manual / exploratory tester | qa-manual-testing · qa-bdd · qa-bug-repro |
| Test automation engineer | qa-web-e2e · qa-api-testing · qa-unit-tests-js |
| Performance engineer | qa-load-testing · qa-chaos-resilience |
| Security tester | qa-sast · qa-secrets · qa-dast |
| Lead / manager / head of quality | qa-roles · qa-test-management · qa-process |
The full catalog is below; for versions and component counts see
CATALOG.md.
Once a plugin is installed, its skills and agents are available to Claude
Code — invoke them by describing the task in plain language. Example with
qa-data-quality:
/plugin install qa-data-quality@testland-qa
great-expectations skill scaffolds an ExpectationSuite + Checkpoint and
wires the results into a CI gate.schema-diff-reviewer agent returns a Critical / Warning / Info findings
table covering breaking-vs-additive changes and downstream impact.Each plugin's README.md lists its skills and agents and what each one does.
Visual regression testing: 7 skills (percy-visual-regression-testing, chromatic-visual-regression-testing, playwright-snapshots, storybook-visual-regression-testing, responsive-breakpoint-runner, visual-baseline-conventions, visual-baseline-gate) and 2 agents (visual-diff-classifier, visual-baseline-curator).
Contract testing for microservices: 5 skills (pact-contract-testing, openapi-contract-diff, graphql-schema-regression, protobuf-compat-checking, contract-compatibility-gate) and 2 agents (contract-drift-investigator, contract-test-scaffolder).
Flake triage: 2 skills (flaky-test-quarantine, flake-pattern-reference) and 5 agents (e2e-flake-bisector, parallel-isolation-checker, regression-bisector, ai-flake-detector, e2e-test-trend-reporter).
Bug reproduction workflow: 1 skill (bug-report-template) and 8 agents (bug-report-from-recording, bug-repro-builder, crash-stack-trace-analyzer, defect-clusterer, defect-trend-narrator, escape-defect-analyzer, failure-classifier, test-failure-debugger).
Data quality testing for analytical pipelines: 5 skills (dbt-testing, great-expectations, soda-checks, data-quality-gate, data-quality-conventions) and 2 agents (schema-diff-reviewer, data-anomaly-triager).
npx claudepluginhub testland/qa --plugin qa-compatibilityUnity Development Toolkit - Expert agents for scripting/refactoring/optimization, script templates, and Agent Skills for Unity C# development
Comprehensive .NET development skills for modern C#, ASP.NET, MAUI, Blazor, Aspire, EF Core, Native AOT, testing, security, performance optimization, CI/CD, and cloud-native applications
Modern R development skills for Claude Code - tidyverse patterns, rlang metaprogramming, Bayesian inference, performance optimization, and more
Complete creative writing suite with 10 specialized agents covering the full writing process: research gathering, character development, story architecture, world-building, dialogue coaching, editing/review, outlining, content strategy, believability auditing, and prose style/voice analysis. Includes genre-specific guides, templates, and quality checklists.
Complete collection of battle-tested Claude Code configs from an Anthropic hackathon winner - agents, skills, hooks, and rules evolved over 10+ months of intensive daily use
Comprehensive SEO analysis plugin for Claude Code. 25 sub-skills (21 core + 1 orchestrator + 1 framework + 2 extension mirrors) and 18 sub-agents cover technical SEO, content quality, schema, sitemaps, Core Web Vitals, local SEO, backlinks, AI/GEO, ecommerce, hreflang, SXO, clustering, drift monitoring, and Google APIs. Includes optional MCP extensions, SPA-aware rendering, portability, and hardened SSRF/DNS-rebinding safe fetchers.
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