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testing-plugin

v3.19.7

Test execution, TDD workflow, testing strategies, and quality analysis

Claude Code17 Skills

By Lauri GatesLicense: MIT58 GitHub starsUpdated last week

Directory evidence

Runtimes
Claude Code
Parsed components
17 skill or MCP entries
Source updated
Sep 15, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install testing-plugin for Claude Code

Installs for the current user
claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install testing-plugin@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/laurigates/claude-plugins

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is testing-plugin/.

Plugin files

testing-plugin/
├── .claude-plugin/plugin.json
├── skills/mutation-testing/SKILL.md
├── skills/odiff-image-diffing/SKILL.md
├── skills/playwright-cli/SKILL.md
├── skills/playwright-testing/SKILL.md
├── skills/property-based-testing/SKILL.md
├── skills/test-analyze/SKILL.md
├── skills/test-consult/SKILL.md
├── skills/test-focus/SKILL.md
├── skills/test-full/SKILL.md
├── skills/test-quality-analysis/SKILL.md
├── skills/test-quick/SKILL.md
├── skills/test-report/SKILL.md
├── skills/test-run/SKILL.md
├── skills/test-setup/SKILL.md
├── skills/test-strategy-review/SKILL.md
├── skills/test-tier-selection/SKILL.md
└── skills/vitest-testing/SKILL.md

Included Skills17

mutation-testingskills/mutation-testing/SKILL.md

Mutation testing with Stryker (TS/JS) and mutmut (Python). Use when finding weak tests that pass on mutated code, or improving test quality through mutation analysis.

odiff-image-diffingskills/odiff-image-diffing/SKILL.md

odiff pixel-by-pixel image diffing. Use when comparing screenshots, detecting visual regressions, diffing before/after PNGs, asserting golden images.

playwright-cliskills/playwright-cli/SKILL.md

Playwright CLI browser automation — navigate, screenshot, fill forms, click. Use when automating browser tasks from the shell; 4-10x more token-efficient than Playwright MCP.

playwright-testingskills/playwright-testing/SKILL.md

Playwright E2E testing — cross-browser, visual regression, API testing, mobile emulation. Use when writing E2E tests or setting up automated UI testing for web apps.

property-based-testingskills/property-based-testing/SKILL.md

Property-based testing with fast-check (TS/JS) and Hypothesis (Python). Use when generating test data, finding edge cases, testing properties, or writing QuickCheck-style tests.

test-analyzeskills/test-analyze/SKILL.md

Analyze test results and create a fix plan with subagents. Use when triaging failing tests, analyzing JUnit XML, planning fixes for accessibility/security, or categorizing flaky/E2E failures.

test-consultskills/test-consult/SKILL.md

Consult the test-architecture agent for strategy decisions. Use when asking about coverage gaps, test pyramid, framework selection, flaky-test remediation, or how to test X.

test-focusskills/test-focus/SKILL.md

One test file, fail-fast — Playwright, Vitest, Jest, pytest, cargo, go test. Use when running a single spec file, headed/debug mode, or serial single-worker WebGL tests.

test-fullskills/test-full/SKILL.md

Every tier in pyramid order — unit, then integration, then E2E. Use when running all tests before a PR or commit, or generating a coverage report.

test-quality-analysisskills/test-quality-analysis/SKILL.md

Detect test smells, overmocking, flaky tests, and coverage issues. Use when reviewing tests, improving test quality, or analyzing test effectiveness and reliability.

test-quickskills/test-quick/SKILL.md

Unit tier only — skips slow, integration, and E2E tests for sub-30s feedback. Use when checking units after a change, running tests affected since the last commit, or unit watch mode.

test-reportskills/test-report/SKILL.md

Cached results from the last test run, no re-run — pass/fail counts, existing coverage report, history, flaky tests. Use when asked for current test status or standup health.

test-runskills/test-run/SKILL.md

Run the project's tests — auto-detects pytest, vitest, jest, cargo, go test; whole suite or a name pattern. Use when asked to run the tests and no tier, single file, or fix cycle is named.

test-setupskills/test-setup/SKILL.md

Configure testing infrastructure with CI/CD. Use when setting up tests, scaffolding test dirs, adding pre-commit hooks, GitHub Actions workflows, Codecov, or coverage badges.

test-strategy-reviewskills/test-strategy-review/SKILL.md

Evaluate whether a test suite actually tests what it aims to, using an adversarial pass plus a tests-hidden cold read, then verify every finding against the code. Use when a suite is green but you doubt it would catch a real regression.

test-tier-selectionskills/test-tier-selection/SKILL.md

Decide which test tier a change needs — unit, integration, or E2E — from its scope; runs nothing itself. Use when deciding how much of the suite to run after a change.

vitest-testingskills/vitest-testing/SKILL.md

Vitest test runner — Vite-native, ESM, watch/UI mode, coverage, mocking, snapshots. Use when setting up tests for Vite projects, migrating from Jest, or needing fast execution.

Plugin manifests1

testing-plugin/.claude-plugin/plugin.json
{
  "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
  "name": "testing-plugin",
  "version": "3.19.7",
  "description": "Test execution, TDD workflow, testing strategies, and quality analysis",
  "author": {
    "name": "Lauri Gates"
  },
  "repository": "https://github.com/laurigates/claude-plugins",
  "license": "MIT",
  "keywords": [
    "testing",
    "tdd",
    "test-driven-development",
    "pytest",
    "vitest",
    "coverage",
    "test-runner",
    "playwright",
    "playwright-cli",
    "browser-automation",
    "odiff",
    "image-diff",
    "visual-regression"
  ]
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[testing-plugin on Agent Plugins Marketplace](https://pluginsmp.com/plugins/testing-plugin)