Testing

18,217 mods in this category, of every kind an agent can take. Each one carries what it costs per session, what the scan found, and whether it is the original.

llm-evaluation

313

stefan-jansen/claude-code-toolkit

Skill Claude CodeCodex

LLM evaluation and testing patterns including prompt testing, hallucination detection, benchmark creation, and quality metrics. Use when testing LLM applications, validating prompt quality, implementing systematic evaluation, or measuring LLM performance.

not rated 86 +1 2mo ago A 47 tokens original MIT

test-generator

314

AIDotNet/MoYuCode

Skill Claude CodeCodex

A test-writing assistant that creates automated checks for code, including unit, integration, and end-to-end tests. It supports common test tools such as Jest, Vitest, pytest, and xUnit.

not rated 85 +1 7mo ago A 37 tokens original MIT

score-eval

315

neondatabase/agent-skills

Skill Claude Code ✓ vendor

Score the eval diff at $ARGUMENTS against the eval rubric.

not rated 85 yesterday A 3 tokens original Apache-2.0

har-workflow

316

os-factory/har

Cursor rule Cursor

HAR harness workflow — read AGENTS.md before changing anything.

not rated 85 2d ago A 132 tokens original Apache-2.0

quality-playbook

317

andrewstellman/quality-playbook

Skill Claude CodeCodex

Run a complete quality engineering audit on any codebase. Derives behavioral requirements from the code, generates spec-traced functional tests, runs a three-pass code review with regression tests, executes a multi-model spec audit (Council of Three), and produces a consolidated bug report with TDD-verified patches.…

not rated 83 2d ago A 111 tokens original Apache-2.0

branchbox/branchbox

Skill Codex

Use when modifying BranchBox devcontainer/bootstrap workflows, compose templates, feature env-stash behavior, or manual E2E harness/release docs. Apply issue.

not rated 83 +2 yesterday A 39 tokens original MIT

gsd-verifier

319

itsjwill/gsd-pro

Agent Claude Code

Verifies phase goal achievement through goal-backward analysis. Checks codebase delivers what phase promised, not just that tasks completed. Creates VERIFICATION.md report.

not rated 82 +1 5mo ago A 36 tokens original MIT

msw-cli

320

JasonBoy/msw-mcp

Skill Claude CodeCodex

Control MSW mocks at runtime via msw-cli (open session, add/update/remove handlers). Use when mocking APIs, changing mock responses, or debugging MSW without restarting the app.

not rated 81 2mo ago A 41 tokens original MIT

swift-testing

321

bocato/swift-testing-agent-skill

Skill Claude CodeCodex

Expert guidance on Swift Testing best practices, patterns, and implementation. Use when developers mention: (1) Swift Testing, @Test, #expect, #require, or @Suite, (2) "use Swift Testing" or "modern testing patterns", (3) test doubles, mocks, stubs, spies, or fixtures, (4) unit tests, integration tests, or snapshot…

not rated 80 +1 7mo ago A 124 tokens original MIT

testany-bot

322

TestAny-io/testany-agent-skills

Plugin Claude Code

Bundles 10 skills, 8 commands · 503 tokens together

A plugin that connects a coding agent to Testany, a platform for creating, organizing, starting, monitoring, and diagnosing automated tests. It bundles commands for cases, pipelines, triggers, executions, and failures.

not rated 80 9d ago A tokens not measured original MIT

tauri-pilot

323

mpiton/tauri-pilot

Skill Claude CodeCodex

Inspect, interact with, and test a running Tauri v2 app via CLI. Communicates over Unix socket using JSON-RPC 2.0. Use when testing UI, automating interactions, or debugging a Tauri app.

not rated 79 +2 7d ago B 52 tokens original MIT

browser-tester-v2

324

lipas-liikuntapaikat/lipas

Agent Claude Code

Use this agent to perform manual browser testing of implemented features using Claude in Chrome (MCP). Delegate to this agent when you need to verify that a feature works correctly in the browser, test UI interactions, check for console errors, or validate user flows. Provide context about what was implemented and…

not rated 78 yesterday A 69 tokens original MIT

review

325

lkimuk/Wuwe

Skill Claude CodeCodex

Review the supplied artifact for correctness, security, maintainability, and test coverage. Report concrete findings before general suggestions, and distinguish verified defects from risks.

not rated 78 +1 3d ago A 0 tokens original Apache-2.0

add-handler

326

MuhammadUsmanGM/claude-code-best-practices

Skill Claude Code

Scaffold a new HTTP handler with service function, store method (if needed), and table-driven test, following the project's internal/{api,service,store} layout. Invoke when the user asks to add an endpoint, handler, or route.

not rated 78 +2 2mo ago A 52 tokens original MIT

test-writer

327

kivo360/OmoiOS

Skill Claude CodeCodex

Generate comprehensive tests including unit, integration, and property-based tests.

not rated 76 +1 2mo ago A 12 tokens original Apache-2.0

ChuckSRQ/awesome-hermes-skills

Skill Claude CodeCodex

Run behavioral benchmarks against the agent, detect failure patterns, generate guidance patches, apply them with auto-revert safety net. Implements the closed-loop self-improvement cycle from Hermes PR.

not rated 75 4mo ago A 41 tokens original MIT

paperclip

329

IncomeStreamSurfer/paperclip-surfers

Skill Claude CodeCodex

Interact with the Paperclip control plane API to manage tasks, coordinate with other agents, and follow company governance. Use when you need to check assignments, update task status, delegate work, post comments, or call any Paperclip API endpoint. Do NOT use for the actual domain work itself (writing code, research…

not rated 74 5mo ago A 75 tokens original MIT

system-control

330

iammm0/secbot

Skill Claude CodeCodex

Comprehensive system control operations for security testing. Use this skill when you need unified access to file operations, process management, system information, and command execution through a single interface during authorized penetration testing.

not rated 73 4d ago A 43 tokens

playwright

331

transloadit/node-sdk

Cursor rule Cursor

Playwright e2e guidelines distilled from PR.

not rated 73 3d ago A 0 tokens original MIT

pre-release-check

332

willdady/platypus

Skill Claude Code

The final gate before a release is cut — go green, reconcile the release PR against what actually landed, sweep what CI can't see, check the roadmap and ADR statuses, optionally deep-review, then return a ship-or-hold verdict.

not rated 72 +3 2d ago A 51 tokens original MIT

misata

334

rasinmuhammed/misata

Skill Claude CodeCodex

Generate realistic multi-table test data, seed a development database, or build fixtures whose joins and totals actually hold. Use when the user needs test data, sample data, demo data, seed data, fixtures, a populated dev/staging database, or a relational dataset shaped to specific numbers (a revenue curve, a churn…

not rated 68 today A 90 tokens original MIT

zentao-api

335

easysoft/zentao-skills

Skill Claude CodeCodex

A way to work with ZenTao, a project-management and software-testing system, through its REST API. It covers projects, products, requirements, bugs, tasks, tests, releases, users, files, and other records.

not rated 68 23d ago A 124 tokens original MIT

moai-workflow-testing

336

modu-ai/cc-plugins

Skill Claude Code

Comprehensive testing and development workflow specialist combining DDD testing, characterization tests, performance profiling, code review, and quality assurance. Use when writing tests, measuring coverage, creating characterization tests, performing TDD, running CI/CD quality checks, or reviewing pull requests. Do…

not rated 67 6mo ago A 86 tokens

At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: