Testing

20,069 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.

xdd

1105

stagentic/stagentic-xdd

Skill Claude CodeCodex

Use when adding or changing code. New code is created by adhering to TDD discipline.

not rated 5 1mo ago A 20 tokens original MIT

starfleetctl-dev

1106

mpbt-hq/starfleetctl

Skill Claude CodeCodex

Developing and deploying the starfleetctl source itself — claim protocol, make, bootstrap, daemon restarts in the right order, end-to-end verification. Load before editing anything in a starfleetctl source checkout, before running starfleet-bootstrap, or when a web/plugin change 'is done' but the fleet does not see it.

not rated 5 changed 24d ago A 72 tokens AGPL-3.0

write-swift

1107

huangxinxinyu/xinyu-s-skill-set

Skill Claude CodeCodex

How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics (some vs any), API design, performance and ARC, Swift Testing, macros, and the modern language features agents don't know…

not rated 5 1mo ago A 107 tokens

apo

1108

samikuikka/apo

Skill Claude CodeCodex needs its repo

Author and run Apo tasks — executable capability specs for AI agents. Use when writing an apo adapter or task (.eval.ts), defining checks or input files, publishing a task catalog, or running agent tasks and reading PASS/FAIL verdicts with apo task run / apo runs show. Covers the define, execute, verify, improve loop.

not rated 5 +1 yesterday A 69 tokens original MIT

test-hunter

1109

skyosev/agent-skills

Skill Claude Code

Audit Go, Python, or TypeScript tests for whether they can fail — coverage gaps in critical code, tautological tests, inert and weak tests, brittle tests, test double misuse, test setup duplication, flaky test indicators. Defaults to the codebase.

not rated 5 changed yesterday A 55 tokens

kilotest-overview

1110

jrpool/kilotest

Skill Claude CodeCodex

Kilotest uses an ensemble of 12 rule engines to test web pages for front-end quality, including accessibility, usability, and web standards such as HTML, CSS, ARIA, and WCAG. Use when learning which pages have been tested and which reports about test results for a page are available, investigating the reported issues…

not rated 5 changed today A 85 tokens original MIT

argus-test

1111

chriswu727/argus

Skill Claude CodeCodex

Test a web app the user is building with Argus, from setup through verified findings. Use when the user asks to test, QA, or check a running web app or a feature they just built.

not rated 5 +1 changed 2d ago A 45 tokens original MIT

uigraph-gate

1112

kanetran29/uigraph

Skill Claude CodeCodex needs its repo

Use when implementing any feature/bugfix ticket in a repo with the uigraph gate installed (.uigraph/kit/gate.mjs), or when the user says "gate" or gives acceptance criteria for a UI change — runs the verification-gate protocol (contract → RED → implement → GREEN) so done is machine-proven, never claimed.

not rated 5 2d ago A 75 tokens original MIT

dsh-chaos-test

1113

cyanseek/dsh-tool-chaos

Skill Codex

Design, install, run, and report deterministic DeepSeek Harness tool-failure experiments. Use when a user wants to prove retry or fallback behavior, timeout or cooperative cancellation, policy-denial handling, blocked-result recovery, Code Mode nested-call resilience, or CI evidence for a DSH agent/plugin. Complete…

not rated 4 changed 1mo ago B 91 tokens original MIT

webapp-testing

1114

JNZader/repoforge

Skill Claude Code

Browser-based UI verification using Playwright. Page Object Model, selector best practices, visual regression, network interception, and MCP integration. Trigger: When writing E2E tests, verifying UI changes, or setting up Playwright.

not rated 4 1mo ago A 49 tokens original MIT

agent-evaluation

1115

nek1987/auto-agent-harness

Skill Claude Code

Evaluate and improve Claude Code commands, skills, and agents. Use when testing prompt effectiveness, validating context engineering choices, or measuring improvement quality.

not rated 4 7mo ago A 32 tokens

e2e-runner

1116

Bamose/everything-codex-cli

Skill Claude CodeCodex

End-to-end testing specialist using Playwright. Use PROACTIVELY for generating, maintaining, and running E2E tests. Manages test journeys, quarantines flaky tests, uploads artifacts (screenshots, videos, traces), and ensures critical user flows work.

not rated 4 +1 9mo ago A 59 tokens

sniff

1117

Aboudjem/sniff

Plugin Claude Code

Bundles 3 skills, 1 MCP server · 151 tokens together

Autonomous QA scanner via sniff-qa: walks your running app in a real browser and reports real bugs (broken pages/links, console/network errors, broken forms, state-loss, empty/placeholder data, bad loading/error states, responsive + a11y) with reproduction proof, severity, confidence, and a fix. No API key.

not rated 4 changed 2mo ago A tokens not measured original Apache-2.0

temper-skills

1118

CyrilLeMat/temper-skills

Skill Claude Code

Give an agent skill's decision logic a test suite and a deterministic implementation — a labeled validation dataset plus versionable Python — via an adversarial multi-persona loop that runs natively in Claude Code: proposer plus persona subagents through the Task tool, entirely on your Claude Code subscription, no…

not rated 4 2mo ago A 173 tokens original Apache-2.0

craft-skills

1119

mikestangdevs/craft-skills

Plugin Claude Code

Bundles 17 skills · 2,250 tokens together

Skills for code you'll have to live with. Two collections: craft (code that's understandable, named well, lean, loud about failure, and testable — without turning every edit into a rewrite) and rigor (claims you can believe — adversarial testing, full-suite banking, cited numbers, population sweeps, evidence-backed…

not rated 4 5mo ago A tokens not measured original MIT

akirtok/preflight-security-audit

Plugin Claude Code

Bundles 1 skill, 1 command, 6 agents · 979 tokens together

Comprehensive 360 pre-ship audit: 61 checks across security, reliability, performance, AI/LLM, privacy/compliance, and launch readiness — including live-database, serverless/edge, GraphQL, client-side, and modern-attack (Trojan Source) checks. Reports a 0–100 security score with severity-ranked findings and proposes…

not rated 4 3mo ago A tokens not measured original MIT

basteez/java-skills

Skill Claude Code

Generate integration tests for a Java class using Testcontainers. Supports Spring Boot (3.1+), Quarkus (3.0+), and Micronaut (4.0+). Detects class type (repository, controller, service) and applies framework-appropriate test patterns. Requires Java 17+.

not rated 4 7mo ago A 69 tokens

off-by-none

1122

NTCHz/off-by-none

Plugin Claude Code

Bundles 1 skill · 47 tokens together

Spec-faithful implementation: spec-derived tests, mandatory boundary coverage, and an evidence-gated done-report. Every rule TDD-tested against baseline failures on Opus, Sonnet, and Haiku.

not rated 4 3mo ago A tokens not measured original MIT

skill-testing

1123

wangwei1237/agent-skills

Skill Codex

Test Agent Skills from tests/skillcases.yaml files. Use when validating whether a Skill triggers correctly, produces a dry-run plan, satisfies output contracts, handles edge/failure cases, or when asked to run Skill Test cases, judge Agent responses against YAML expectations, or produce Skill test reports.

not rated 4 4mo ago A 61 tokens original Apache-2.0

emmanuelperu/microcks-skills

Skill Claude CodeCodex needs its repo

Write OpenAPI examples that work with Microcks dispatchers for API mocking. Covers example pairing rules, JSON body dispatching, Groovy script dispatching, and dispatcher configuration via the Microcks API.

not rated 4 7mo ago A 47 tokens original Apache-2.0

genesis

1125

gabrieldabbah/genesis

Plugin Claude Code

Bundles 10 skills, 1 hook · 1,280 tokens together

Three modes for Claude Code projects: create a new one from an empty folder (research and design before stack, then build and test it), transition an existing repository to a stated standard, and check the user-level /.claude layer that loads in every session. English-first, with secret denials and human gates on anyt.

not rated 4 1mo ago A tokens not measured original MIT

minottobot

1126

EmanueleMinotto/minottobot

Plugin Claude Code

Bundles 8 skills · 1,258 tokens together

Use whenever the user asks about QA, testing strategy, CI/CD health, team processes, developer experience, code review practices, test coverage, flaky tests, monitoring, or any audit of an engineering team's quality practices.

not rated 4 changed 1mo ago A tokens not measured original MIT

stm

1127

mdsohaib/screenshot-time-machine

Skill Claude Code

Screenshot every page of the running localhost dev server and report which pages changed since the last snapshot. Use after editing anything users can see (pages, components, CSS/Tailwind, layouts, templates) to visually verify before saying you're done, and when the user says "check the UI", "does it look right"…

not rated 4 8d ago A 112 tokens original MIT

eval-coach

1128

BayramAnnakov/eval-coach

Plugin Claude Code

Bundles 1 skill · 20 tokens together

AI evaluation strategy design assistant using Evaluation-Driven Development (EDD).

not rated 4 10mo ago A tokens not measured original MIT

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: