Claude skills and agent skills

NangoHQReads credentialsSkill

running-and-testing-locally

NangoHQ/nango/.agents/skills/running-and-testing-locally/SKILL.md

Use when running the Nango application locally for development and browser testing - covers Docker services, dev commands, service URLs, and troubleshooting startup issues

No other project uses it yet

HKUDSReads credentialsSkill

harness-eval

HKUDS/OpenHarness/.claude/skills/harness-eval/SKILL.md

This skill should be used when the user asks to "test the harness", "run integration tests", "validate features with real API", "test with real model calls", "run agent loop tests", "verify end-to-end", or needs to verify OpenHarness features on a real codebase with actual LLM calls.

dataelementSkill

e2e-test

dataelement/bisheng/.claude/skills/e2e-test/SKILL.md

为 BiSheng 生成和运行 E2E 测试。两种模式： (1) SDD 模式 — 基于 feature spec.md 的 AC 生成覆盖； (2) 自由模式 — 对指定页面/功能写测试。 采用双层策略：API 端到端测试（pytest + httpx）+ 页面手动验证清单。 自动处理认证、多租户隔离、权限检查、Radix UI 交互等常见问题。 用法：/e2e-test [feature_dir] 或 /e2e-test <描述> 当用户说"写 E2E 测试"、"端到端测试"、"E2E coverage"， 或使用 /e2e-test 命令时触发。

remotion-devSkill

update-chrome-binaries-test-region

remotion-dev/remotion/.agents/skills/update-chrome-binaries-test-region/SKILL.md

Publish Remotion Lambda Chrome binaries to the eu-central-1 test region and update hosted layer and Chrome version references. Use when updating Chrome binaries before full regional rollout.

No other project uses it yet

NVIDIAPipes a download into a shellSkill

test-release-canary

NVIDIA/OpenShell/.agents/skills/test-release-canary/SKILL.md

Manually dispatch and iterate on the Release Canary workflow that smoke-tests published OpenShell artifacts (install.sh on macOS/Ubuntu/Fedora, Helm chart on kind) after each Release Dev publish. Use when changing `.github/workflows/release-canary.yml`, validating a release before tagging, debugging a canary failure, or reproducing a canary job locally. Trigger keywords - release canary, release-canary, canary failed, canary dispatch, test release canary, post-release smoke, install.sh canary, helm chart canary, kind canary, dispatch canary.

No other project uses it yet

mozilla-firefoxSkill

perf-regression-triage

mozilla-firefox/firefox/.agents/skills/perf-regression-triage/SKILL.md

Handle a Perfherder performance regression bug end to end: read the alert bug, confirm whether the regression is real, find the cause, and iterate to a fix. Use when the user has a Perfherder/browsertime regression bug (the "N% <test> ... regression on <date>" bugs filed in Testing::Performance), needs to establish whether an alert summary is a real regression, is interpreting a PerfCompare baseRev/newRev comparison, or asks what to do about a patch of theirs that regressed a benchmark. Not for simply running perf tests or pushing them to try — including running an alert summary's tests with `mach try perf --alert` (use perftest) — nor for choosing or writing perf tests (use perftest), analyzing a profile you already have in hand (use profiler-analysis), SpiderMonkey microbenchmarks (use js-perf-investigation), or non-performance regressions such as failing tests, crashes, or build bustage.

appsmithorgSkill

diagnose-pw-failure

appsmithorg/appsmith/.agents/skills/diagnose-pw-failure/SKILL.md

Diagnose a Playwright test failure as a product bug by analyzing error output, screenshots, traces, and server logs. Produces a structured bug report with expected vs actual behavior, reproduction steps, and likely root cause. Use when a Playwright test keeps failing after spec fixes, "is this a product bug", "diagnose this test failure", or "the test is correct but the app is broken".

No other project uses it yet

mattpocockSkill

tdd

mattpocock/skills/skills/engineering/tdd/SKILL.md

Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests.

Often used withcapture-learning-tools·ketchup-video·figure-it-out

mattpocockSkill

migrate-to-shoehorn

mattpocock/skills/skills/misc/migrate-to-shoehorn/SKILL.md

Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.

Often used withsetup-ts-deep-modules·writing-beats·loop-me

gitbutlerappSkill

but-performance-tests

gitbutlerapp/gitbutler/.agents/skills/but-performance-tests/SKILL.md

Use when creating, changing, running, or debugging shell-based `but` CLI performance scenarios under `crates/but/tests/performance`, including Hyperfine runs, fixture setup, setup-to-test state, and output inspection.

No other project uses it yet

pingdotggSkill

test-t3-mobile

pingdotgg/t3code/.agents/skills/test-t3-mobile/SKILL.md

Test T3 Code's native iOS and Android app through its Device panel and returned AgentDevice command. Use for mobile verification, native-client builds, Metro launch, and mobile pairing against isolated development state.

metabaseSkill

e2e-test-create

metabase/metabase/.claude/skills/e2e-test-create/SKILL.md

Analyze React component source code to understand UI structure, then generate idiomatic Cypress E2E tests following Metabase conventions. Falls back to Playwright MCP browser exploration only when code reading and screenshot debugging are insufficient.

No other project uses it yet

humanlayerReads credentialsSkill

test-it-locally

humanlayer/humanlayer/.claude/skills/test-it-locally/SKILL.md

Test Riptide changes against the local devstack through the UI, HumanLayer CLI, and database. Use for local verification, agent-browser checks, local task or session creation, and devstack setup.

No other project uses it yet

denolandSkill

node-compat

denoland/deno/.claude/skills/node-compat/SKILL.md

Run a Node.js compatibility test, diagnose failures, and either fix the implementation, skip, or ignore the test. Use when asked to work on node compat tests.

langfuseSkill

seed-test-data

langfuse/langfuse/.agents/skills/seed-test-data/SKILL.md

Seed reproducible local Langfuse data in ClickHouse and Postgres. Use for complex traces, long sessions, v3/v4 events, bulk list data, or frontend rendering and performance tests; never use ad hoc scripts or raw inserts.

dotnetSkill

ci-analysis

dotnet/roslyn/.github/skills/ci-analysis/SKILL.md

Analyze CI build and test status from Azure DevOps and Helix for dotnet repository PRs. Use when checking CI status, investigating failures, determining if a PR is ready to merge, or given URLs containing dev.azure.com or helix.dot.net. Also use when asked "why is CI red", "test failures", "retry CI", "rerun tests", "is CI green", "build failed", "checks failing", or "flaky tests".

MaterialDesignInXAMLSkill

xamltest-ui-tests

MaterialDesignInXAML/MaterialDesignInXamlToolkit/.github/skills/xamltest-ui-tests/SKILL.md

Write and update WPF UI tests in MaterialDesignThemes.UITests using XAMLTest. Use when template, layout, focus, interaction, or visual behavior needs coverage, or when a reviewer asks to move runtime UI checks out of MaterialDesignThemes.Wpf.Tests.

No other project uses it yet

AutomatticSkill

help-center-ui-test

Automattic/wp-calypso/.claude/skills/help-center-ui-test/SKILL.md

Run a browser-based UI review of the WordPress.com Help Center across multiple surfaces, looking for visual and behavioral issues. Use when asked to test the Help Center UI.

flet-devSkill

test-flet-apps-dev

flet-dev/flet/.agents/skills/test-flet-apps-dev/SKILL.md

Use when testing or debugging Flet apps in maintainer/contributor development mode with local Python package sources and the local Flutter client, including web, desktop, browser, and computer-use verification workflows.

mastra-aiSkill

e2e-tests-studio

mastra-ai/mastra/.claude/skills/e2e-tests-studio/SKILL.md

REQUIRED when modifying any file in packages/playground-ui or packages/playground. Triggers on: React component creation/modification/refactoring, UI changes, new playground features, bug fixes affecting studio UI. Generates Playwright E2E tests that validate PRODUCT BEHAVIOR, not just UI states.