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Find the best CLAUDE.md, AGENTS.md and Claude skills

One search for your own team's files and the public ecosystem. See how real projects write their agent instructions, and bring the good ideas home.

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Model Context ProtocolSkill

testing

modelcontextprotocol/servers/.claude/skills/testing/SKILL.md

Write, place and run tests for a server in this repo. Use when choosing between driving the server through an MCP client and calling its functions directly; when writing a protocol-level test for a TypeScript or Python server; when choosing the command that runs one suite or a coverage report; or when a test is skipped or passes against a stale build.

Often used withbundle-dependency-prsupdate-library-template

92k8d agoReviewMountCreate a free account to mount
penpotSkill

testing

penpot/penpot/.agents/skills/testing/SKILL.md

Enforce TDD workflow and testing best practices for Penpot. Use when implementing features, fixing bugs, or modifying behavior. Reads testing memory for full guidance.

Steady4 mentions in 2 weeks

191 projects use a version of this

Often used withbundle-dependency-prsupdate-library-template

62k51d agoReviewMountCreate a free account to mount
meteorPipes a download into a shellSkill

testing

meteor/meteor/.github/skills/testing/SKILL.md

Use when writing tests, debugging test failures, running the test suite, or setting up test infrastructure. Covers self-test, package tests, and modern E2E tests.

Often used withbundle-dependency-prsupdate-library-template

45k5y agoReviewMountCreate a free account to mount
iOfficeAISkill

testing

iOfficeAI/AionUi/.claude/skills/testing/SKILL.md

Testing workflow and quality standards for writing and running tests. Use when: (1) Writing new tests, (2) Adding a new feature that needs tests, (3) Modifying logic that has existing tests, (4) Before claiming a task is complete.

191 projects use a version of this

Often used withbundle-dependency-prsupdate-library-template

34k7mo agoReviewMountCreate a free account to mount
garrytanSkill

testing

garrytan/gbrain/skills/testing/SKILL.md

Skill validation framework PLUS daily test-suite health and regression intelligence. Validates skill conformance (frontmatter, manifest coverage, resolver coverage). Runs the project test suite in tiered phases (unit / evals / integration / system health), classifies failures, and produces a regression-aware report.

Steady44 mentions in 2 weeks

191 projects use a version of this

Often used withbundle-dependency-prsupdate-library-template

31k3mo agoReviewMountCreate a free account to mount
OpenZeppelinSkill

testing

OpenZeppelin/openzeppelin-contracts/.claude/skills/testing/SKILL.md

Testing conventions for openzeppelin-contracts. Use when writing or modifying tests, mocks, or formal verification specs. Covers hardhat-exposed $-wrappers, when manual mocks are warranted, Hardhat+Chai patterns (loadFixture, shouldBehaveLike, multi-target loops), Foundry fuzz, Halmos symbolic execution, Certora rule-based verification, and the changeset rule.

Often used withbundle-dependency-prsupdate-library-template

27k11d agoReviewMountCreate a free account to mount
tursodatabaseSkill

testing

tursodatabase/turso/.claude/skills/testing/SKILL.md

How to write tests, when to use each type of test, and how to run them. Contains information about conversion of `.test` to `.sqltest`, and how to write `.sqltest` and rust tests

Steady15 mentions in 2 weeks

191 projects use a version of this

Often used withbundle-dependency-prsupdate-library-template

25k5d agoReviewMountCreate a free account to mount
redisSkill

testing

redis/go-redis/.claude/skills/testing/SKILL.md

Use when running go-redis tests of any kind — the full suite, a single test, or a filtered/focused subset (e.g. only cluster, sentinel, or pool specs); bringing up or tearing down the Docker test stack; the e2e maintenance-notifications suite (including the proxy-free logic tests); building or formatting; or setting the REDIS_VERSION / RE_CLUSTER / REDIS_PORT knobs that drive the test image and version gating. Covers how to focus a Ginkgo spec and how to run plain go tests.

Often used withbundle-dependency-prsupdate-library-template

22k3mo agoReviewMountCreate a free account to mount
desktopReads credentialsSkill

testing

desktop/desktop/.github/skills/testing/SKILL.md

Instructions for writing and maintaining tests in GitHub Desktop. Covers unit tests, UI component tests, and ad-hoc E2E tests. Use this skill when implementing features or bugfixes to write relevant tests, update existing tests, run the full suite to check for regressions, and produce screenshots and videos for Pull Request documentation.

Often used withbundle-dependency-prsupdate-library-template

22k5d agoReviewMountCreate a free account to mount
kortix-aiReads credentialsSkill

testing

kortix-ai/suna/.agents/skills/testing/SKILL.md

Use for every Kortix test task, behavior change, bug fix, refactor, API route change, CLI change, SDK change, browser journey, test failure, coverage question, local benchmark, or testing infrastructure change. Enforce the single local-first runner, black-box flow contracts, package-local SDK tests, browser-only Playwright tests, and real input/output verification.

Often used withbundle-dependency-prsupdate-library-template

20k1d agoReviewMountCreate a free account to mount
ryoppippiSkill

testing

ryoppippi/ccusage/.agents/skills/testing/SKILL.md

Guides ccusage Rust and Node tests. Use when adding or fixing cargo tests, Node test files, CLI snapshots, Claude model pricing, LiteLLM compatibility, or fixture-backed tests.

Steady3 mentions in 2 weeks

191 projects use a version of this

Often used withbundle-dependency-prsupdate-library-template

19k14d agoReviewMountCreate a free account to mount
elie222Skill

testing

elie222/inbox-zero/.claude/skills/testing/SKILL.md

Guidelines for testing the application with Vitest, including unit tests, integration tests (emulator), AI tests, and eval suites for LLM features

Steady10 mentions in 2 weeks

191 projects use a version of this

Often used withbundle-dependency-prsupdate-library-template

13k8mo agoReviewMountCreate a free account to mount
WordPressSkill

testing

WordPress/gutenberg/.agents/skills/testing/SKILL.md

Use when writing, running, or debugging tests in the Gutenberg repository — JavaScript unit tests (Jest), PHP tests (PHPUnit), or end-to-end tests (Playwright).

Often used withbundle-dependency-prsupdate-library-template

12k3d agoReviewMountCreate a free account to mount
Model Context ProtocolSkill

testing

modelcontextprotocol/inspector/.claude/skills/testing/SKILL.md

Write, run, place and fix tests in this repo. Use when adding a test, or end-to-end or integration coverage of an MCP operation (listing, paginating or calling tools); when choosing which npm command runs a given suite (web unit, web integration, Storybook, cli, mcpdo, tui, launcher, scripts); when deciding where a new test file belongs — beside its source, under src/test/, or in a client's __tests__/; when a per-file coverage check fails or a v8 ignore is in question; when asking which test tier spawns the built binary rather than importing it; or when rendering, mounting or asserting on Mantine components and their transitions in a test.

Steady2 mentions in 2 weeks

191 projects use a version of this

Often used withbundle-dependency-prsupdate-library-template

11k31d agoReviewMountCreate a free account to mount
warpdotdevSkill

tui-testing

warpdotdev/Warp/.agents/skills/tui-testing/SKILL.md

Write and run unit tests for Warp TUI (crates/warp_tui) elements/screens by rendering to text lines. Use for TUI test work.

Steady4 mentions in 2 weeks

6 projects use a version of this

66k47d agoReviewMountCreate a free account to mount
coreyhaines31Skill

ab-testing

coreyhaines31/marketingskills/skills/ab-testing/SKILL.md

When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program. Also use when the user mentions "A/B test," "split test," "experiment," "test this change," "variant copy," "multivariate test," "hypothesis," "should I test this," "which version is better," "test two versions," "statistical significance," "how long should I run this test," "growth experiments," "experiment velocity," "experiment backlog," "ICE score," "experimentation program," or "experiment playbook." Use this whenever someone is comparing two approaches and wants to measure which performs better, or when they want to build a systematic experimentation practice. For tracking implementation, see analytics. For page-level conversion optimization, see cro.

Often used withfree-toolsco-marketingemails

58k4mo agoReviewMountCreate a free account to mount
affaan-mReads credentialsSkill

e2e-testing

affaan-m/ECC/.agents/skills/e2e-testing/SKILL.md

Playwright E2E testing patterns, Page Object Model, configuration, CI/CD integration, artifact management, and flaky test strategies. Use when writing Playwright tests, structuring page objects, or fixing flaky E2E runs in CI.

Steady32 mentions in 2 weeks

89 projects use a version of this

Often used witheverything-claude-codeeverything-claude-code-conventionsbun-runtime

246k2mo agoReviewMountCreate a free account to mount
CLAUDE.md vs AGENTS.md

Agent instruction files

What are agent instruction files?

Plain text files in a repository that tell a coding agent how the project works: commands to run, conventions to follow and things to avoid. CLAUDE.md, AGENTS.md, cursor rules and skills are the common kinds.

CLAUDE.md or AGENTS.md?

CLAUDE.md is read by Claude Code. AGENTS.md is an open format that Codex, Cursor and other agents read. Many projects keep one and point the other at it.

What is a skill?

A folder with a SKILL.md that describes one capability, such as filling PDFs or reviewing code. The agent loads it only when the task calls for it.

Can I search my own team's files too?

Your agents already can, over MCP, limited to the files you're allowed to read. Searching them from this page is coming.