Official agent skill

Write Tests

Write tests for datadog-ci commands and helpers using established repository patterns.

OfficialApache-2.0Auto-check passedTesting & QA

Install Write Tests

skills CLI

$ npx skills add DataDog/datadog-ci --skill write-tests -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install DataDog/datadog-ci write-tests --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/DataDog/datadog-ci.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/write-tests .claude/skills/write-tests && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "write-tests" agent skill from https://github.com/DataDog/datadog-ci/tree/master/.claude/skills/write-tests into .claude/skills/write-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "write-tests", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/DataDog/datadog-ci/tree/master/.claude/skills/write-tests

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add DataDog/datadog-ci --skill write-tests -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install DataDog/datadog-ci write-tests --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DataDog/datadog-ci.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/write-tests .agents/skills/write-tests && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "write-tests" agent skill from https://github.com/DataDog/datadog-ci/tree/master/.claude/skills/write-tests into .agents/skills/write-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "write-tests", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add DataDog/datadog-ci --skill write-tests -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install DataDog/datadog-ci write-tests --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DataDog/datadog-ci.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/write-tests .cursor/skills/write-tests && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "write-tests" agent skill from https://github.com/DataDog/datadog-ci/tree/master/.claude/skills/write-tests into .cursor/skills/write-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "write-tests", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/DataDog/datadog-ci.git --path .claude/skills/write-tests

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add DataDog/datadog-ci --skill write-tests -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install DataDog/datadog-ci write-tests --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DataDog/datadog-ci.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/write-tests .gemini/skills/write-tests && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "write-tests" agent skill from https://github.com/DataDog/datadog-ci/tree/master/.claude/skills/write-tests into .gemini/skills/write-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "write-tests", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install DataDog/datadog-ci write-tests

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add DataDog/datadog-ci --skill write-tests -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/DataDog/datadog-ci.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/write-tests .github/skills/write-tests && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "write-tests" agent skill from https://github.com/DataDog/datadog-ci/tree/master/.claude/skills/write-tests into .github/skills/write-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "write-tests", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add DataDog/datadog-ci --skill write-tests -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install DataDog/datadog-ci write-tests --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DataDog/datadog-ci.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/write-tests .opencode/skills/write-tests && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "write-tests" agent skill from https://github.com/DataDog/datadog-ci/tree/master/.claude/skills/write-tests into .opencode/skills/write-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "write-tests", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: write-tests
GitHub stars: 161
Token cost: ~435 tokens
SKILL.md length: 160 words
Files: 1
Skills in repo: 2
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Write tests for datadog-ci commands and helpers using established repository patterns.

Tasks that involve Test generation
SKILL.md covers Conventions, Key test utilities, Patterns and Running tests
Calls yarn; needs MOCK_DATADOG_API_KEY
Tasks that involve Design patterns

What it does

Write Tests is an agent skill from DataDog/datadog-ci, published by the product's own GitHub organization. Write tests for datadog-ci commands and helpers using established repository patterns.

Its SKILL.md is about 440 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Test generation and Design patterns. It works with Datadog and Jest. The repository describes itself as: Use Datadog from your CI. The licence is Apache-2.0.

When your agent uses it

Tasks that involve Test generation
Tasks that involve Design patterns

Example prompts

“/write-tests”

Requirements

A credential in MOCK_DATADOG_API_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit a17526b. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- yarn
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use yarn, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- MOCK_DATADOG_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Write Tests loads about 435 tokens when it runs. Until then it costs about 25 tokens; SKILL.md has 160 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~25
When it runs · the whole SKILL.md, loaded when a task matches: ~435

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from DataDog/datadog-ci at commit a17526b, republished under its Apache-2.0 licence (© DataDog). 160 words, ~435 tokens.

Download SKILL.mdSave it as .claude/skills/write-tests/SKILL.md (or your agent's skills folder).

name: write-tests
description: Write tests for datadog-ci commands and helpers using established repository patterns.

Write Tests

Write tests for datadog-ci commands and helpers following the repo's established patterns. Before writing tests, read existing tests in the same package to match local patterns.

Conventions

Place tests in __tests__/*.test.ts next to the source, fixtures in __tests__/fixtures/

Key test utilities

From packages/base/src/helpers/__tests__/testing-tools.ts:

createMockContext(opts?) -- creates a mock context with stdout and stderr writable streams. Use context.stdout.toString() / context.stderr.toString() to check output.
makeRunCLI(commandClass, baseArgs, opts?) -- returns an async function (extraArgs, extraEnv?) => {context, code} that registers and runs a command through the full CLI pipeline.
createCommand(commandClass, context?) -- instantiates a command with mock context and resolved option defaults. Good for unit-testing command methods directly.
MOCK_DATADOG_API_KEY, MOCK_BASE_URL -- standard mock values.
getRequestError(status, {errors?, message?}) -- creates a mock RequestError.

Patterns

Use jest.spyOn() for mocking, restore in afterEach or use jest.restoreAllMocks()
Use jest.mock() for module-level mocks when needed
Table-driven tests with describe.each / test.each where appropriate
Check both stdout output and exit code
For commands that make HTTP requests, mock the request layer (e.g., fetch)

Running tests

yarn test                    # all tests
yarn test <path>             # specific package or file
yarn test --testPathPattern  # regex match

Files

Just SKILL.md in .claude/skills/write-tests of DataDog/datadog-ci.

Open the folder on GitHubat commit a17526b

Compare with similar skills

Write Tests next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Write Tests compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Write Tests this skillDataDog/datadog-ci	161	—	~435	Automated safety check: Pass	Apache-2.0	today
Write Testsgrafana/synthetic-monitoring-app	171	—	~1.2k	Automated safety check: Pass	AGPL-3.0	today
Write Testsopenplayerjs/openplayerjs	649	—	~1.8k	Automated safety check: Pass	MIT	yesterday
MoAI TDD Workflowmodu-ai/moai-adk	1.2k	—	~3.1k	Automated safety check: Pass	Apache-2.0	today
Console Testingsynnaxlabs/synnax	128	—	~5.4k	Automated safety check: Pass	Custom licence	today
Test Patternsrohitg00/skillkit	1.5k	—	~1.8k	Automated safety check: Pass	Apache-2.0	4 mo ago

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Questions about Write Tests

What does Write Tests do?

Write tests for datadog-ci commands and helpers using established repository patterns. Write Tests is an agent skill from DataDog/datadog-ci, published by the product's own GitHub organization. Write tests for datadog-ci commands and helpers using established repository patterns.

When should I use Write Tests?

Write Tests fits situations like: tasks that involve Test generation; tasks that involve Design patterns.

How do I install Write Tests in Claude Code?

Run `npx skills add DataDog/datadog-ci --skill write-tests -a claude-code`. Or copy the skill folder (.claude/skills/write-tests in DataDog/datadog-ci) into .claude/skills/write-tests in your project. Claude Code loads it when a task matches its description.

How do I install Write Tests in Codex?

Run `npx skills add DataDog/datadog-ci --skill write-tests -a codex`. Or copy the skill folder (.claude/skills/write-tests in DataDog/datadog-ci) into .agents/skills/write-tests in your project. Codex loads it when a task matches its description.

Can I use Write Tests in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add DataDog/datadog-ci --skill write-tests -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/write-tests, .gemini/skills/write-tests, .github/skills/write-tests and .opencode/skills/write-tests in your project.

What does Write Tests need to run?

Going by SKILL.md and its folder, Write Tests needs the command-line tools its instructions call (yarn) and credentials named MOCK_DATADOG_API_KEY. Our summary lists: A credential in MOCK_DATADOG_API_KEY.

Does Write Tests access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Write Tests safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Write Tests use?

Write Tests is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Write Tests use?

About 435 tokens (SKILL.md is roughly 1.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Write Tests?

Skills that share tags, products or a category with Write Tests: Write Tests (grafana/synthetic-monitoring-app, 171 stars), Write Tests (openplayerjs/openplayerjs, 649 stars), MoAI TDD Workflow (modu-ai/moai-adk, 1.2k stars) and Console Testing (synnaxlabs/synnax, 128 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Write Tests?

DataDog (a GitHub organization, an official publisher) maintains it in DataDog/datadog-ci, which has 161 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on October 7, 2026.

Source: DataDog/datadog-ci on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Write Tests

Install Write Tests

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Write Tests

Conventions

Key test utilities

Patterns

Running tests

Files

Compare with similar skills

Similar skills

Write Tests

Write Tests

MoAI TDD Workflow

Console Testing

Test Patterns

Add Tests

More from DataDog/datadog-ci

Create Plugin

Questions about Write Tests

Install Write Tests

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Write Tests

Conventions

Key test utilities

Patterns

Running tests

Files

Compare with similar skills

Similar skills

Write Tests

Write Tests

MoAI TDD Workflow

Console Testing

Test Patterns

Add Tests

More from DataDog/datadog-ci

Create Plugin

Related

Questions about Write Tests