Agent skill

Run Tests

A skill your agent uses when the user asks to run tests, ejecutar tests, lanzar tests, pytest, vitest, check types, typecheck, lint, or verify the codebase.

AGPL-3.0Auto-check passedTesting & QA

Install Run Tests

skills CLI

$ npx skills add artcc/freelingo --skill run-tests -a claude-code

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

GitHub CLI

$ gh skill install artcc/freelingo run-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/artcc/freelingo.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.opencode/skills/run-tests .claude/skills/run-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 "run-tests" agent skill from https://github.com/artcc/freelingo/tree/main/.opencode/skills/run-tests into .claude/skills/run-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-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/artcc/freelingo/tree/main/.opencode/skills/run-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 artcc/freelingo --skill run-tests -a codex

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

GitHub CLI

$ gh skill install artcc/freelingo run-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/artcc/freelingo.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.opencode/skills/run-tests .agents/skills/run-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 "run-tests" agent skill from https://github.com/artcc/freelingo/tree/main/.opencode/skills/run-tests into .agents/skills/run-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-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 artcc/freelingo --skill run-tests -a cursor

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

GitHub CLI

$ gh skill install artcc/freelingo run-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/artcc/freelingo.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.opencode/skills/run-tests .cursor/skills/run-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 "run-tests" agent skill from https://github.com/artcc/freelingo/tree/main/.opencode/skills/run-tests into .cursor/skills/run-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-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/artcc/freelingo.git --path .opencode/skills/run-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 artcc/freelingo --skill run-tests -a gemini-cli

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

GitHub CLI

$ gh skill install artcc/freelingo run-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/artcc/freelingo.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.opencode/skills/run-tests .gemini/skills/run-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 "run-tests" agent skill from https://github.com/artcc/freelingo/tree/main/.opencode/skills/run-tests into .gemini/skills/run-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-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 artcc/freelingo run-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 artcc/freelingo --skill run-tests -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/artcc/freelingo.git skills-src && mkdir -p .github/skills && cp -r skills-src/.opencode/skills/run-tests .github/skills/run-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 "run-tests" agent skill from https://github.com/artcc/freelingo/tree/main/.opencode/skills/run-tests into .github/skills/run-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-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 artcc/freelingo --skill run-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 artcc/freelingo run-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/artcc/freelingo.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.opencode/skills/run-tests .opencode/skills/run-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 "run-tests" agent skill from https://github.com/artcc/freelingo/tree/main/.opencode/skills/run-tests into .opencode/skills/run-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-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: run-tests
GitHub stars: 158
Token cost: ~976 tokens
SKILL.md length: 357 words
Files: 1
Skills in repo: 2
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: AGPL-3.0

At a glance

A skill your agent uses when the user asks to run tests, ejecutar tests, lanzar tests, pytest, vitest, check types, typecheck, lint, or verify the codebase.

The user asks to run tests
SKILL.md covers Backend tests (pytest), Frontend tests (vitest), Frontend checks and Backend lint, plus 2 more sections
Calls pytest, npm and npx
Verify the codebase

What it does

Run Tests is an agent skill from artcc/freelingo. Use when the user asks to run tests, ejecutar tests, lanzar tests, pytest, vitest, check types, typecheck, lint, or verify the codebase. Runs backend pytest, frontend vitest, frontend tsc/eslint/prettier, and backend ruff/black.

Its SKILL.md is about 980 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 Linting and formatting, Unit testing and Study guides and flashcards. It works with pytest, Vitest, ESLint and Prettier. The repository describes itself as: Open-source, self-hosted AI language learning platform with local or cloud LLMs, CEFR study plans, an AI tutor, voice conversations, flashcards, and spaced repetition. The licence is AGPL-3.0.

When your agent uses it

The user asks to run tests
Verify the codebase

Example prompts

“/run-tests”

Requirements

Python 3
Node.js
Docker

What it can do on your machine

Read from SKILL.md and the folder at commit c2f6d2a. 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:
- pytest
- npm
- npx
- python3
- pip
- ruff
- black
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npm, npx and pip, 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 no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Run Tests loads about 976 tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 357 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~60
When it runs · the whole SKILL.md, loaded when a task matches: ~976

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 artcc/freelingo at commit c2f6d2a, republished under its AGPL-3.0 licence (© artcc). 357 words, ~976 tokens.

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

name: run-tests
description: Use when the user asks to run tests, ejecutar tests, lanzar tests, pytest, vitest, check types, typecheck, lint, or verify the codebase. Runs backend pytest, frontend vitest, frontend tsc/eslint/prettier, and backend ruff/black.

Run Tests — FreeLingo

Backend tests (pytest)

The project does NOT use Docker for local tests. Tests are fully isolated:

SQLite in-memory (no PostgreSQL needed)
Redis mocked in-memory (no Redis server needed)
LLM always mocked (no external API calls)

Prerequisites

bash

python3 -m venv .venv && source .venv/bin/activate && pip install -r backend/requirements.txt

.venv/ is already in .gitignore. Create it once, activate before each session.

Run

bash

source .venv/bin/activate && cd backend && pytest -v

Use a command timeout of at least 600 seconds for the full backend suite; the current run takes about 4 minutes and can exceed shorter 120-second tool defaults.

Options:

Single file: source .venv/bin/activate && cd backend && pytest tests/test_auth.py -v
Single test: source .venv/bin/activate && cd backend && pytest tests/test_flashcards.py::test_quality_3_basic_progression -v
Coverage HTML: source .venv/bin/activate && cd backend && pytest --cov-report=html

Frontend tests (vitest)

bash

cd frontend && npm run test:run

474 tests covering stores, components, hooks, app pages, lib, i18n, middleware, review UI, review prompt triggers, billing UI, freemium state, memory management, SSE parsing, chat stream resets, toasts, and API interceptor. Frontend coverage is not configured/reported:

lib/api.ts — auth interceptor, 401 refresh, retry
store/auth.ts — isSubscribed(), logout
lib/audio.ts — float32ToWav WAV encoding
lib/conversation-ws.ts — WebSocket URL builder
middleware.ts — route protection, locale detection
store/config.ts — config loading, idempotency
store/language.ts — language CRUD, switching
store/progress.ts — XP, streak, unit progress, level test
lib/mappers.ts — mapUser transformation
lib/target-languages.ts — language code resolution
data/curriculum.ts — curriculum data integrity
components/LanguageSwitcher.tsx — sidebar dropdown
components/TargetLanguageSelector.tsx — language grid
components/VoiceRecorder.tsx — STT recorder states
components/AudioPlayer.tsx — TTS player states
components/ProfileSection.tsx — profile CRUD, avatar
components/UnitCard.tsx + UnitDrawer.tsx — plan units
components/reviews/* — review prompt and landing carousel
app/(app)/admin/reviews/page.tsx — review moderation UI
lib/reviews.ts — review API client
lib/review-prompt-triggers.ts — voice-session and unit-completion review prompt triggers

Options:

Watch mode: npm run test
Single file: npx vitest run tests/lib/api.test.ts

Show full SKILL.md (108 more words)Show less

Frontend checks

bash

cd frontend && npx tsc --noEmit                 # TypeScript type checking
cd frontend && npm run lint                     # Lint
cd frontend && npx prettier --check src/        # Format check

Backend lint

bash

source .venv/bin/activate && cd backend && ruff check . && black --check .

If a suite fails

If any backend or frontend test fails after launching a suite, STOP immediately, report the failing test(s), and ask the user how to proceed.
Do not modify production code or tests to make the suite pass without explicit user approval.
If lint, typecheck, or format checks fail without test failures, report the error and ask before making non-formatting code changes.
After the user approves a fix, re-run only the failing command unless they request the full suite.

Canonical format script

bash

./scripts/format.sh

Runs the same backend/frontend style tools from fixed project paths, so results do not depend on the current working directory.

Files

Just SKILL.md in .opencode/skills/run-tests of artcc/freelingo.

Open the folder on GitHubat commit c2f6d2a

Compare with similar skills

Run 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.

Run Tests compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Run Tests this skillartcc/freelingo	158	—	~976	Automated safety check: Pass	AGPL-3.0	today
Validatejuliepy/AI-Engineer-from-scrach	430	—	~500	Automated safety check: Pass	None	1 mo ago
Typescript ToolingHoangNguyen0403/agent-skills-standard	570	—	~688	Automated safety check: Pass	MIT	yesterday
Simple Modern Uvjlevy/simple-modern-uv	301	—	~1.9k	Automated safety check: Pass	MIT	1 mo ago
Eslint Vitest Rule Testerantfu-collective/eslint-vitest-rule-tester	142	—	~1.3k	Automated safety check: Pass	MIT	27 days ago
MoAI TDD Workflowmodu-ai/moai-adk	1.2k	—	~3.1k	Automated safety check: Pass	Apache-2.0	today

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Questions about Run Tests

What does Run Tests do?

A skill your agent uses when the user asks to run tests, ejecutar tests, lanzar tests, pytest, vitest, check types, typecheck, lint, or verify the codebase. Run Tests is an agent skill from artcc/freelingo. Use when the user asks to run tests, ejecutar tests, lanzar tests, pytest, vitest, check types, typecheck, lint, or verify the codebase.

When should I use Run Tests?

Run Tests fits situations like: the user asks to run tests; verify the codebase.

How do I install Run Tests in Claude Code?

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

How do I install Run Tests in Codex?

Run `npx skills add artcc/freelingo --skill run-tests -a codex`. Or copy the skill folder (.opencode/skills/run-tests in artcc/freelingo) into .agents/skills/run-tests in your project. Codex loads it when a task matches its description.

Can I use Run 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 artcc/freelingo --skill run-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/run-tests, .gemini/skills/run-tests, .github/skills/run-tests and .opencode/skills/run-tests in your project.

What does Run Tests need to run?

Going by SKILL.md and its folder, Run Tests needs the command-line tools its instructions call (pytest, npm, npx, python3, pip and ruff). Our summary lists: Python 3; Node.js; Docker.

Does Run Tests access the network?

SKILL.md contains no URLs. Its commands use npm, npx and pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Run 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 Run Tests use?

Run Tests is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Run Tests use?

About 976 tokens (SKILL.md is roughly 3.9k 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 Run Tests?

Skills that share tags, products or a category with Run Tests: Validate (juliepy/AI-Engineer-from-scrach, 430 stars), Typescript Tooling (HoangNguyen0403/agent-skills-standard, 570 stars), Simple Modern Uv (jlevy/simple-modern-uv, 301 stars) and Eslint Vitest Rule Tester (antfu-collective/eslint-vitest-rule-tester, 142 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Run Tests?

artcc (a GitHub user) maintains it in artcc/freelingo, which has 158 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on October 7, 2026.

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

Run Tests

Install Run 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

Run Tests — FreeLingo

Backend tests (pytest)

Prerequisites

Run

Frontend tests (vitest)

Frontend checks

Backend lint

If a suite fails

Canonical format script

Files

Compare with similar skills

Similar skills

Validate

Typescript Tooling

Simple Modern Uv

Eslint Vitest Rule Tester

MoAI TDD Workflow

Check

More from artcc/freelingo

Pre Push

Questions about Run Tests

Install Run 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

Run Tests — FreeLingo

Backend tests (pytest)

Prerequisites

Run

Frontend tests (vitest)

Frontend checks

Backend lint

If a suite fails

Canonical format script

Files

Compare with similar skills

Similar skills

Validate

Typescript Tooling

Simple Modern Uv

Eslint Vitest Rule Tester

MoAI TDD Workflow

Check

More from artcc/freelingo

Pre Push

Related

Questions about Run Tests