Agent skill

Test Generator

by gustavscirulis in gustavscirulis/snapgrid

Generate test templates for unit tests, integration tests, and UI tests using Swift Testing and XCTest.

Custom licenceAuto-check: notesTesting & QA

Install Test Generator

skills CLI

$ npx skills add gustavscirulis/snapgrid --skill test-generator -a claude-code

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

GitHub CLI

$ gh skill install gustavscirulis/snapgrid test-generator --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/gustavscirulis/snapgrid.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/skills/generators/test-generator .claude/skills/test-generator && 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 "test-generator" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/generators/test-generator into .claude/skills/test-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-generator", 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/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/generators/test-generator

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 gustavscirulis/snapgrid --skill test-generator -a codex

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

GitHub CLI

$ gh skill install gustavscirulis/snapgrid test-generator --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/skills/generators/test-generator .agents/skills/test-generator && 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 "test-generator" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/generators/test-generator into .agents/skills/test-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-generator", 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 gustavscirulis/snapgrid --skill test-generator -a cursor

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

GitHub CLI

$ gh skill install gustavscirulis/snapgrid test-generator --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/skills/generators/test-generator .cursor/skills/test-generator && 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 "test-generator" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/generators/test-generator into .cursor/skills/test-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-generator", 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/gustavscirulis/snapgrid.git --path .claude/skills/skills/generators/test-generator

--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 gustavscirulis/snapgrid --skill test-generator -a gemini-cli

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

GitHub CLI

$ gh skill install gustavscirulis/snapgrid test-generator --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/gustavscirulis/snapgrid.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/skills/generators/test-generator .gemini/skills/test-generator && 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 "test-generator" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/generators/test-generator into .gemini/skills/test-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-generator", 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 gustavscirulis/snapgrid test-generator

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 gustavscirulis/snapgrid --skill test-generator -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/skills/generators/test-generator .github/skills/test-generator && 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 "test-generator" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/generators/test-generator into .github/skills/test-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-generator", 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 gustavscirulis/snapgrid --skill test-generator -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 gustavscirulis/snapgrid test-generator --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/skills/generators/test-generator .opencode/skills/test-generator && 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 "test-generator" agent skill from https://github.com/gustavscirulis/snapgrid/tree/main/.claude/skills/skills/generators/test-generator into .opencode/skills/test-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-generator", 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: test-generator
GitHub stars: 117
Used in: 1 other repo
Token cost: ~2.7k tokens
SKILL.md length: 682 words
Files: 3
Skills in repo: 118
Repo updated: Apr 30, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Generate test templates for unit tests, integration tests, and UI tests using Swift Testing and XCTest.

Works in 9 steps: Project Context Detection → Conflict Detection → Architecture Detection → …
Adding tests to iOS/macOS apps
SKILL.md covers When This Skill Activates, Decision Tree, Pre-Generation Checks and Configuration Questions, plus 7 more sections
Calls xcodebuild

What it does

Test Generator is an agent skill from gustavscirulis/snapgrid. Generate test templates for unit tests, integration tests, and UI tests using Swift Testing and XCTest. Use when adding tests to iOS/macOS apps.

Its SKILL.md is about 2.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `templates.md` and `testing-patterns.md`).

It sits in Testing & QA, covering iOS development, Unit testing and Test generation. It works with iOS and macOS. The repository describes itself as: SnapGrid is an open-source Mac app for collecting, organizing, and analyzing UI screenshots. It uses AI to automatically detect UI components and patterns, making it a powerful…

When your agent uses it

Adding tests to iOS/macOS apps
Tasks that involve iOS development
Tasks that involve Unit testing

Example prompts

“/test-generator”

Requirements

Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion

Workflow steps

9 steps, taken from the step headings in SKILL.md.

Project Context Detection
Conflict Detection
Architecture Detection
Testing Framework
Test Types to Generate
Architecture Pattern
Add Test Target
Configure Test Scheme
Run Tests

What it can do on your machine

Read from SKILL.md and the folder at commit eb7eaf4. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
- Read
- Write
- Edit
- Glob
- Grep
- Bash
- AskUserQuestion
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- xcodebuild
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- developer.apple.com
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

Test Generator loads about 2.7k tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 682 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~40
When it runs · the whole SKILL.md, loaded when a task matches: ~2.7k

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

allowed-tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 682 words (~2,699 tokens).

“Generate test templates for unit tests, integration tests, and UI tests in iOS/macOS apps.”

— opening of SKILL.md by gustavscirulis, Custom licence

name: test-generator
allowed-tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion

Outline of SKILL.md

Test Generator
When This Skill Activates
Decision Tree
Pre-Generation Checks
1. Project Context Detection
2. Conflict Detection
3. Architecture Detection
Configuration Questions
1. Testing Framework
2. Test Types to Generate
3. Architecture Pattern
Generated Files
Unit Tests
UI Tests
Swift Testing (Modern)
Basic Test Structure
Parameterized Tests
XCTest (Traditional)
Basic Test Structure
Test Patterns
Testing ViewModels
Testing Async Code
Mock Creation
Protocol-Based Mocks
UI Testing
Screen Object Pattern
Integration Steps
1. Add Test Target
2. Configure Test Scheme
3. Run Tests

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files in .claude/skills/skills/generators/test-generator of gustavscirulis/snapgrid.

SKILL.md
templates.md
testing-patterns.md

Open the folder on GitHubat commit eb7eaf4

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in gustavscirulis/snapgrid, which our catalogue first saw on October 7, 2026.

rshankras/claude-code-apple-skillsskills/generators/test-generator

Compare with similar skills

Test Generator 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.

Test Generator compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Test Generator this skillgustavscirulis/snapgrid	117	1 repos	~2.7k	Automated safety check: Notes	Custom licence	5 mo ago
Testing iOS Codebitwarden/ios	696	—	~1.8k	Automated safety check: Pass	GPL-3.0	today
OpenROAD Module Test AdderThe-OpenROAD-Project/OpenROAD	3.2k	—	~1.8k	Automated safety check: Pass	BSD-3-Clause	today
Kane CLI Browser TestingLambdaTest/kane-cli	248	—	~8.4k	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 Test389ds/389-ds-base	294	—	~1.8k	Automated safety check: Pass	Custom licence	today

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Questions about Test Generator

What does Test Generator do?

Generate test templates for unit tests, integration tests, and UI tests using Swift Testing and XCTest. Test Generator is an agent skill from gustavscirulis/snapgrid. Generate test templates for unit tests, integration tests, and UI tests using Swift Testing and XCTest.

When should I use Test Generator?

Test Generator fits situations like: adding tests to iOS/macOS apps; tasks that involve iOS development; tasks that involve Unit testing.

How do I install Test Generator in Claude Code?

Run `npx skills add gustavscirulis/snapgrid --skill test-generator -a claude-code`. Or copy the skill folder (.claude/skills/skills/generators/test-generator in gustavscirulis/snapgrid) into .claude/skills/test-generator in your project. Claude Code loads it when a task matches its description.

How do I install Test Generator in Codex?

Run `npx skills add gustavscirulis/snapgrid --skill test-generator -a codex`. Or copy the skill folder (.claude/skills/skills/generators/test-generator in gustavscirulis/snapgrid) into .agents/skills/test-generator in your project. Codex loads it when a task matches its description.

Can I use Test Generator 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 gustavscirulis/snapgrid --skill test-generator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-generator, .gemini/skills/test-generator, .github/skills/test-generator and .opencode/skills/test-generator in your project.

What does Test Generator need to run?

Going by SKILL.md and its folder, Test Generator needs the command-line tools its instructions call (xcodebuild). Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion.

Does Test Generator access the network?

SKILL.md names 1 domain. As links in the text: developer.apple.com. This is read from the text; nothing was executed.

Is Test Generator safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Test Generator use?

Test Generator has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Test Generator use?

About 2.7k tokens (SKILL.md is roughly 11k 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 Test Generator?

Skills that share tags, products or a category with Test Generator: Testing iOS Code (bitwarden/ios, 696 stars), OpenROAD Module Test Adder (The-OpenROAD-Project/OpenROAD, 3.2k stars), Kane CLI Browser Testing (LambdaTest/kane-cli, 248 stars) and Write Tests (grafana/synthetic-monitoring-app, 171 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Test Generator?

gustavscirulis (a GitHub user) maintains it in gustavscirulis/snapgrid, which has 117 GitHub stars. The repository holds 118 skills in this directory. The repository was last updated on April 30, 2026.

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

Test Generator

Install Test Generator

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Used in 1 other repository

Compare with similar skills

Similar skills

Testing iOS Code

OpenROAD Module Test Adder

Kane CLI Browser Testing

Write Tests

Write Test

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Questions about Test Generator

Install Test Generator

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Used in 1 other repository

Compare with similar skills

Similar skills

More from gustavscirulis/snapgrid

Related

Questions about Test Generator