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Agent skill

Snapshot Test Setup

by gustavscirulis in gustavscirulis/snapgrid

Set up SwiftUI visual regression testing with swift-snapshot-testing.

Custom licenceAuto-check: notesMobile

Install Snapshot Test Setup

skills CLI
$ npx skills add gustavscirulis/snapgrid --skill snapshot-test-setup -a claude-code

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

GitHub CLI
$ gh skill install gustavscirulis/snapgrid snapshot-test-setup --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/testing/snapshot-test-setup .claude/skills/snapshot-test-setup && 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/

Facts

Skill name
snapshot-test-setup
GitHub stars
117
Used in
1 other repo
Token cost
~2.3k tokens
SKILL.md length
287 words
Files
1
Skills in repo
118
Repo updated
First seen
Licence
Custom licence

At a glance

Set up SwiftUI visual regression testing with swift-snapshot-testing.

  • Works in 7 steps: Project Context → Configuration Questions → Add Dependency → …
  • UI regression prevention
  • SKILL.md covers When This Skill Activates, Why Snapshot Tests, Pre-Setup Checks and Setup Process, plus 4 more sections
  • Calls xcodebuild; reaches github.com

What it does

Snapshot Test Setup is an agent skill from gustavscirulis/snapgrid. Set up SwiftUI visual regression testing with swift-snapshot-testing. Generates snapshot test boilerplate and CI configuration. Use for UI regression prevention.

Its SKILL.md is about 2.3k 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 Mobile, covering iOS development, Visual regression testing and Project scaffolding. It works with SwiftUI. 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

  • UI regression prevention
  • Tasks that involve iOS development
  • Tasks that involve Visual regression testing

Example prompts

  • “/snapshot-test-setup”

Requirements

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

Workflow steps

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

  1. Project Context
  2. Configuration Questions
  3. Add Dependency
  4. Create Snapshot Test Base
  5. Generate Snapshot Tests
  6. Recording Reference Images
  7. Re-record When Intentional Changes

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

    Hosts in commands or code, which the agent is likely to contact:

    • github.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

Snapshot Test Setup loads about 2.3k tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 287 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~2.3k

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 287 words (~2,275 tokens).

“Generate SwiftUI snapshot/visual regression tests using Point-Free's swift-snapshot-testing library. Catches unintended UI changes by comparing rendered views against reference images.”

— opening of SKILL.md by gustavscirulis, Custom licence
name
snapshot-test-setup
allowed-tools
Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/skills/testing/snapshot-test-setup of gustavscirulis/snapgrid.

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.

Compare with similar skills

Snapshot Test Setup 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.

Snapshot Test Setup compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Snapshot Test Setup this skillgustavscirulis/snapgrid1171 repos~2.3kAutomated safety check: NotesCustom licence
Swiftui Protwostraws/SwiftUI-Agent-Skill5.2k2 repos~1.5kAutomated safety check: PassMIT
Swiftui UI PatternsAFK-surf/OpenBridge4304 repos~887Automated safety check: PassMIT
Swiftui Performance Auditharperreed/dotfiles3348 repos~1.4kAutomated safety check: PassNone
Hig Project Contextraintree-technology/hig-doctor1435 repos~1.2kAutomated safety check: PassMIT
Hig Components Contentraintree-technology/hig-doctor1435 repos~1.3kAutomated safety check: PassMIT

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Works with

Categories

Questions about Snapshot Test Setup

What does Snapshot Test Setup do?

Set up SwiftUI visual regression testing with swift-snapshot-testing. Snapshot Test Setup is an agent skill from gustavscirulis/snapgrid. Set up SwiftUI visual regression testing with swift-snapshot-testing.

When should I use Snapshot Test Setup?

Snapshot Test Setup fits situations like: UI regression prevention; tasks that involve iOS development; tasks that involve Visual regression testing.

How do I install Snapshot Test Setup in Claude Code?

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

How do I install Snapshot Test Setup in Codex?

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

Can I use Snapshot Test Setup 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 snapshot-test-setup -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/snapshot-test-setup, .gemini/skills/snapshot-test-setup, .github/skills/snapshot-test-setup and .opencode/skills/snapshot-test-setup in your project.

What does Snapshot Test Setup need to run?

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

Does Snapshot Test Setup access the network?

SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Snapshot Test Setup 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 Snapshot Test Setup use?

Snapshot Test Setup 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 Snapshot Test Setup use?

About 2.3k tokens (SKILL.md is roughly 9.1k 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 Snapshot Test Setup?

Skills that share tags, products or a category with Snapshot Test Setup: Swiftui Pro (twostraws/SwiftUI-Agent-Skill, 5.2k stars), Swiftui UI Patterns (AFK-surf/OpenBridge, 430 stars), Swiftui Performance Audit (harperreed/dotfiles, 334 stars) and Hig Project Context (raintree-technology/hig-doctor, 143 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Snapshot Test Setup?

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.