Is the Swift Testing skill free?

Yes. The skill itself is free from bocato/swift-testing-agent-skill. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Swift Testing SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install Swift Testing?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Swift Testing with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Swift Testing

Swift Testing patterns, test-double taxonomy, and migration guidance for @Test-based suites.

by bocato · bocato/swift-testing-agent-skill

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 13, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 18, 2026 · 5d36e69

Asked for a test suite for an email validator plus a repository mock: the skill version used @Suite/@Test parameterization across 3-4 inputs each, correctly renamed the naive 'MockUserRepository' to a 'SpyingStub' per Fowler's taxonomy, and placed it next to the protocol under #if DEBUG exactly as the skill mandates — the baseline used plain XCTest and mislabeled the stub as a mock.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What Swift Testing does

Encodes Swift Testing conventions (@Test/#expect/#require/@Suite), Martin Fowler's test-double taxonomy (correcting the community habit of calling every stub a 'Mock'), and fixture/mock placement rules, backed by nine reference files covering organization, async, migration, parameterized, and snapshot testing. Triggers on Swift Testing keywords, XCTest-migration requests, or test-double/fixture/TDD questions scoped to Swift.

How to install Swift Testing

git clone https://github.com/bocato/swift-testing-agent-skill
cd swift-testing-agent-skill
mkdir -p ~/.claude/skills
cp -r swift-testing ~/.claude/skills/swift-testing

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Swift Testing

/swift-testing Swift Testing patterns, test-double taxonomy, and migration guidance for @Test-based suites.

It also activates on plain-language prompts like these:

Migrate these XCTest cases to Swift Testing with @Test and #expect
Should this test double be a stub or a mock in my Swift Testing suite
Write parameterized Swift Testing cases for this async function

Frequently asked questions

Is the Swift Testing skill free?: Yes. The skill itself is free from bocato/swift-testing-agent-skill. SkillProof publishes the install command and an independent test verdict at no cost.
Does Swift Testing work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 13, 2026. Verdict: Tested · Works. Asked for a test suite for an email validator plus a repository mock: the skill version used @Suite/@Test parameterization across 3-4 inputs each, correctly renamed the naive 'MockUserRepository' to a 'SpyingStub' per Fowler's taxonomy, and placed it next to the protocol under #if DEBUG exactly as the skill mandates — the baseline used plain XCTest and mislabeled the stub as a mock.
What is the Swift Testing SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install Swift Testing?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Swift Testing with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.