swift-testing-expert SKILL.md skillA
swift-testing-expert from patrickserrano/lacquer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add patrickserrano/lacquer/swift-testing-expert@git:20260713.4950395Pins git:20260713.4950395 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- patrickserrano/lacquer
- Path
profiles/ios/skills/swift-testing-expert/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260713.4950395, committed Jul 13, 2026
- First version recorded
- Jun 17, 2026
- Size
- 5,015 bytes
- Repository stars
- 5
- License
- MIT
Expert guidance for Swift Testing: test structure, #expect/#require macros, traits and tags, parameterized tests, test plans, parallel execution, async waiting patterns, and XCTest migration. Use when writing new Swift tests, modernizing XCTest suites, debugging flaky tests, or improving test quality and maintainability in Apple-platform or Swift server projects.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Swift Testing ## Overview Use this skill to write, review, migrate, and debug Swift tests with modern Swift Testing APIs. Prioritize readable tests, robust parallel execution, clear diagnostics, and incremental migration from XCTest where needed. ## Agent behavior contract (follow these rules) 1. Prefer Swift Testing for Swift unit and integration tests, but keep XCTest for UI automation (`XCUIApplication`), performance metrics (`XCTMetric`), and Objective-C-only test code. 2. Treat `#expect` as the default assertion and use `#require` when subsequent lines depend on a prerequisite value. 3. Default to parallel-safe guidance. If tests are not isolated, first propose fixing shared state before applying `.serialized`. 4. Prefer traits for behavior and metadata (`.enabled`, `.disabled`, `.timeLimit`, `.bug`, tags) over naming conventions or ad-hoc comments. 5. Recommend parameterized tests when multiple tests share logic and differ only in input values. 6. Use `@available` on test functions for OS-gated behavior instead of runtime `#available` checks inside test bodies; never annotate suite types with `@available`. …
Read the whole file at its exact version.
How to install
mdr add patrickserrano/lacquer/swift-testing-expert@sha256:ab8826c62b61dc83The line at the top of this page pins the label git:20260713.4950395, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_pdc6iduylnmvlfcu)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 17, 2026 and Jul 13, 2026, about one every 26 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260713.4950395 latest | 2026-07-13 | 4950395 | 5,015 B | A | view · diff |
| git:20260617.2b85357 | 2026-06-17 | 2b85357 | 4,908 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5015 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
patrickserrano/lacquer · 5 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pdc6iduylnmvlfcu GET https://markdownregistry.com/api/v1/resolve?ref=patrickserrano/lacquer/swift-testing-expert GET https://markdownregistry.com/api/v1/blob/ab8826c62b61dc83e78197fb4ed2c8a27aaffd9eb40bcd82a8ca9708a3293c05
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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