swift-core SKILL.md skillA
swift-core from fusengine/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add fusengine/agents/swift-core@git:20260927.027656fPins git:20260927.027656f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- fusengine/agents
- Path
plugins/swift-apple-expert/skills/swift-core/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260927.027656f, committed Sep 27, 2026
- First version recorded
- Feb 1, 2026
- Size
- 3,708 bytes
- Repository stars
- 36
- License
- MIT
Use when implementing Swift 6 fundamentals — concurrency, architecture, testing, i18n, or performance — across any Apple platform.
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
<objective> Covers Swift 6 language and platform fundamentals shared across iOS, macOS, iPadOS, watchOS, and visionOS: async/await and actors with strict concurrency checking, Sendable typing, app architecture (MVVM with @Observable as the recommended default, Clean Architecture for complex apps), async testing with XCTest, String Catalog-based localization, and performance profiling with Instruments. References cover each area in depth: concurrency, architecture/DI, testing, i18n, and performance. Best practices: prefer actors over classes with locks for shared state, @Observable over ObservableObject, structured concurrency over completion handlers, String Catalogs for all user-facing text, profiling in Release (-O) builds, and value types (structs) over classes where possible. </objective> # Swift Core Swift 6 fundamentals shared across all Apple platforms. ## Agent Workflow (MANDATORY) Before ANY implementation, spawn 3 agents in parallel, one `Agent` call each with a `name`: 1. **fuse-ai-pilot:explore-codebase** - Analyze existing Swift patterns 2. **fuse-ai-pilot:research-expert** - Verify latest Swift 6 docs via Context7/Exa …
Read the whole file at its exact version.
How to install
mdr add fusengine/agents/swift-core@sha256:4ed13a67f34bfb42The line at the top of this page pins the label git:20260927.027656f, 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_6jizt6e6ya3ssaqn)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Feb 1, 2026 and Sep 27, 2026, about one every 59 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260927.027656f latest | 2026-09-27 | 027656f | 3,708 B | A | view · diff |
| git:20260904.5f1d30f | 2026-09-04 | 5f1d30f | 3,708 B | A | view · diff |
| git:20260729.3b91eed | 2026-07-29 | 3b91eed | 3,679 B | A | view · diff |
| git:20260207.0a3cd21 | 2026-02-07 | 0a3cd21 | 2,921 B | A | view · diff |
| git:20260201.9412fa7 | 2026-02-01 | 9412fa7 | 2,905 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 (3708 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
fusengine/agents · 36 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6jizt6e6ya3ssaqn GET https://markdownregistry.com/api/v1/resolve?ref=fusengine/agents/swift-core GET https://markdownregistry.com/api/v1/blob/4ed13a67f34bfb4255b7ada3576e857ae657509014badfee6cb319a08282a175
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.