write-swift SKILL.md skillA
write-swift from asymmetric-al/core is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add asymmetric-al/core/write-swift@git:20260930.a2d2b08Pins git:20260930.a2d2b08 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- asymmetric-al/core
- Path
.agents/skills/write-swift/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260930.a2d2b08, committed Sep 30, 2026
- First version recorded
- Sep 23, 2026
- Size
- 42,839 bytes
- Repository stars
- 379
- License
- AGPL-3.0
How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics (some vs any), API design, performance and ARC, Swift Testing, macros, and the modern language features agents don't know about yet. Use when writing, reviewing, or migrating Swift. Only runs when explicitly invoked; it does not trigger on its own.
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
# Write Swift <!-- CORE-OVERLAY-START --> ## This repository (Asymmetric-al/core) This skill is Swift craft guidance. Core's product apps are Next.js and do not use Swift. Reconcile this overlay after upstream refreshes before running `bun run skills:sync`. ### Triggers - Explicit Swift, SwiftUI, or Apple-platform language work. - Keep `disable-model-invocation: true`. Do not load it for Core web/TypeScript hangs, data races, or performance work. ### Workflow 1. Confirm the request is actually Swift before applying this file. 2. For Core Next.js apps, use `docs/ai/rules/frontend.md` and the matching TypeScript/React skills instead. ### Checklist - [ ] The target language is Swift, not Core's TypeScript apps. <!-- CORE-OVERLAY-END --> How to write Swift the way the language wants to be written, current through Swift 6.4. **Toolchain baseline: Swift 6.4** (current public release). Rows and notes marked ⚠ require Swift 6.4; keep the older form when the project toolchain is Swift 6.3 or earlier. Concurrency guidance assumes the Swift 6.2 model — if the project is on 6.1 or earlier, §3's rules about `async` and `@concurrent` do not apply. …
Read the whole file at its exact version.
How to install
mdr add asymmetric-al/core/write-swift@sha256:ecc963b6cefe8bf6The line at the top of this page pins the label git:20260930.a2d2b08, 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_jpxxp3weybuyaixs)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 23, 2026 and Sep 30, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260930.a2d2b08 latest | 2026-09-30 | a2d2b08 | 42,839 B | A | view · diff |
| git:20260923.df971df | 2026-09-23 | df971df | 42,922 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 (42839 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
asymmetric-al/core · 379 stars · license AGPL-3.0 · pushed 2026-10-22 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_jpxxp3weybuyaixs GET https://markdownregistry.com/api/v1/resolve?ref=asymmetric-al/core/write-swift GET https://markdownregistry.com/api/v1/blob/ecc963b6cefe8bf6288fece34a6a6d718614037302eb02740c7bf4b6073b3ca6
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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