Cross-Platform App Development Skill SKILL.md skillA
Cross-Platform App Development Skill from fal3/claude-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add fal3/claude-skills-collection/Cross-Platform App Development Skill@git:20260814.a9c26d7Pins git:20260814.a9c26d7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- fal3/claude-skills-collection
- Path
skills/cross-platform-app-development-skill/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260814.a9c26d7, committed Aug 14, 2026
- First version recorded
- Oct 22, 2025
- Size
- 7,877 bytes
- Repository stars
- 20
- License
- MIT
Use when one Swift/SwiftUI product intentionally targets two or more of iOS, iPadOS, Mac Catalyst, macOS, watchOS, tvOS, or visionOS and needs shared-domain design, adaptive UI, capability boundaries, navigation, input, scenes, storage, or conditional compilation. Do not use for a single-platform feature or for non-Apple cross-platform frameworks.
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
# Cross-Platform App Development Skill Share product behavior and domain logic while preserving each platform's interaction model. “Compiles everywhere” is a starting point, not proof of a good multi-platform experience. ## Stable baseline Primary examples use Xcode 15 and Swift 5.9 with these deployment targets: - iOS/iPadOS/Mac Catalyst 17 - macOS 14 - watchOS 10 - tvOS 17 - visionOS 1 The same architecture can support older systems, but APIs must be checked and gated at the real minimum. `NavigationStack`, `NavigationSplitView`, and `ViewThatFits` begin with the iOS 16/macOS 13/tvOS 16/watchOS 9 generation; visionOS starts at 1.0. OS 27-cycle APIs are beta relative to stable Xcode 26.6 and require explicit user intent, beta labeling, a stable fallback, and availability checks. ## Start with a target matrix Record this before generating code: | Target | Minimum | Window model | Primary input | Navigation | Persistence/sync | Key capabilities | |---|---:|---|---|---|---|---| | iPhone/iPad | project-specific | scenes, multitasking | touch, pencil, keyboard | stack or split | local and/or cloud | cameras, sensors, share extensions | …
Read the whole file at its exact version.
How to install
mdr add fal3/claude-skills-collection/Cross-Platform App Development Skill@sha256:e3cee1142955354eThe line at the top of this page pins the label git:20260814.a9c26d7, 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_rqat4mdk2bdbgxdh)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Oct 22, 2025 and Aug 14, 2026, about one every 296 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260814.a9c26d7 latest | 2026-08-14 | a9c26d7 | 7,877 B | A | view · diff |
| v1 | 2025-10-22 | 4c2260c | 11,461 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 (7877 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
fal3/claude-skills-collection · 20 stars · license MIT · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rqat4mdk2bdbgxdh GET https://markdownregistry.com/api/v1/resolve?ref=fal3/claude-skills-collection/Cross-Platform App Development Skill GET https://markdownregistry.com/api/v1/blob/e3cee1142955354e994119c0701300e0f1450e801ae8026c207b8f9801c00828
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.