Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add aj-geddes/useful-ai-prompts --skill ios-swift-developmentgit clone --depth 1 https://github.com/aj-geddes/useful-ai-promptsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/ios-swift-development)<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/ios-swift-development"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/ios-swift-development/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/ios-swift-development"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/ios-swift-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00036 | $0.00573 |
| Opus 5.5 | $0.00014 | $0.00229 |
| Sonnet 5.5 | $0.00007 | $0.00115 |
| Haiku 4.5 | $0.00004 | $0.00057 |
Grade A, and why
ios-swift-development scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
iOS Swift Development
Table of Contents
Overview
Build high-performance native iOS applications using Swift with modern frameworks including SwiftUI, Combine, and async/await patterns.
When to Use
- Creating native iOS applications with optimal performance
- Leveraging iOS-specific features and APIs
- Building apps that require tight hardware integration
- Using SwiftUI for declarative UI development
- Implementing complex animations and transitions
Quick Start
Minimal working example:
import Foundation
import Combine
struct User: Codable, Identifiable {
let id: UUID
var name: String
var email: String
}
class UserViewModel: ObservableObject {
@Published var user: User?
@Published var isLoading = false
@Published var errorMessage: String?
private let networkService: NetworkService
init(networkService: NetworkService = .shared) {
self.networkService = networkService
}
@MainActor
func fetchUser(id: UUID) async {
isLoading = true
errorMessage = nil
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| MVVM Architecture Setup | MVVM Architecture Setup |
| Network Service with URLSession | Network Service with URLSession |
| SwiftUI Views | SwiftUI Views |
Best Practices
✅ DO
- Use SwiftUI for modern UI development
- Implement MVVM architecture
- Use async/await patterns
- Store sensitive data in Keychain
- Handle errors gracefully
- Use @StateObject for ViewModels
- Validate API responses properly
- Implement Core Data for persistence
- Test on multiple iOS versions
- Use dependency injection
- Follow Swift style guidelines
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 102 lines · 36 tokens per session scan A 31bad95a4757
ios-swift-development is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (376 stars, last pushed 8mo ago), licensed MIT. It adds 36 tokens to every session and 573 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
ios-swift-development compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| ios-swift-developmentaj-geddes/useful-ai-prompts | Skill | 376 | 8mo ago | MIT | A | 36 | Claude Code, Codex |
| wear-compose-m3android/skills | Skill | 10k | yesterday | Apache-2.0 | A | 91 | Claude Code |
| ink-custom-brush-builderandroid/skills | Skill | 10k | yesterday | Apache-2.0 | A | 159 | Claude Code |
| kotlin-specialistJeffallan/claude-skills | Skill | 12k | 7d ago | MIT | A | 86 | Claude Code |
| swiftui-devOrkas-AI/Orkas | Skill | 9.0k | yesterday | MIT | A | 3 | Claude Code, Codex |
| build-android-binarymicrosoft/power-platform-skills | Skill | 1.1k | yesterday | MIT | A | 150 | Claude Code |
| kotlin-androidericrisco/rsc-harness | Skill | 503 | 2d ago | MIT | A | 78 | Claude Code, Codex |