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.
git clone --depth 1 https://github.com/moasq/ios-dev-agentWrote 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/rules/moasq/ios-dev-agent/swift-conventions)<a href="https://agentmods.dev/rules/moasq/ios-dev-agent/swift-conventions"><img src="https://agentmods.dev/badge/rules/moasq/ios-dev-agent/swift-conventions/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/rules/moasq/ios-dev-agent/swift-conventions"><img src="https://agentmods.dev/badge/rules/moasq/ios-dev-agent/swift-conventions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01140 | $0.01140 |
| Opus 5 | $0.00570 | $0.00570 |
| Sonnet 5 | $0.00228 | $0.00228 |
| Haiku 4.5 | $0.00114 | $0.00114 |
Grade A, and why
swift-conventions 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 5d 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 — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Swift Conventions
Platform Requirements
- Swift 6 language version
- iOS 26+ deployment target
- SwiftUI-first architecture. UIKit is allowed only when no viable SwiftUI equivalent exists for a required feature.
- No Storyboards or XIBs
Allowed Frameworks
Only import from this list:
SwiftUIFoundationSwiftDataObservationOSLog(for logging)UIKit(only for required bridges or APIs without a SwiftUI equivalent)PhotosUI(only when the app requires photo picking)AVFoundation(only when the app requires audio/video)MapKit(only when the app requires maps)CoreLocation(only when the app requires location)
API Preferences
Use modern APIs — avoid deprecated alternatives:
| Use This | Not This |
|---|---|
foregroundStyle() |
foregroundColor() |
clipShape(.rect(cornerRadius:)) |
.cornerRadius() |
@Observable |
ObservableObject |
@State with @Observable |
@StateObject |
.onChange(of:) { new in } |
.onChange(of:) { old, new in } (iOS 17+ form) |
.task { await … } |
.onAppear { Task { await … } } (use .task for async work) |
.onAppear { } |
(acceptable for synchronous setup like passing modelContext) |
NavigationStack |
NavigationView |
Swift 6 Concurrency Safety
Swift 6 enables strict concurrency checking by default. All data races are compile-time errors.
Sendable Conformance
- All types that cross isolation boundaries MUST conform to
Sendable. - Value types (structs, enums) with only Sendable stored properties are implicitly Sendable.
- Reference types (classes) must be
finaland have only immutable (let) Sendable stored properties, OR be marked@unchecked Sendablewith manual thread safety (mutex/lock). - Closures that cross isolation boundaries must be
@Sendable— they cannot capture mutable local state.
@MainActor Isolation
- ViewModels that update
@Publishedor@Observablestate MUST be annotated@MainActor. - Services that read/write UI-bound state MUST be
@MainActor. - SwiftUI Views are implicitly
@MainActor, so@State var vm: SomeViewModelworks ifSomeViewModelis@MainActor. - Use
@MainActoron the class/actor declaration, not on individual methods — partial isolation causes confusing errors.
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.
- 5d ago First seen · 98 lines · 1,140 tokens per session scan A 2f78e206020a
swift-conventions is a cursor rule published in the GitHub repository moasq/ios-dev-agent (4 stars, last pushed 3mo ago), licensed MIT. It adds 1,140 tokens to every session, about $0.0057 per session on Opus 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.
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trove-swift
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