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 Aarvion-AI/stackwise-skills --skill swiftui-expertgit clone --depth 1 https://github.com/Aarvion-AI/stackwise-skillsWrote 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/aarvion-ai/stackwise-skills/swiftui-expert)<a href="https://agentmods.dev/skills/aarvion-ai/stackwise-skills/swiftui-expert"><img src="https://agentmods.dev/badge/skills/aarvion-ai/stackwise-skills/swiftui-expert/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/aarvion-ai/stackwise-skills/swiftui-expert"><img src="https://agentmods.dev/badge/skills/aarvion-ai/stackwise-skills/swiftui-expert.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 | $0.00151 | $0.02509 |
| Opus 5 | $0.00076 | $0.01255 |
| Sonnet 5 | $0.00030 | $0.00502 |
| Haiku 4.5 | $0.00015 | $0.00251 |
Grade A, and why
swiftui-expert 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 9d 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 — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SwiftUI Expert
Turns Claude into a senior iOS engineer who ships Swift 6 / iOS 18+ SwiftUI - Observation-based state, strict concurrency that compiles, SwiftData, NavigationStack - instead of the ObservableObject/NavigationView idioms that dominate training data.
When to Use This Skill
- Building screens, components, or features in a SwiftUI app
- Wiring state with the Observation framework (
@Observable,@Bindable,@State) or migrating offObservableObject/@Published - Fixing Swift 6 strict-concurrency compile errors (Sendable, actor isolation,
@MainActor) - Navigation with
NavigationStack/NavigationPath: programmatic routing, deep links, split views - Persistence with SwiftData (
@Model,@Query) or deciding SwiftData vs Core Data - Async/await networking with URLSession and dependency injection via
@Environment - Diagnosing unnecessary
bodyre-evaluation, view-identity bugs, or slow lists - Writing Swift Testing (
@Test,#expect) and XCTest/XCUITest suites, including accessibility identifiers for UI testability
Core Workflow
- Analyze - Read the project first: deployment target and
SWIFT_VERSION/SWIFT_STRICT_CONCURRENCY(and Swift 6.2 default-isolation settings) in project.pbxproj orPackage.swift, existing state pattern (Observation vs legacy ObservableObject), navigation setup, persistence layer, and test targets. List schemes/simulators withxcodebuild -listandxcrun simctl list devices available. Match the project's conventions; propose migration only when the task is a migration. - Implement - Write the change with current idioms:
@Observableclasses owned by@Stateand injected via.environment(...), value-type views,NavigationStackwith typed paths, structured concurrency (async let,TaskGroup) over unstructuredTask {}, SwiftData@Model/@Querywhere the project uses it. Add.accessibilityIdentifier(...)to any interactive element a UI test will need. - Verify build - Run
xcodebuild -scheme <Scheme> -destination 'platform=iOS Simulator,name=iPhone 16' build(orswift buildfor a package); fix all reported issues and re-run until clean before proceeding. Treat concurrency warnings as errors - under Swift 6 language mode they are. - Lint - Run
swiftlint(useswiftlint --strictif the project's CI does); fix all reported issues and re-run until clean. Respect the project's.swiftlint.yml; do not disable rules inline to silence findings. - Test - Write or update tests for the change (Swift Testing
@Test/#expectfor new tests; keep existing XCTest suites in their framework), then runxcodebuild -scheme <Scheme> -destination 'platform=iOS Simulator,name=iPhone 16' test(orswift testfor a package); fix all failures and re-run until every test passes. - Prove it works - Exercise the changed flow: confirm the relevant
#Previewrenders the states you touched (loading/error/data), or build-and-run on a simulator (xcrun simctl launch) and walk the flow. For performance work, verify in Instruments (SwiftUI template: View Body / Cause & Effect) that body re-evaluation actually dropped.
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.
- 9d ago First seen · 146 lines · 151 tokens per session scan A 30b925268b18
swiftui-expert is a skill published in the GitHub repository Aarvion-AI/stackwise-skills (5 stars, last pushed 6d ago), licensed MIT. It adds 151 tokens to every session and 2,509 once invoked, about $0.0008 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 2026-08-31.
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