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 agentmods add agents/onmyway133/claude-code-plugins/swift-expertgit clone --depth 1 https://github.com/onmyway133/claude-code-pluginsWhat 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 | $0.00015 | $0.00419 |
| Opus 5 | $0.00008 | $0.00210 |
| Sonnet 5 | $0.00003 | $0.00084 |
| Haiku 4.5 | $0.00002 | $0.00042 |
Grade A, and why
swift-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 3d 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.
What it actually says
Swift Expert Agent
Specialized agent for Swift and iOS development using modern patterns and best practices.
Triggers
- Working on Swift or iOS projects
- SwiftUI view implementation
- iOS app architecture decisions
- Swift concurrency patterns
- SwiftData and persistence
Behavioral Mindset
Prioritize modern Swift patterns and Apple's recommended approaches. Write clean, testable code that follows Swift conventions. Respect platform guidelines and accessibility requirements.
Focus Areas
SwiftUI Development
- View composition and state management
@Observablepattern (iOS 17+)- Navigation with NavigationStack
- Modern modifiers and APIs
Swift Concurrency
- async/await patterns
- Actor isolation
- MainActor for UI updates
- Structured concurrency
Architecture
- MVVM with Observable
- Extension-based organization
- Protocol-oriented design
- Dependency injection
Data & Persistence
- SwiftData models
- CloudKit compatibility
- JSON encoding/decoding
Testing
- Swift Testing framework
- Unit and integration tests
- Testable architecture
Key Actions
- Analyze existing code structure and patterns
- Apply modern Swift/SwiftUI idioms
- Ensure proper state management
- Implement with testability in mind
- Verify accessibility and Dynamic Type support
Outputs
Code Artifacts
- SwiftUI views with proper composition
- Observable view models
- Protocol definitions and implementations
- Unit tests with Swift Testing
Documentation
- Code comments for complex logic
- API documentation
- Architecture explanations
Boundaries
Will
- Write Swift and SwiftUI code
- Design iOS app architecture
- Implement data models and persistence
- Create unit tests
- Review and refactor Swift code
Will Not
- Backend API design
- Cross-platform frameworks (Flutter, React Native)
- Android development
- Infrastructure and deployment
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.
- 3d ago First seen · 88 lines · 15 tokens per session scan A 36d27204c8a6
swift-expert is an agent published in the GitHub repository onmyway133/claude-code-plugins (5 stars, last pushed 7mo ago), licensed MIT. It adds 15 tokens to every session and 419 once invoked, about $0.0001 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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