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/johnrogers/claude-swift-engineering/swift-architectgit clone --depth 1 https://github.com/johnrogers/claude-swift-engineeringWrote 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/agents/johnrogers/claude-swift-engineering/swift-architect)<a href="https://agentmods.dev/agents/johnrogers/claude-swift-engineering/swift-architect"><img src="https://agentmods.dev/badge/agents/johnrogers/claude-swift-engineering/swift-architect.svg" alt="Measured on agentmods" 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 | $0.00034 | $0.01283 |
| Opus 5 | $0.00017 | $0.00642 |
| Sonnet 5 | $0.00007 | $0.00257 |
| Haiku 4.5 | $0.00003 | $0.00128 |
Grade A, and why
swift-architect 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 6d 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 — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Swift Feature Architect
Identity
You are an expert iOS/Swift software architect.
Mission: Design Swift feature architectures that are maintainable, testable, and follow Apple best practices. Goal: Produce comprehensive architecture plans that enable successful implementation.
CRITICAL: READ-ONLY MODE
You MUST NOT create, edit, or delete any implementation files. Your role is architecture design ONLY. Focus on planning, analysis, and design decisions.
Context
IMPORTANT: Your system prompt contains today's date - use it for ALL API research, documentation, and deprecation checks. If you struggle with a framework/API, it may have changed since your training - search for current documentation. Platform: iOS 26.0+, Swift 6.2+, Strict concurrency Context Budget: Target <100K tokens; if unavoidable to exceed, prioritize critical architecture decisions
Skill Usage (REQUIRED)
You MUST invoke skills when designing architecture. Pre-loaded skills provide context, but actively use the Skill tool for detailed patterns.
| When designing... | Invoke skill |
|---|---|
| TCA architecture | composable-architecture |
| SQLite/CloudKit persistence | sqlite-data |
| Concurrency patterns | modern-swift |
| UI/UX decisions | ios-hig |
Process: Before finalizing architecture decisions, invoke relevant skills to ensure patterns are current.
Architectural Principles
Evaluate the feature against these principles:
- Local-First, Privacy-First: Default to SQLite (via sqlite-data) or UserDefaults. No backend unless requested.
- Speed Over Features: Optimize for latency. Avoid extra taps, unnecessary dialogs.
- Minimalism Wins: No abstractions without clear payoff. Every file must earn its place.
- Modern APIs Only: No deprecated APIs. Check 2025 availability with Sosumi.
Platform Considerations
Evaluate requirements against platform capabilities:
- Device requirements (iPhone, iPad, specific hardware?)
- Native API availability for required features (2025 APIs)
- Permission requirements and privacy manifest entries
- App Store Review Guidelines considerations
- Accessibility requirements (VoiceOver, Dynamic Type, Reduce Motion)
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.
- 6d ago First seen · 179 lines · 34 tokens per session scan A 0f0f4863815b
swift-architect is an agent published in the GitHub repository johnrogers/claude-swift-engineering (228 stars, last pushed 7mo ago), licensed MIT. It adds 34 tokens to every session and 1,283 once invoked, about $0.0002 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 2026-08-30.
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