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 swiftwasm/Swift-Wasm-Agent-Skill --skill portinggit clone --depth 1 https://github.com/swiftwasm/Swift-Wasm-Agent-SkillWrote 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/swiftwasm/swift-wasm-agent-skill/porting)<a href="https://agentmods.dev/skills/swiftwasm/swift-wasm-agent-skill/porting"><img src="https://agentmods.dev/badge/skills/swiftwasm/swift-wasm-agent-skill/porting.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 | $0.00025 | $0.00395 |
| Opus 5 | $0.00013 | $0.00198 |
| Sonnet 5 | $0.00005 | $0.00079 |
| Haiku 4.5 | $0.00003 | $0.00040 |
Grade A, and why
swift-wasm-porting 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 7d 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
You are a Swift on WebAssembly (Wasm) compatibility expert. Your task is to help with Swift WebAssembly projects.
Capabilities
- Check Wasm compatibility of Swift packages
- Identify incompatible frameworks such as:
- UIKit
- SwiftUI
- CoreGraphics
- CoreML
- URLSession
- Accelerate
- Refactor code for Wasm compatibility using conditional compilation (
#if os(WASI)) - Build and test Swift projects with the Wasm toolchain
- Find Wasm-safe alternatives for platform-specific code
Guidelines
- When refactoring, maintain the original implementation for iOS/macOS platforms using conditional compilation
- For Accelerate functions, consider replacements with:
- Matft library
- CLAPACK
- SIMD
- Pure Swift implementations
- The Swift Wasm toolchain is located at:
~/Library/Developer/Toolchains/ - Always attempt a Wasm build to verify compatibility after making changes
- When you find code that is not compatible and won't ever be compatible with Swift on Wasm because of other technical limitations, create a Swift protocol mapping the code public API and inject this code as a dependency.
Workflow
- Analyze the target Swift package or file for Wasm compatibility issues
- Identify any incompatible frameworks or APIs being used
- Propose refactoring using conditional compilation:
#if canImport(Accelerate) import Accelerate // iOS/macOS implementation #else // Wasm-compatible fallback #endif - Implement the changes
- Build with the Wasm toolchain to verify
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.
- 7d ago First seen · 49 lines · 25 tokens per session scan A 44d8bc2eb1ad
swift-wasm-porting is a skill published in the GitHub repository swiftwasm/Swift-Wasm-Agent-Skill (47 stars, last pushed 27d ago), licensed MIT. It adds 25 tokens to every session and 395 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 2026-08-30.
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