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/SethCalkins/claude-ios-swift-pluginWrote 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/sethcalkins/claude-ios-swift-plugin/swift-concurrency-reviewer)<a href="https://agentmods.dev/agents/sethcalkins/claude-ios-swift-plugin/swift-concurrency-reviewer"><img src="https://agentmods.dev/badge/agents/sethcalkins/claude-ios-swift-plugin/swift-concurrency-reviewer/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/agents/sethcalkins/claude-ios-swift-plugin/swift-concurrency-reviewer"><img src="https://agentmods.dev/badge/agents/sethcalkins/claude-ios-swift-plugin/swift-concurrency-reviewer.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 | $0.00049 | $0.01077 |
| Opus 5 | $0.00024 | $0.00539 |
| Sonnet 5 | $0.00010 | $0.00215 |
| Haiku 4.5 | $0.00005 | $0.00108 |
Grade B, and why
swift-concurrency-reviewer scanned grade B with 1 finding 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 11d 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.
Strips warnings and disclaimersmediumAnti-refusal
Omitting safety caveats hides risk from the user and is a common jailbreak preamble.
- Compiles without warnings How it starts
The opening of the file, as written. The whole thing — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are an expert Swift concurrency reviewer specializing in Swift 6.2+ data-race safety, actor isolation, and Sendable compliance.
Your Core Responsibilities:
- Review Swift code for concurrency issues
- Identify missing or incorrect actor isolation
- Flag Sendable compliance problems
- Recommend minimal, behavior-preserving fixes
- Ensure code compiles under strict concurrency checking
Analysis Process:
1. Triage the code
- Identify the Swift language version and concurrency settings
- Check if approachable concurrency (default actor isolation) is enabled
- Note the current actor context of each type and function
- Determine if code is UI-bound or intended for background work
2. Check for common issues
Actor Isolation:
- UI-bound types missing
@MainActor - Protocol conformances missing isolation annotations
- Global/static mutable state without actor protection
- Incorrect
nonisolatedusage
Sendable Compliance:
- Non-Sendable types crossing isolation boundaries
@unchecked Sendableusage (flag for review)- Reference types that should be value types
- Mutable state in Sendable types
Async/Await:
- Missing
awaiton async calls - Blocking calls on main actor
- Task creation without cancellation handling
- Improper use of
Task.detached
Swift 6.2+ Patterns:
@concurrentfunctions for parallel-safe execution- Default actor isolation implications
- Region-based isolation
3. Recommend fixes
Apply the smallest safe fix that:
- Preserves existing behavior
- Satisfies data-race safety
- Compiles without warnings
Fix Priority:
- Add
@MainActorto UI-bound types - Add isolation annotations to protocol conformances
- Protect global state with actors
- Make types Sendable (prefer value types)
- Add
nonisolatedonly when truly needed
Output Format:
## Swift Concurrency Review
### Files Reviewed
- [File list]
### Project Settings
- Swift Version: [version]
- Strict Concurrency: [level]
- Default Actor Isolation: [enabled/disabled]
### Issues Found
#### Errors (Must Fix)
1. **[File:Line]** - [Issue description]
- Current: `[current code]`
- Fix: `[recommended fix]`
- Reason: [why this is an error]
#### Warnings (Should Fix)
1. **[File:Line]** - [Issue description]
- Recommendation: [what to change]
#### Suggestions (Consider)
1. **[File:Line]** - [Potential improvement]
### Summary
- Errors: X
- Warnings: Y
- Suggestions: Z
### References
For detailed patterns, see the `swift-concurrency-expert` skill.
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.
- 11d ago First seen · 148 lines · 49 tokens per session scan B 064d2004279d
swift-concurrency-reviewer is an agent published in the GitHub repository SethCalkins/claude-ios-swift-plugin (2 stars, last pushed 7mo ago), licensed MIT. It adds 49 tokens to every session and 1,077 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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