Agent Scripts is a repository of shared instructions, reusable skills, helper scripts, and local safeguards for coding-agent workflows across multiple workspaces. It is for maintaining common agent behavior and portable development utilities between repositories.
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 steipete/agent-scripts --skill swift-concurrency-expertgit clone --depth 1 https://github.com/steipete/agent-scriptsWrote 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/steipete/agent-scripts/swift-concurrency-expert)<a href="https://agentmods.dev/skills/steipete/agent-scripts/swift-concurrency-expert"><img src="https://agentmods.dev/badge/skills/steipete/agent-scripts/swift-concurrency-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/steipete/agent-scripts/swift-concurrency-expert"><img src="https://agentmods.dev/badge/skills/steipete/agent-scripts/swift-concurrency-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00022 | $0.00390 |
| Opus 5.5 | $0.00009 | $0.00156 |
| Sonnet 5.5 | $0.00004 | $0.00078 |
| Haiku 4.5 | $0.00002 | $0.00039 |
Grade A, and why
swift-concurrency-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 1mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- swift-concurrency-expert — 86% identical, 4 lines differ
What it actually says
Swift Concurrency Expert
Attribution: copied from @Dimillian’s Dimillian/Skills (2025-12-31).
Overview
Review and fix Swift Concurrency issues in Swift 6.2+ codebases by applying actor isolation, Sendable safety, and modern concurrency patterns with minimal behavior changes.
Workflow
1. Triage the issue
- Capture the exact compiler diagnostics and the offending symbol(s).
- Identify the current actor context (
@MainActor,actor,nonisolated) and whether a default actor isolation mode is enabled. - Confirm whether the code is UI-bound or intended to run off the main actor.
2. Apply the smallest safe fix
Prefer edits that preserve existing behavior while satisfying data-race safety.
Common fixes:
- UI-bound types: annotate the type or relevant members with
@MainActor. - Protocol conformance on main actor types: make the conformance isolated (e.g.,
extension Foo: @MainActor SomeProtocol). - Global/static state: protect with
@MainActoror move into an actor. - Background work: move expensive work into a
@concurrentasync function on anonisolatedtype or use anactorto guard mutable state. - Sendable errors: prefer immutable/value types; add
Sendableconformance only when correct; avoid@unchecked Sendableunless you can prove thread safety.
Reference material
- See
references/swift-6-2-concurrency.mdfor Swift 6.2 changes, patterns, and examples. - See
references/swiftui-concurrency-tour-wwdc.mdfor SwiftUI-specific concurrency guidance.
What ships with it
2 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.
- 1mo ago First seen · 38 lines · 22 tokens per session scan A eaf45b132872
swift-concurrency-expert is a skill published in the GitHub repository steipete/agent-scripts (7,397 stars, last pushed 3d ago), licensed MIT. It adds 22 tokens to every session and 390 once invoked, about $0.0001 per session on Opus 5.5. 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.
Other skills, from other repositories
axiom-analyze-swift-performance
Use when the user mentions Swift performance audit, code optimization, or performance review — ARC issues, allocation patterns, and generic specialization.
kotlin-tooling-native-build-performance
Diagnoses and fixes slow Kotlin/Native compilation and linking in Kotlin Multiplatform projects that target iOS. Use when the user reports slow iOS or shared-framework builds, long linkDebug/linkRelease or XCFramework tasks, cold CI builds that re-download the Kotlin/Native toolchain, KSP or other generated code on…
xcode-compilation-analyzer
Analyze Swift and mixed-language compile hotspots using build timing summaries and Swift frontend diagnostics, then produce a recommend-first source-level optimization plan. Use when a developer reports slow compilation, type-checking warnings, expensive clean-build compile phases, long CompileSwiftSources tasks…
kotlin-coroutines-skill
Load, when a developer writes, reviews, or debugs Kotlin coroutine code and needs help spotting concurrency bugs — GlobalScope leaks, runBlocking in suspend, missing Flow catch, hardcoded or wrong dispatchers, unhandled timeouts, cancellation and structured-concurrency mistakes — or asks how to make async Kotlin…
kmp-architecture-footguns
Kotlin Multiplatform structure and language traps: module splits, expect/actual, Koin and ViewModel scoping, layers, version catalogs, erased overloads, Char and string-resource formatting limits. Use when shaping modules or DI, when a format specifier renders verbatim, or code misbehaves on one platform.
state-and-background-footguns
Reactive state and background-work traps: StateFlow conflation, flatMapLatest, job lifecycles, ViewModel bases, WorkManager, backups, crash reporting, logging, Glance widgets. Use when state lags or flips, or work runs twice or never.