{"product_id":"master-gcd-operations-ai-skills-for-ios-macos-concurrency","title":"Master GCD Operations: AI Skills for iOS\/macOS Concurrency","description":"\u003ch3\u003eMaster GCD Operations: AI Skills for iOS\/macOS Concurrency\u003c\/h3\u003e\n\u003cp\u003eThis AI skill package is designed to support developers in addressing iOS and macOS concurrency issues using Grand Central Dispatch (GCD) and OperationQueue. It is tailored for scenarios involving dispatch queues, thread safety, and lock mechanisms, ensuring smooth integration and operation within Apple platform code.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this skill does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIdentifies deadlocks such as sync on main, nested sync, and ABBA lock ordering.\u003c\/li\u003e\n  \u003cli\u003ePrevents thread explosion due to excessive DispatchQueue.global() calls.\u003c\/li\u003e\n  \u003cli\u003eDetects data races through integration with Thread Sanitizer (TSan).\u003c\/li\u003e\n  \u003cli\u003eManages DispatchGroup enter\/leave imbalances.\u003c\/li\u003e\n  \u003cli\u003ePrevents DispatchSource timer leaks.\u003c\/li\u003e\n  \u003cli\u003eAssists with lock selection including NSLock, OSAllocatedUnfairLock, and os_unfair_lock.\u003c\/li\u003e\n  \u003cli\u003eSupports reader-writer barriers on custom concurrent queues.\u003c\/li\u003e\n  \u003cli\u003eFacilitates migration to Swift Concurrency actors.\u003c\/li\u003e\n  \u003cli\u003eAddresses risks when using AsyncOperation subclasses, dispatchPrecondition, and OperationQueue throttling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho it is for\u003c\/h3\u003e\n\u003cp\u003eThis skill package is meant for developers and development teams working with AI coding agents such as Claude Code, Cursor, and Codex, specifically those dealing with complex concurrency issues on Apple platforms.\u003c\/p\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLaying out dependency graphs and cancellations in app development using OperationQueue.\u003c\/li\u003e\n  \u003cli\u003eEnsuring thread safety in performance-critical paths using GCD.\u003c\/li\u003e\n  \u003cli\u003eImproving concurrency patterns when transitioning from GCD to Swift Concurrency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cp\u003eThis skill utilizes a structured approach to applying GCD and OperationQueue for enterprise-grade concurrency solutions. It prescribes serial queues by default, emphasizes target queue hierarchies, and recommends the use of labeled queues for improved code clarity and maintenance. While GCD is not deprecated, it remains integral for parallelism and performance optimization.\u003c\/p\u003e\n\u003c!-- mcpcart:static-blocks:start --\u003e\n\u003chr\u003e\n\u003ch3\u003eSource \u0026amp; Licence\u003c\/h3\u003e\n\u003cp\u003eThis package is built on open-source work published by \u003cstrong\u003erusel95\u003c\/strong\u003e (\u003ca href=\"https:\/\/github.com\/rusel95\/ios-agent-skills\" rel=\"nofollow noopener\" target=\"_blank\"\u003erusel95\/ios-agent-skills\u003c\/a\u003e) and distributed under \u003cstrong\u003eMIT\u003c\/strong\u003e. The original licence text and copyright notice are included in your download.\u003c\/p\u003e\n\u003cp\u003ePersonal and commercial use, modification and redistribution are permitted, provided the original copyright and licence notice are retained.\u003c\/p\u003e\n\u003cp\u003eYour purchase covers curation, licence verification, packaging, documentation and instant delivery. It does not grant exclusive rights to the underlying open-source code, which remains available under its original licence.\u003c\/p\u003e\n\u003ch3\u003eDelivery \u0026amp; Support\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDelivery:\u003c\/strong\u003e instant — a secure download link is emailed to you as soon as payment is confirmed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e ZIP archive containing the skill files, documentation and the original licence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport:\u003c\/strong\u003e \u003ca href=\"mailto:support@mcpcart.com\"\u003esupport@mcpcart.com\u003c\/a\u003e — we aim to reply within 2 business days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpdates:\u003c\/strong\u003e updates are included only where stated on this page.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRefunds\u003c\/h3\u003e\n\u003cp\u003eThis is a digital product delivered immediately after purchase. By completing your order you request immediate delivery and acknowledge that, once the download has been accessed, the statutory right to cancel no longer applies to the extent permitted by law. Refund requests are handled in accordance with our published Refund Policy.\u003c\/p\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003eClaude, Codex, Gemini and Cursor are trademarks of their respective owners. MCP Cart is an independent marketplace and is not affiliated with, endorsed by, or sponsored by any of them. Compatibility references describe interoperability only.\u003c\/p\u003e\n\u003c!-- mcpcart:static-blocks:end --\u003e","brand":"MCP Cart","offers":[{"title":"Default Title","offer_id":53014657597751,"sku":"MCP-RUSEL95-IOS-AGENT-SKILLS-GCD-OPERATIONS","price":23.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3950\/4951\/files\/OK9G4IwUuDSLt-tXa6eSf_f75ee12dffc54834aef464e6e47001a1.jpg?v=1789898628","url":"https:\/\/mcpcart.com\/products\/master-gcd-operations-ai-skills-for-ios-macos-concurrency","provider":"SPF PRO","version":"1.0","type":"link"}