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Found 198 Skills
Test Effect concurrency primitives including PubSub, Deferred, Latch, Fiber coordination, SubscriptionRef, and Stream. Use this skill when testing concurrent effects, event-driven systems, or fiber coordination.
Use when the user needs workflow orchestration such as branching, concurrency, approvals, waiting and resume, runtime stream, restart-safe execution, mixed sync/async function or module orchestration, event-driven fan-out, process-clarity refactors that make stages explicit, performance-oriented refactors that collapse split requests, or explicit draft-review-revise style multi-stage flows. The user does not need to say TriggerFlow explicitly.
Write, review, or fix Swift concurrency code using actors, async/await, and structured concurrency. Use when implementing concurrent features, resolving data race warnings, migrating from GCD, enabling Swift 6 strict concurrency mode, or adopting Swift 6.2 approachable concurrency (@concurrent, main-actor-by-default, isolated conformances).
Expert iOS development skill covering SwiftUI, UIKit, Core Data, App Store guidelines, and performance optimization. Use this skill when building, reviewing, or debugging iOS apps - views, navigation, data persistence, animations, or submission preparation. Triggers on SwiftUI layout and state management, UIKit view controller lifecycle, Core Data model design and migrations, App Store Review Guidelines compliance, memory and rendering performance profiling, and Swift concurrency patterns for iOS.
Idiomatic Go design patterns: functional options, builder, factory, strategy, middleware chain, pub/sub, and other patterns adapted for Go's type system. Use when: "design pattern", "functional options", "builder pattern", "factory pattern", "strategy pattern", "middleware chain", "option pattern", "how to structure this". Do NOT use for: interface design principles (use go-interface-design), package layout (use go-architecture-review), or concurrency patterns (use go-concurrency-review).
Python patterns for CLI tools, async concurrency, and backend services. Use when working with Python code, building CLI apps, FastAPI services, async with asyncio, background jobs, or configuring uv, ruff, ty, pytest, or pyproject.toml.
Concurrency with Effect.all, forEach concurrency, Fiber lifecycle, race and timeouts. Use for parallelizing tasks safely.
Use when needing thread-safe primitives for performance-critical code. Covers Mutex (iOS 18+), OSAllocatedUnfairLock (iOS 16+), Atomic types, when to use locks vs actors, deadlock prevention with Swift Concurrency.
Modern Rust development with cargo, rustc, clippy, rustfmt, async programming, and memory-safe systems programming. Covers ownership patterns, fearless concurrency, and the modern Rust ecosystem including Tokio, Serde, and popular crates. Use when user mentions Rust, cargo, rustc, clippy, rustfmt, ownership, borrowing, lifetimes, async Rust, or Rust crates.
Design distributed systems using Leslie Lamport's rigorous approach. Emphasizes formal reasoning, logical time, consensus protocols, and state machine replication. Use when building systems where correctness under concurrency and partial failure is critical.
Use for Roblox persistent data and cross-server state design: choosing between DataStoreService, OrderedDataStore, MemoryStoreService, and MessagingService; designing save and load flows, schema shape, versioning, metadata, retries, quotas, observability, and concurrency-safe coordination across servers.
Use when writing ANY async code, actors, threads, or seeing ANY concurrency error. Covers Swift 6 concurrency, @MainActor, Sendable, data races, async/await patterns.