Developer Tools & Repos Agent Skills for Cursor

When to activate: Bundler, Gemfile, Gemfile.lock, pessimistic version operator, bundle groups, bundle audit, gemspec, private gem sources…

Expert skill for bytecode virtual machine design including instruction set design, dispatch mechanisms, and stack/register architectures

When to activate: C++ build, CMake, sanitizers, ASan, UBSan, TSan, clang-tidy, clang-format, vcpkg, Conan, CI, static analysis

When to activate: C++ concurrency, std::thread, mutex, atomic, future, promise, coroutines, thread pool, parallel algorithms

Use when lINQ (Language Integrated Query) with query and method syntax, deferred execution, expression trees, and performance optimization.

When to activate: smart pointers, unique_ptr, shared_ptr, weak_ptr, memory management, custom allocators, RAII, memory leaks, heap, stack…

Use this skill whenever the user asks to write, review, debug, optimize, test, fuzz, port, harden, profile, refactor, modernize, or design…

Use when c systems programming including file I/O, processes, signals, and system calls for low-level system interaction.

Use when C++ templates and metaprogramming including template specialization, SFINAE, type traits, and C++20 concepts.

This skill should be used when the user asks "how do I stop a thundering herd", "why does load spike when a cache key expires", "how…

Analyzes PHP code for caching opportunities and issues.

Create and maintain source-bound SagaSmith Call of Cthulhu 7e campaigns.

Use this agent to scan Swift code for camera, video, and audio capture issues including deprecated APIs, missing interruption handlers…

This skill should be used when the user asks to "pressure test my campaign", "stress test this module", "find plot holes", "what if…

Use when building or reviewing Canvas 2D, Three.js/WebGL, React Three Fiber, GLSL shaders, ShaderToy-to-WebGL adaptation, 2D/3D…

Generates paste-ready Power Apps Canvas App YAML.

Guides the agent through migrating an existing Capacitor app project from CocoaPods to Swift Package Manager (SPM) for iOS dependency…

Guides the agent through general Capacitor app development topics.

Guides the agent through upgrading a Capacitor app from v6 to v7.

Guides the agent through upgrading a Capacitor app from v7 to v8.

Model Context Protocol (MCP) tools for Capacitor mobile development.