Developer Tools & Repos Agent Skills for Claude Code

When to activate: Core Web Vitals, LCP, INP, CLS, performance optimization, lazy loading, code splitting, resource hints

myfy web routing with FastAPI-like decorators.

Convert a web game idea (even a vague one like "build a Raiden-type game" or "make a card game") into a complete Codex /goal-ready Phaser…

Enforce SOLID principles in webhook architecture for maintainability and extensibility.

Use this skill when the user says 'webhook', 'webhook handler', 'webhook endpoint', 'receive events', 'HMAC verification', 'idempotency'…

Validate temporal relevance of webhook payloads at the handler boundary — webhooks arrive carrying a moment that has already passed, and…

Webpack/Vite/esbuild configuration optimization for build performance

Use when building real-time communication systems with WebSockets or Socket.IO.

Diagnoses and resolves touch and scroll leakage issues between mobile WebViews and native containers alongside JSBridge debugging.

Provider-specific setup for Weegloo ServiceLogin with Kakao (Kakao Login) OAuth 2.0 — the exact Kakao Developers steps to create an…

Algorithmic philosophies are computational aesthetic movements that are then expressed through code.

Game development orchestrator. Routes to platform-specific skills based on project needs.

Expert guide for writing efficient GLSL shaders (Vertex/Fragment) for web and game engines, covering syntax, uniforms, and common effects.

Three.js geometry creation - built-in shapes, BufferGeometry, custom geometry, instancing.

Summarize code changes briefly and accurately from Git evidence.

Enforces Flutter widget composition — extract named const Widget classes never `Widget _buildX()` methods, lean build() (no…

Enforces a disciplined widget/layout/golden/a11y test surface — one pumpApp harness that pins tester.view.physicalSize x devicePixelRatio…

When to activate: WidgetKit, widget timelines, AppIntents, interactive widgets, widget configuration, SwiftUI widget views

Expert guidance for Windows, PowerShell, WSL interop, and cross-platform development

Build, troubleshoot, or set up native Windows C and C++ compilation with MinGW-w64, MSYS2, GCC, G++, Clang, LLVM, mingw32-make, static…

Use when grep/ripgrep fails on Windows due to paths with backslash-space sequences creating malformed paths like 'nul' from \n+ul