Guidelines for developing with Sequelize, a promise-based Node.js ORM supporting PostgreSQL, MySQL, MariaDB, SQLite, and SQL Server

Help users build and scale internal platforms and technical infrastructure. Use when someone is deciding whether to build vs buy tooling, designing developer platforms, creating shared services,...

Identify capability gaps and propose new skills with prioritization. Use when analyzing missing capabilities, planning skill development, performing ontology expansion, or assessing coverage.

Manage Git worktrees for parallel Claude Code development. Use this skill when engineers ask to "create a worktree", "run parallel Claude sessions", "work on multiple features simultaneously", or...

Plan complex backend work by analyzing requirements and creating executable task sequences. Use this skill when breaking down API features, service architectures, database changes, or backend...

Expert guide for writing comprehensive API documentation including OpenAPI specs, endpoint references, authentication guides, and code examples. Use when documenting APIs, creating developer...

Use when building Kotlin applications requiring coroutines, multiplatform development, or Android with Compose. Invoke for Flow API, KMP projects, Ktor servers, DSL design, sealed classes.

Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+ coverage including unit, integration, and E2E tests.

Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+ coverage including unit, integration, and E2E tests.

Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+ coverage including unit, integration, and E2E tests.

Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+ coverage including unit, integration, and E2E tests.

Rust development patterns, project setup, CLI/TUI applications, error handling, and system integration

Help users develop product taste and intuition. Use when someone wants to improve their product judgment, struggles to evaluate design quality, needs to make decisions without complete data, or...

SystemVerilog development guidelines for FPGA and ASIC design covering modular design, verification, and timing optimization.

Perform native code review (< 30 seconds) using Claude Code's built-in capabilities without external dependencies. Use for rapid validation checks during development. Triggered by 'quick review',...

Provides TypeScript patterns for type-first development, making illegal states unrepresentable, exhaustive handling, and runtime validation. Must use when reading or writing TypeScript/JavaScript files.

Ionic development guidelines for building cross-platform mobile applications with Angular, Cordova, and Firebase integration.

FPGA development guidelines covering Vivado, SystemVerilog, timing closure, AXI interfaces, and hardware optimization.

Apply modern mobile development toolchain patterns: Expo (default), React Native, Tauri for iOS/Android apps. Use when building mobile applications, choosing cross-platform frameworks, or...

Go backend development best practices for microservices with clean architecture, observability, and production-ready patterns