FNOSP

Use when creating agents, writing subagents, or needing guidance on agent structure, frontmatter, system prompts, triggers, and best practices for Claude Code plugins.

Idiomatic Go patterns, best practices, and conventions for building robust, efficient, and maintainable Go applications. Invoke when writing Go code, reviewing Go code, or designing Go packages.

Use when building Go applications requiring concurrent programming, microservices architecture, or high-performance systems. Invoke for goroutines, channels, Go generics, gRPC integration.

Go testing specialist for TDD workflow. Invoke when writing Go tests, table-driven tests, benchmarks, fuzzing, or ensuring test coverage. Enforces write-tests-first methodology.

UI/UX design intelligence. Invoke when user asks for UI design, improvement, review, or frontend implementation. Provides styles, palettes, fonts, and UX guidelines.

Use when building Vue 3 applications with Composition API, Nuxt 3, or Quasar. Invoke for Pinia, TypeScript, PWA, Capacitor mobile apps, Vite configuration.

Use when publishing a new release of FlyNarwhal desktop. Covers version bump, CHANGELOG editing, user confirmation, commit, tag, and push to trigger the release workflow.

Run and verify Flutter desktop behavior on Windows/macOS/Linux native clients. Invoke when developing, fixing, or testing PC features, user flows, interaction results, Dart MCP scenarios, or testability anchors like ValueKey.

Use when adding, modifying, or refactoring any remote/HTTP API call in this Flutter project. Invoke for new endpoints, data sources, repositories, providers, or when removing hardcoded URLs and inline response parsing.

Use when building iOS/macOS applications with Swift 5.9+, SwiftUI, or async/await concurrency. Invoke for protocol-oriented programming, SwiftUI state management, actors, server-side Swift.

Use when creating, writing, fixing, or reviewing tests in a Flutter project. Covers unit tests, widget tests, integration tests, Riverpod provider testing, and Mockito mocking. Provides Given-When-Then patterns, layer isolation strategies, and test setup for…