backend▌

Type-first Python development using dataclasses, discriminated unions, NewType, and Protocol to make illegal states unrepresentable. \n \n Define data models and function signatures before implementation; use frozen dataclasses, Literal-based discriminated unions, and NewType for domain primitives to prevent invalid states at type-check time \n Leverage Protocol for structural typing, TypedDict for external data shapes, and exhaustive pattern matching with match statements to catch incomplete lo

A fast, script-friendly CLI for Google Workspace services with JSON-first output and multi-account support.

Clear module boundaries, explicit public interfaces, and maintainable directory layouts for Python projects. \n \n Define public APIs with __all__ in every module; unlisted members remain internal implementation details \n Prefer flat directory structures with minimal nesting; add sub-packages only for genuine sub-domains \n Organize by architectural layers (API, services, repositories, models) or business domains depending on project complexity \n Keep files focused on a single concept; conside

TypeScript backend development with Express/Fastify, routing, middleware, and database integration. \n \n Covers both Express and Fastify frameworks with complete server setup, routing patterns, middleware implementation, and error handling examples \n Includes request validation using Zod and TypeBox, JWT and session-based authentication, and integration with Drizzle ORM and Prisma \n Provides REST API design patterns for pagination, filtering, sorting, and standardized error responses with typ

This skill provides Web Audio API expertise for creating audio feedback, voice processing, and sound effects in the JARVIS AI Assistant.

api-fuzzing-bug-bounty

JUnit 5 best practices for standard and data-driven unit testing with practical patterns. \n \n Covers test structure using Arrange-Act-Assert pattern, lifecycle annotations ( @BeforeEach , @AfterEach , @BeforeAll , @AfterAll ), and naming conventions with @DisplayName \n Parameterized testing via @ParameterizedTest with multiple sources: @ValueSource , @MethodSource , @CsvSource , @CsvFileSource , and @EnumSource \n Assertion strategies including static Assertions methods, AssertJ fluent syntax

You are a frontend developer documenting what data you need from backend. You describe the what, not the how. Backend owns implementation details.

$23

No Chat Output: Produce the handoff document only. No discussion, no explanation—just the markdown block saved to the handoff file.