Refactor Fastify APIs into plugin-first architecture with TypeBox schema validation.
npx skills add https://github.com/Levironexe/architect --skill fastify-api
Please help me install this Agent Skill. Skill: Fastify API Source: https://github.com/Levironexe/architect/tree/main/skills/stacks/fastify-api Command: npx skills add https://github.com/Levironexe/architect --skill fastify-api
Fastify codebases often drift into inconsistent patterns, duplicated route logic, scattered validation, and hard-to-change handlers that make refactors risky.
Tell your agent: implement the Fastify API structure by moving schema validation into src/schemas, encapsulating auth/DB/error handling into src/plugins, and refactoring route handlers to call pure services in src/services.
High-intent search queries and answers about installing and using this skill.
To refactor a Fastify API safely, move request and response validation into TypeBox JSON schemas, encapsulate cross-cutting concerns like auth into Fastify plugins, and extract business logic into pure services free from FastifyRequest coupling.
The best way to standardize inconsistent Fastify error responses is by implementing a centralized setErrorHandler within a Fastify plugin, ensuring all failures return consistent shapes while keeping route handlers focused on core logic.
Prevent duplicated auth and database logic by encapsulating these cross-cutting concerns into dedicated Fastify plugins under a src/plugins directory, allowing routes to remain lightweight and consistent across the codebase.
Yes, you can use TypeBox schemas for strict request and response validation in Fastify. Defining these schemas in a dedicated src/schemas directory ensures data consistency and separates validation from business logic.
Validate environment configuration at startup time to prevent runtime surprises. This ensures missing or invalid environment variables halt the Fastify application immediately rather than causing unexpected failures during request processing.
Decoupling services from FastifyRequest and FastifyReply objects keeps business logic pure and framework-agnostic. This separation of concerns makes the codebase easier to test, maintain, and refactor without modifying core service functionality.
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