fastify-best-practices
by mcollinafastify-best-practices skill for Backend Development with Fastify Node.js APIs and services using TypeScript or JavaScript. Use it to choose plugin structure, define routes, validate schemas, handle errors, manage auth, logging, CORS, databases, WebSockets, testing, and production deployment. Includes fastify-best-practices guide content for practical usage.
This skill scores 78/100, which means it is a solid listing candidate for Agent Skills Finder. Directory users get a clearly triggerable Fastify-focused workflow with enough practical guidance to justify installation, though it is more a best-practices playbook than a fully self-operating toolchain.
- Explicit trigger terms and use cases for Fastify app development, debugging, routes, plugins, validation, auth, CORS, databases, WebSockets, and deployment.
- Strong operational content: a runnable quick start plus 19 rule files covering core Fastify workflows and request lifecycle topics.
- Good progressive disclosure: the main skill points users to scenario-specific rule files, helping agents navigate to the right guidance with less guesswork.
- No install command in SKILL.md, so adoption requires users to infer setup from the repository rather than follow a direct install flow.
- The repository appears documentation-heavy rather than execution-heavy; there are no scripts or support files to automate validation or demonstrate end-to-end task completion.
Overview of fastify-best-practices skill
What this skill is for
fastify-best-practices is a practical Fastify guidance skill for building and debugging Node.js backends, APIs, and services with TypeScript or JavaScript. It is most useful when you need fastify-best-practices for Backend Development: choosing the right plugin pattern, wiring routes, validating payloads, handling auth, or avoiding common Fastify mistakes that slow delivery.
Who should use it
Use this fastify-best-practices skill if you are starting a new Fastify app, refactoring an existing one, or trying to make a production service safer and easier to maintain. It fits backend developers who want more than a generic prompt and need advice that reflects Fastify’s lifecycle, encapsulation model, and plugin ecosystem.
What it differentiates
The value is not just “use Fastify”; it points you toward the pieces that usually block adoption: route structure, schema-driven validation, serialization, logging, CORS, error handling, databases, WebSockets, and deployment. It also helps with TypeScript integration, including strip types, so the advice stays close to how real Fastify code is actually organized.
How to Use fastify-best-practices skill
Install fastify-best-practices
Use the install path shown in the repo and then work from the skill file plus the supporting rules:
npx skills add mcollina/skills --skill fastify-best-practices
For a good fastify-best-practices install, confirm the skills/fastify folder is present and read SKILL.md before jumping into a generic prompt.
Turn your goal into a useful prompt
Strong fastify-best-practices usage starts with a concrete job, not “help me with Fastify.” Include:
- app type: REST API, webhook receiver, auth service, proxy, real-time app
- language: TypeScript or JavaScript
- current stack: database, auth provider, deployment target, test runner
- constraint: performance, maintainability, security, or migration
Example: “Review my Fastify TypeScript API design for auth, validation, and error handling; I use @fastify/jwt, Postgres, and want plugin boundaries that scale.”
Read the right files first
Start with SKILL.md, then inspect rules/plugins.md, rules/routes.md, rules/schemas.md, rules/error-handling.md, and rules/configuration.md. After that, open the rule files that match your problem, such as rules/authentication.md, rules/database.md, rules/logging.md, or rules/deployment.md.
Workflow that improves output quality
Use the skill in three passes: describe the system, ask for a recommended structure, then ask for review against the chosen rule files. If you are changing existing code, provide the relevant route, plugin, or config file instead of a full repository dump. The skill works best when your prompt names the exact Fastify concern you want solved.
fastify-best-practices skill FAQ
Is this better than a normal Fastify prompt?
Usually yes, because fastify-best-practices guide material is organized around concrete backend concerns instead of broad “best practices” advice. That reduces guesswork when you need a decision about plugins, schemas, hooks, or production setup.
Does it work for beginners?
Yes, if you already know basic Node.js and HTTP. It is beginner-friendly for Fastify because it points to specific files and scenarios, but it is not a substitute for learning JavaScript, TypeScript, or async server fundamentals first.
When should I not use it?
Do not reach for fastify-best-practices if your task is unrelated to Fastify or you only need a tiny one-off snippet. It is also a poor fit when you want framework-agnostic architecture advice without any Fastify-specific assumptions.
How does it fit the Fastify ecosystem?
It fits well when you use Fastify plugins and the @fastify/* ecosystem for auth, CORS, Postgres, and related server concerns. If your app is built around another framework or hidden middleware patterns, the skill may push you toward Fastify-native structure that does not match your stack.
How to Improve fastify-best-practices skill
Give the skill the decision context
The biggest improvement comes from stating what you are optimizing for: startup speed, request throughput, maintainability, security, or testability. For fastify-best-practices, those goals change the recommendation for schema strategy, logging level, plugin boundaries, and deployment shape.
Share the smallest relevant code slice
When asking for review, include the specific route, plugin, or config file that is failing, not the entire app. A narrow prompt like “fix my register order in server.ts and explain why encapsulation is breaking” produces better output than “analyze my repo.”
Name the rule area you want
The repo is split into topic files, so your prompt should point at the area that matters: auth, config, databases, serialization, hooks, performance, or testing. This is especially useful for fastify-best-practices usage because it helps the assistant pull the right rule logic instead of offering generic backend advice.
Iterate with a concrete target
After the first answer, ask for one improvement at a time: stricter schema validation, cleaner plugin separation, safer auth flow, or production-ready logging. If the output feels too abstract, request a version that is specific to your route shape and deployment constraints so the next pass is directly executable.