Fastify Best Practise

This is a comprehensive ruleset that teaches Claude how to write production-grade Fastify applications. It covers 14 topic areas from server setup and plugin architecture to authentication, error handling, and TypeScript integration. Each rule includes side-by-side bad/good examples so Claude can catch common mistakes like skipping schema validation or misusing encapsulation. The autoload-based project structure is solid and the testing guidance around inject() and buildServer factories is genuinely helpful. If you're building anything more serious than a hello-world API with Fastify, this will push Claude toward patterns that actually scale instead of the quick-and-dirty snippets you'd find in a basic tutorial.

skills.sh installs: 358
GitHub stars: 16
last updated: Jun 3, 2026

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Install

$ npx -y skills add thecodepace/fastify-skills --skill fastify-best-practise --agent claude-code

Installs into .claude/skills of the current project.

Files

Fastify Best Practices

A curated set of rules and patterns for building production-ready Fastify applications. Each rule includes incorrect and correct examples with explanations.

How It Works

The agent identifies that the user is working with Fastify or asking about Fastify patterns
The relevant rule file is loaded based on the topic (routes, validation, encapsulation, etc.)
The agent applies the best practices from the rule when generating or reviewing code

Rules

The rules are organized by topic in the rules/ directory. Each rule follows a consistent format with impact rating, incorrect/correct examples, and references to official docs.

SKILL.md on GitHub

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