Deno Development Guidance

Overview

This skill provides foundational knowledge for building modern Deno applications. Deno is a secure JavaScript/TypeScript runtime that runs TypeScript directly, has built-in tools (formatter, linter, test runner), and uses modern package management through JSR.

When to Use This Skill

• Starting a new Deno project
• Adding dependencies to a project
• Configuring deno.json settings
• Running Deno CLI commands (fmt, lint, test)
• Setting up import maps
• Understanding Deno's permission system

Apply these practices whenever working in a Deno project (identified by the presence of deno.json).

Scope Boundaries