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deno-pro

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Deno runtime guidance — TypeScript-first development, permissions, standard library, and deploying Deno apps.

skills/deno-pro/SKILL.md

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## Overview

Deno is a secure-by-default JavaScript/TypeScript runtime built by the creator of Node.js, designed to fix Node's historical pain points: it ships TypeScript support, a built-in toolchain (formatter, linter, test runner), and URL-based imports instead of a package manager by default. Its permission model — no file, network, or environment access unless explicitly granted — makes it a strong choice for running untrusted or third-party code. This skill covers practical Deno development, dependency management, and deployment.

## When to use

- Starting a new TypeScript backend, API, or edge function where you want zero toolchain config.
- Running third-party or generated code and needing sandbox-style permissions.
- Choosing between Deno, Node, and Bun for a project.
- Publishing a library for the Deno ecosystem (JSR) or cross-runtime code.
- Deploying to Deno Deploy or containerizing a Deno service.
- Building CLIs or scripts where a single binary with no install step is valuable.
- Evaluating supply-chain security for JavaScript dependencies.