runtimes

Complete guide to available runtimes on Render, including versions, configuration, and best practices for each language.

Skills
Development
1

What it does and how to use it

A skill that teaches Claude Code to do development tasks well. It is packaged knowledge the model uses whenever it is relevant.

Install the skill (command above).
In Claude Code, describe what you need - the skill turns on by itself when the context fits.
No commands to memorize: you talk in plain language and the skill does the rest.

Install (Claude Code)

mkdir -p .claude/skills/runtimes && curl -fsSL https://doutorai.pt/data/lib/skills__runtimes.md -o .claude/skills/runtimes/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

# Render Runtime Options

Complete guide to available runtimes on Render, including versions, configuration, and best practices for each language.

## Native Language Runtimes

### Node.js (`runtime: node`)

**Supported Versions:** 14, 16, 18, 20, 21
**Default Version:** 20

**Version Specification:**

Specify Node version in `package.json`:
```json
{
  "engines": {
    "node": "20.x"
  }
}
```

**Package Managers:**
- **npm**: Default, uses `package-lock.json`
- **Yarn**: Auto-detected if `yarn.lock` exists
- **pnpm**: Auto-detected if `pnpm-lock.yaml` exists

**Common Build Commands:**
```ba

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