Tools

Know what's in the toolbox

What each tool is, how it's licensed, and when a dev would actually reach for it.

GroupAll Languages & runtimes Databases & backends Dashboards & UI kits CSS & component libraries Dev tooling & AI Game development AI agent skills

LicenseAny Open source Source-available Public domain Freemium Commercial Managed service Open standard

Dev tooling & AI

Build tools, API styles, containers, and AI coding assistants.

REST

Open standard

API architectural style

Resources addressed by URLs and manipulated with standard HTTP methods and status codes. Simple, cacheable, and understood by every HTTP client.

GraphQL

Open standard

API query language

Clients send a query describing exactly the fields they need and get back that shape in one request, from a single typed endpoint.

AI agent skills

Installable skill folders that teach a coding agent one specific job — design direction, polish, accessibility, design systems.

Agent Skills (the format)

Open standard

Open standard for agent skills

A skill is a folder with a SKILL.md file — a name, a description, and instructions — plus optional scripts and reference docs. The agent sees only the short description until a task needs the skill, then loads the rest. Published by Anthropic as an open standard in December 2025.